Classes for Trials Vehicles
The information below is extended from the details of the vehicular class system described in the Technical Regulations. It is a subset of the technical regulations and should be read referring to them, as needed. As we are regulated by the MSA we recommend you also refer to the current Year Book (referred to as the Blue Book) for vehicles and safety equipment, as this will supercede our regulations if required.
Class 1
The Class for specials and ATVs (All Terrain Vehicles). Vehicles may be extensively modified, but must still conform with the Technical Regulations. Four wheel steering, slewing brakes and open centred (dumper) tyres are permitted in this class, subject to the ASRs for the event.
Class 2
The amount of modifications allowed in this class are restricted but do include: changing of chassis lengths, change of spring type, change of engine and/or gearbox type. The axle choice is free.
What is not permitted:
- After market differential locking mechanisms
- Four wheel steering
- Slewing brakes
Open centred tyres (subject to prevailing ASRs) are permitted. It is recommended an amount of bodywork be retained to give an impression of the make of the vehicle, this should be easily identifiable by the average spectator. All vehicles must conform to the current technical regulations.
Classes 3, 4 & 5
The standard RTV categories are for road-going vehicles.
The modifications are limited to: Engine conversions; power steering fitment; free choice of wheels and tyres.
The fitting of safety equipment of any type is permitted.
A front screen frame must be in place as should be a mid¬mounted roof frame when competing (this is the absolute minimum). Tyres such as those described in section 9i of the technical regulations. (open centred) are not permitted for use on RTV vehicles. A valid Road Fund Licence must be displayed for that vehicle. Auxiliary lamps and low hang¬ing bodywork (such as sills) may be removed. A FULL width front bumper must be in place.
Class 3
RTV Wheelbase less than 85″
Class 4
RTV Wheelbase over 85″ but under 100″
Class 5
RTV Wheelbase 100″ and over.
Class 6
Allows any vehicle which does not comply with the listed class specifications above such as a home built hybrid to compete in trials. It will be run over the same sections as the RTV trial. There are no wheelbase classes as found in RTV. The only restriction is that open class competitors should not be able to use fiddle brakes if fitted and will need to run on a road tyre as tyre rule 9i. applies to this category.
Frequently Asked Questions
Towing Points
All vehicles must be equipped with towing points front and rear. The tow ball or point must be bolted using suitable nuts and bolts of adequate size. These must accept a rope loop and be secure without requiring the use of shackles or other such attachments. On Modified vehicles where a tow-ball is used, it must be fitted so as to retain the rope, i.e. it should either be mounted with the ball facing away from the direction of pull, or, where it is mounted close to a chassis member, a trap should be formed to prevent the rope from coming accidentally detached.
Recovery Rope
Be equipped with a nylon rope of a minimum 25mm diameter. This rope must have a closed loop at each end and be of at least 4.5 metres in length. The use of chain or wire bond is prohibited. Polypropylene or hemp ropes are not advisable. N.B. Marshals may use any equipment approved by the Clerk of the Course
Club Rules
1. Title.
The name of the Club shall be ‘The Isle of Wight Four by Four Club’ hereafter referred to as ‘the club’.
2. Objectives.
The objectives of the club are as follows:-
- To further interest in motoring and motor sport.
- To provide members with information, advice and assistance on matters connected with motoring and motor sport.
- To watch the local administrations of the laws and regulations affecting and motor vehicles, and to report any proposed local action or scheme to the RAC MSA Ltd.
- To promote motor competitions in accordance with the Rules of the RAC MSA Ltd.
- To arrange tours, lectures, discussions and social and other meetings.
- To afford Members such benefits and privileges as it may be possible to arrange.
3. Constitution
Ladies and gentlemen of not less than 17 years of age shall be eligible for membership.
4. Management
The authority and responsibility for the transaction of the business of the club and for it’s management shall be vested in the Committee, who, in addition to the powers and authorities by these rules expressly conferred on them, may exercise all powers and do all acts in furtherance of the objectives for which the club is established, other than those hereby expressly directed or required to be exercised of done by the club in General Meeting.
5. Election of Officers
The President, Vice-President, Treasurer, Secretary and Committee of the club shall be elected at the Annual General Meeting and subject to termination of office by resignation at the next annual general meeting following their appointment. The Committee shall have the power to co-opt other members as they deem necessary. The retiring officers and other members of the Committee shall be eligible for re-election.
6. Committee
The Committee shall consist of not less than eight and not more than eighteen members , exclusive of the President, Vice President, Treasurer and Secretary, who shall be ex-officio members of the Committee. The Committee shall elect from it’s own members a Chairman and Vice Chairman. One half of the Members of the Committee shall form a quorum.
Nominations of candidates for election to the Committee must be received by the Secretary not less than seven days before the Annual General Meeting, with an intimation in writing signed by each Member nominated that he or she is willing to serve. Nominations of Candidates shall be signed by the Member proposing them.
The Committee shall have the power to appoint a Sub-Committee of not less than three persons to meet on it’s behalf in respect of any matter which is specifically referred to such a Sub-Committee.
7. Members of the Committee
The Secretary either of his own accord or by the direction of the Chairman shall unless otherwise agreed by all the Committee give at least seven days written notice of a meeting.
8. Absence from Committee
Any member of the Committee who shall, without sufficient reason, absent himself from three consecutive Committee Meeting may be called upon to resign his position upon the Committee.
9.Duties of Secretary
It shall be the duty of the Secretary to attend in person or by deputy all meetings of the Club and all meetings of the Committee and to take minutes of the proceedings. Such minutes shall be entered in a book and presented for conformation at the following meeting
10. Banking
All monies of the Club shall be banked by the Treasurer in the name of the Club, and no disbursements shall be made there from except in accordance with the form or forms authorised by the Committee.
11. Election of Members
Applications of Candidates for membership of the Club shall be submitted to the Committee by the Secretary, and the election of such candidates shall be at the discretion of the Committee. The name and address of the candidate and the names of his/her proposed and seconder, being Members of the Club, shall be stated on each application submitted to the Committee, provided that in the case of a candidate who knows no member of the Club, the Committee shall be empowered to carry out the election after proper enquiries.
Membership of the Club shall continue only for the period covered by the current subscription, and Members shall be subject to re-election annually by the Committee.
All applications must be made by the individual in his own correct name and be signed by the said applicant personally.
12. Membership of any other Club
If a candidate is a member of any other Club or Organisation he shall not be entitled to affiliated membership either free or at a reduced rate.
13. Provisional Members
Any candidate for membership of the Club whose subscription has been accepted by the Secretary shall become a provisional member of the Club. Provisional membership of any candidate shall only hold good until the meeting of the Committee next after payment of the subscription of such candidate.
14. Voting of Committee Meetings
Each member present at a meeting of the Committee shall be entitled to exercise one vote. The Committee shall vote by ballot if any Member presents demands. A vote of one third against any applicant for membership shall exclude from membership.
15. Subscription
Annual memberships rates are as follows:
| Full Year | Joining After June | |
| Family/couple membership | £0 | £0 |
| Single person driving membership | £0 | £0 |
Membership runs from January to January hence the rates are reduced by 50% for members joining after June.
16. Payment of Subscriptions
Any payment for subscriptions will be payable in January annually.
17. New Members
Any member who has been notified of his election and who fails to pay his subscription within one month of such notification shall be again requested in writing by the Secretary or Treasurer to pay the same, and, if he fails to make payments within fourteen days thereafter his election shall be ipso facto, null and void. No newly elected Member shall be entitled to any of the privileges of membership until after the payment of his first subscription.
18. Non Payment
Any Member of the Club who has not paid any subscription due within two clear months of the date on which it became due shall be notified of the fact in writing by the Secretary or the Treasurer, and one month thereafter any member who has still failed to pay his subscription may, unless sufficient reason be shown to the satisfaction of the Committee, be taken off the Register of members forthwith. No Member whose subscription is in arrears shall be eligible to take part in any competitions organised by the Club and the Rules of the RAC MSA.
19. Resignation
Any member wishing to resign his membership shall give notice in writing of such desire to the Secretary on or before the date on which his subscription would have become due for renewal in any year, otherwise he shall be liable to pay his subscription for the ensuing year. Also any Member ceasing, voluntarily or otherwise, to be a Member of the Club, shall thereafter cease to have any claim upon the property of the Club, or to enjoy any privileges of the membership, but he or she shall remain liable for the payment of any debts due to the Club from him or her.
20. Use of Club Name and Address
The name and address of the Club shall not be given by a Member as his address for trade, advertising or business purposes or in connection with any legal proceedings.
21. Expulsion of Members
It shall be the duty of the Committee if at any time they shall be of the opinion that the interests of the Club so require, by letter to invite any Member to withdraw from the Club within a time specified in such letter, and in default of such withdrawal to submit the question of his expulsion to a meeting of the Committee to be held within six weeks after the date of such letter.
Members of the Committee shall be given at least 7 days notice that a question of withdrawal or expulsion is to be discussed at a meeting of the Committee. The Member whose expulsion is under consideration shall be given at least 7 days notice of such a meeting and shall be allowed to offer an explanation of his conduct verbally, or in writing and if two thirds of the Members present shall then vote for his expulsion he shall thereupon cease to be a member of the Club.
22. The Annual General Meeting
The Annual General Meeting of the Club shall be held in the month of January in each year upon a date and at a time to be fixed by the Committee. The Annual General Meeting shall:
a) Receive from the Committee a full statement of account duly audited showing the receipts and expenditure for the year.
b) Receive from the Committee a report of the activities of the Club during said year.
c) Elect a President and Vice-President, the Secretary and Treasurer of the Club, and if appropriate the Solicitor and Auditor.
d) Elect the Committee.
e) Settle any remuneration for the officers of the Club and the Solicitor and Auditor.
f) Decide on any resolution which may be duly submitted to the meeting as hereinafter provided.
23. Special General Meeting
A Special General Meeting may be convened by direction of the Committee, or on a requisition to the Secretary stating the business for which the Special General Meeting is required and signed by not less than 12 members. If the meeting so requisitioned is not convened within 21 days, the said (12) members may convene such meeting. 14 members shall form a quorum.
24. Agenda
When members wish a matter to be discussed at a General Meeting the text of such matter signed by at least two members shall be sent to the Secretary at least 14 days before the date of such meetings so that it may be included in the Agenda.
A copy of the Agenda shall be sent to each member at least 5 days prior to the meeting, but the fact that any member has not received a copy of the Agenda shall not invalidate proceedings. Business, which is not included in the Agenda, shall not be discussed at the meeting unless every member present is in favour thereof. Should the proposer of any motion fail to move a resolution in respect of the relevant item on the Agenda then any other member shall be entitled to do so.
25. Voting
Every person with the right to be present may exercise one vote. The Chairman shall not vote except in the exercise of a casting vote. At all General Meetings, except as provided in Rule 28, a majority of votes decides a resolution. At any General meeting any (12) members may demand a Poll, and thereupon the meeting shall be adjourned to a time and place to be named by the Chairman, and a postal vote shall be taken of all members of the Club. The decision of the members, as shown by such postal vote, shall be reported to the adjourned meeting and shall be deemed to be the decision of such meeting. The Rules relating to collective voting and proxies shall apply as in Clause 14 hereof.
26. Right to be Present
No-one can take part in General meetings unless he has been duly elected as a Member of the Club, and has paid his subscription accordingly to these Rules.
27. Observance and Interpretation of Rules
Every member binds himself to abide by the Rules of the Club, and also by any modifications thereof made in conformity with such Rules, and also to accept as final and binding the decision of the Committee in all cases of dispute or disagreement as to the interpretation of these Rules.
28. Alteration of Rules
Any alterations may be made in these Rules by a General meeting provided (a) that details of the proposed alteration or alterations are included in the notice of the General Meeting and (b) that the resolution proposing such alteration is carried by two-thirds of those present and voting at such General Meeting or by two-thirds of those voting should a Poll be demanded as provided for in Rule 25.
29. Events
All motor competitions organised by the Club shall be held under the Rules and requirements of the RAC MSA Limited.
Any Member convicted of any offence arising out of his being in charge of a motor vehicle in any Club event or on Club business shall thereupon be liable to expulsion from the Club under Rule 21.
30. Copies of Rules
Every member shall be furnished with a copy of the Club Rules and Regulations on election.
31. Dissolution
The Club may be dissolved by a Special General Meeting convened by direction of the Committee, or on the requisition of the majority of the members.
If the resolution of dissolution be duly passed, the Committee shall forthwith liquidate the affairs of the Club, and if there be any surplus assets on realisation, these shall be disposed of at the discretion of the Committee.
Officials
The following section details the roles and responsibilities of Officials at events. The duties of officials are not event specific and some duties/positions are only applicable at certain types of events.
CLERK OF THE COURSE
The Clerk of the Course must be present throughout the competition and is responsible for the general conduct of the meeting in accordance with the regulations, programmes and organising permit and, in particular, he shall either directly or through his powers of delegations:
a) ensure that all relevant regulations are complied with and that all the equipment needed to do so is in hand or in use.
b) keep order in conjunction with such Police Authorities as have undertaken the policing of the meeting and who are specially responsible for public safety.
c) mark out the route or sections in the accepted manner and without ambiguity. The best way to mark out is to have a relatively few vehicles, equipped with radios, and each with a complete set of tools and materials. Individual vehicles are dropped off to mark each feature while the Clerk of the Course’s vehicle concentrates on route finding. After the route is complete, the course length must be measured and that information conveyed to the Timekeeper.
d) make a plan of the course and use marker boards to identify key points.
e) before the start, ensure that all Officials are adequately briefed and at their posts.
f) ensure that any additional instructions are issued to Competitors in a satisfactory manner.
g) arrange for all vehicles to be routed to the Scrutineering area.
h) ensure that every accident or incident involving a competing vehicle is reported to the Stewards and the Chief Scrutineer, and that the Medical Officials are informed if any Competitor is injured.
i) control all Competitors and Official’s vehicles throughout the meeting and ensure that the correct Driver is in each vehicle. Marshall the vehicles as necessary and organise the starting of Competitors.
j) the Clerk of the Course and his Assistant should expect to be out on the course, mobile and in radio contact throughout the event. They should organise the marshals with the assistance of the Chief Marshall to solve individual problems and avoid becoming too committed themselves.
k) convey to the Stewards of the Meeting any proposal to modify the programme or any report that deals with the misbehaviour of a Competitor.
l) arrange with the Secretary of the Meeting to provide all the information necessary to enable the Stewards of the Meeting to complete their report.
m) at his discretion, exclude a Competitor reported by Officials for careless or reckless driving, or for an offence for which a penalty of exclusion is specified in the regulations.
n) ensure that all equipment is removed from the site and that any losses are reported.
MARSHALLS
Chief Marshall. It is the Chief Marshall’s job to be in charge of recovery tasks and to make sure that Marshalls are aware of their duties.
Marshalls. Often a seemingly unrewarding task but it is essential to running a trial. All Marshalls must sign on, and arm bands and/or fluorescent jackets are available from the control caravan. A Marshall’s job is to carefully watch each vehicle from a designated spot and to indicate to the Finish Marshall if a vehicle has touched a cane or ceased forward motion. Marshalls should not be intimidated by any driver’s remarks or comments and in the case of query should liase with the Chief Marshall, Clerk of the Course or any other Official. A Marshall’s responsibility also means that he can halt a vehicle if he or she thinks that an accident could occur. Always liase with the Clerk of the Course.
SCRUTINEER
It is the responsibility of the Scrutineer to ensure that all vehicles competing in any event comply with the technical regulations in force for that type of event, and complete the Scrutineering cards provided by the Secretary of the Meeting.
The Chief Scrutineer may co-opt assistants to help with his duties, but must personally be involved in any decision to fail a vehicle. In the event of a vehicle failing Scrutineering, a full report of the reasons for such failure must be made to the Clerk of the Course.
Each Scrutineer who is responsible for finally approving any vehicle taking part in the event shall remain on duty until all vehicles he has approved have completed the competition.
The Scurtineers may ask a driver to undertake repairs or additions to a vehicle before the next trial or speed event he enters. A copy of the requirements is kept and any vehicle failing to have complied with the request will fail scrutineering.
All drivers must report to the scrutineer to have their vehicles checked.
TIMEKEEPER
Timekeepers at competition safaris must not accept responsibility for ensuring that the course is clear and that it is safe to permit the next Competitor to start. This decision is the responsibility of the Clerk of the Course.
In any competition which contains a timed element, it is the responsibility of the Timekeeper to supervise the Timekeeping operations, complete all necessary documents and prepare a complete set of results. The Chief Timekeeper should appoint a sufficient number of assistants to enable timekeeping operations to be carried out successfully.
STEWARDS
The Stewards of the Meeting shall not be responsible for its organisation and shall not have any executive duty in connection with the event. There must be at least two Stewards of the Meeting.
No persons should be appointed as a steward who is not experienced in motor sport. The Stewards of the Meeting shall be general power and authority to enforce compliance with the regulations and any additional instructions to drivers issued for the event.
It will be their duty to adjudicate upon any dispute or protest arising during the meeting. They may in exceptional circumstances modify the Supplementary Regulations, postpone, stop abandon or arrange for a restart if conditions require. They may also prohibit from competing any driver who or any vehicle which they consider to be dangerous or is reported as such by the Clerk of the Course or a Scrutineer and deal with allegations of careless or reckless driving.
The Stewards are empowered to suspend a competitor’s licence for 30 days in the event of their directing abusive language or behaviour towards an Official of the Meeting.
As soon as is practicable after the conclusion of a meeting, the Stewards shall, with the help of information provided by the Clerk of the Course, compile, sign and send to the MSA a report giving results of each competition, together with particulars of any accidents involving injury or damage to property, all protests lodged, action taken thereof, penalties imposed, together with any recommendations in respect of such cases.
The report should also contain the Steward’s general comments on the organisation of the meeting and the exercise of their own powers in relation thereto.
For further information on the General Rules and Regulations relating to Motor Sport organised by MSA registered clubs members should consult the ‘Motor Sports Association Competitors Year Book (Blue Book)’ published by The Royal Automobile Club Motor Sports Association Ltd (RAC MSA)
Isle of Wight 4×4 Club Code of Conduct
- Use only rights of way with known, proven or provable vehicular rights. If challenged, discuss; if not resolved, then leave as requested until the status is rechecked.
- Keep to the defined track. Detour only to pass immovable obstructions. Report any obstructions (including low branches) to the highway authority and ask a committee member to discuss it at the next meeting. Be critical of your own abilities and equipment when assessing an obstruction; it is your right to abate a non-lawful obstruction, but do not commit yourself to a bigger task than you are equipped for.
- If the route is not obvious on the ground ask. Either locally, or check on the maps held at the highway authority offices.
- Travel at a quiet and unobtrusive pace and as slowly as practicable; we recommend a maximum of 12 mph when in a 4×4 and on an Unsurfaced Right of Way (URoW). Ensure your vehicle is fully road-legal.; URoW are subject to the same laws as surfaced roads.
- When travelling in groups, keep to a small number – ideally four or less. Split larger parties up and either use a different route or allow a good interval to elapse before following.
- Do not travel on URoW when they risk being affected beyond a point of natural recovery once the weather improves. If need be, walk some or the entire route first to determine its suitability. Do not use URoW which maybe damaged by the wheel pressure applied by your vehicle.
- Avoid damage to trees, hedgerows and boundaries. Some roads carry vehicular rights but are physically too narrow for 4x4s.
- Do not practice recovery techniques on any URoW. Use a winch only with extreme caution, and use only the correct equipment and techniques.
- Be courteous to other road users – pull over and stop your vehicle for walkers, but pull over, stop your vehicle and switch off the engine for passing horses; the same courtesy should also be shown to walkers with dogs, if the dogs show the least sign of nervousness round vehicles. Thank those who move over for you.
- After consultations with Country Landowners Association and National Farmers Union HQs, “best practice” dictates that gates if they were found to be secured in an open position should be left open, and those which are found shut or swinging should be shut behind you; the landowner might appreciate being told about a gate insecurely propped open if you see them.
- Keep dogs and children under close control. Watch out for injured or trapped animals, and report all suspicious events to the landowner.
- Guard against all risks of fire. Take your litter home and that left by others if you see it, wherever practicable. Plastic bags can suffocate stock if swallowed. Help to keep all water clean. Remember that wildlife faces many threats and UROW are valuable habitats. Take special care in spring and early summer.
- Follow the Country Code, but be aware that it is for your guidance only
With acknowledgement to the All Wheel Drive Club and the Green Lane Association
Membership
Membership application forms can be obtained from the Membership Secretary, see the Contacts section for contact details.
Annual memberships rates 2018 are as follows:-
| Full Year | Joining After June | |
| Family/couple membership | £0 | £0 |
| Single person driving membership | £0 | £0 |
Membership runs from January to January hence the rates are normally reduced by 50% for members joining after June.
Technical Regulations
The following technical regulations cover vehicles which are to be used for RTV and Modified trials. The regulations are taken from the current Motor Sports Association year book (Blue Book) and all competitors are advised to obtain a copy of the Blue Book which details all of the regulations covering Motor Sport in the United Kingdom.
Modified trials vehicles taking part in trials held wholly on private property need not be registered, taxed or fitted with a speedometer. Vehicles competing in RTV trials should be taxed and have a valid MOT.
All vehicles must comply with the following regulations:-
1. Chassis
i. Have a protective bulkhead of non-flammable material between the engine and driver/passenger compartment capable of preventing the passage of fluid or flame in the case of fire. All gaps/holes must be sealed with GRP, intumescent putty or other non-flammable sealant. Magnesium is prohibited for bulkheads.
ii. Have a complete floor of adequate strength rigidly supported within the driver and passenger compartment. No gaps or holes should be visible.
iii. Have a minimum wheelbase of 1270mm (50 inches)
2. Body
i. Be fitted with bodywork that includes a crew compartment effectively isolated from the engine, batteries, gearbox, transmission shafts, brakes, road wheels, operating linkages and attachments, petrol tanks, oil tanks, water header tanks, brake reservoirs, catch tanks and radiators.
ii. Be fitted with doors of bodywork giving side protection to the driver and passenger. These should comply with the side waistline requirement as detailed in section 3 (seating)
iii. Have a bonnet of casing of metal or solid non-flammable material covering and surrounding the main engine structure which is secured by fasteners of adequate strength and have a positive locking action. All moving parts of the engine must be covered.
iv. Be fitted with bodywork of sufficient internal size to comply with regulations 2vi and 3i below.
v. Not have the space normally occupied by the passengers encroached upon but may have the passenger seats removed.
vi. Have bodywork providing a minimum transverse cockpit opening width of 810mm. This width may not be interrupted.
vii. Be equipped on all wheels with mudguards which present no sharp edges and cover the full width of the tyre around an arc of 120 degrees. This must be achieved with a continuous surface of rigid material with no gaps, slots, holes or vents. It must extent forward ahead of the axle line and downward behind the wheel to the centre line of the axle.
3 Seating
i. Have a normal adequate seat within the driver/passenger compartment. The seat must be rigidly located within the compartment and for Modified vehicles must not tilt, hinge or fold. It must retain the driver within the vehicle. The rear most part of any seat must not be more than 380mm behind the rear wheel axis. The seat cushion when uncompressed must not be less than 150mm below the top edge of the adjacent body side or door. Other seats which are fitted must similarly comply.
ii. Modified vehicles should have head restraints fitted to prevent the drivers head going backwards on impact.
4 Engines
i. Be equipped with a positive method of throttle linkage closing in the event of a linkage failure by means of an additional external spring to each throttle spindle.
ii. No vehicle may draw induction air for within the driver and passenger compartment. Air intakes must either be forward of the front bulkhead/windscreen of piped through to the rear of the vehicle to draw outside air from behind the rear bulkhead. The air pipe must be of non-flammable of flame retardant and fuel resistant material and must be securely located.
iii. The choice of size and make of engine is free in all trials classes.
5 Suspension
i. Be fitted with sprung suspension between the wheels and the chassis unless originally manufactured otherwise.
ii. The choice of spring and damper supplier is free. In RTV classes lifted springs may be fitted but they must use the original manufactures mounting points. In RTV classes dampers must use the original manufacturers mounting points.
iii. Suspension and steering movement must be controlled to avoid fouling of wheels and tyres on chassis or bodywork.
6 Brakes
i. Be fitted with brakes that are operative and capable of stopping and holding the vehicle as required. A foot operated single pedal brake system should be used to achieve this.
ii. Independently operated front or rear brakes are permitted in modified class one trials vehicles to act as fiddle brakes. They are not permitted in modified class Two, or RTV trials vehicles.
iii. A separate hand brake system must be fitted to all vehicles.
7 Steering
i. Have a full circumference full diameter steering wheel unless originally manufactured otherwise.
ii. Have steering movement controlled to avoid fouling of wheels and tyres on chassis or bodywork.
iii. Have steering lock assemblies removed on all modified trials vehicles.
iv. RTV trials vehicles must have the steering wheel and the steered wheels directly connected by a mechanical link.
v. The fitment of a power assisted steering system is permitted in all trials classes. Lock stops on front axles must be in place in RTV classes, in Open and Mod classes they may be removed as long as the requirements of 7ii. are complied with.
vi. It is permitted to extend the steering drop arm in Modified classes however this is a component which is under tremendous stress whilst in use therefore it is essential to carry out this conversion to the best engineering standards.
8 Wheels
Except in the case of vehicles originally manufactured without wheels all vehicles shall comply with the following.
i. Have not less than four road wheels and tyres (excluding the spare).
ii. Not be fitted with any wheel spacers exceeding 25mm in thickness.
Not be fitted with duplicated driving wheels unless originally manufactured otherwise or unless permitted by supplementary regulations. Reversing of standard and altered road wheels within the RTV classes is prohibited.
9 Tyres
i. Be fitted with wheels and tyres that are compatible and also acceptable to the organiser. A particular type and size of tyre may be prohibited by the ASRs. The use of dumper-type, open-centered or very aggressive tread pattern tyres is be prohibited in RTV and Modified trials at certain venues (for example Military venues). In all RTV and Open classes hand cutting of tyres is strictly forbidden. RTV class vehicles are not permitted to run dumper tyre, open-centered or very aggressive tread pattern.
ii. A spare wheel need not be carried.
iii. Modified class vehicles may have more than four wheels and tyres.
iv. All tyres used on any event must comply with the minimum DOT requirements on depth of tread.
v. The use of tyre chains and studded tyres by competitors is prohibited.
vi. Tyres should be covered by the mudguards or body work to cover the whole width of the treaded area.
10 Cooling
i. Have any fluid lines or tubes or internally/externally metal braided hydraulic pressure hoses carrying coolants through the driver and passenger compartment enclosed in a solid metal cover and insulated and isolated to prevent the occupants of the vehicle touching the hot surfaces. Such lines or tubes or coverings must be painted red.
ii. All open radiators, expansion bottles whether front or rear mounted, must be covered in such a manner that nobody can burn themselves on the hot open/unprotected areas of the radiator. Special attention should be made to protect occupants from hot water from an exploding radiator.
11 Transmission
i. Have the transmission outside the driver and passenger compartment, beneath the floor or secured in casings or covering of solid material.
ii. Be equipped with an operable reverse gear.
iii. The use of limited slip, torque biasing, or locking differentials is permitted in Modified class 1,2 and RTR Class 6. Modified vehicles may have their diff’s welded or pegged permanently locked. Classes 3,4 & 5 RYV vehicles may only have diff locks or limited slip diffs if it was a production fitment for that particular vehicle.
iv. Vehicles may have traction from tracks if produced in that manner.
v. Vehicles with automatic transmissions shall have a starter inhibiting switch allowing it to start in park and/or neutral only.
12 Oil Systems
i. Have any oil lines passing through the driver/passenger compartment protected, and if non-metallic enclosed in internally/ externally metal braided hydraulic pressure hose.
ii. Oil coolers, filters and cooling water expansion tanks must not be fitted in a position where, if burst, the hot fluid can come into contact with the occupants of the vehicle.
13 Fuel Systems
i. Have any fuel lines passing through the driver/ passenger compartment protected, and if non-metallic or pressure lines, enclosed in internally/externally metal braided hydraulic pressure hose.
ii. If fitted with fuel fillers in the boot, or under closure, have collector/ spill trays incorporated to enable spillage to drain outside the vehicle.
iii. Use normally available pump fuel. The use of fuel additives, octane boosters, or AVGAS (aviation fuel) is prohibited.
iv. If using LPG, conform with the Construction and Use Regulations, and also the LPG Industry Technical Association Code of Practice No.11.
v. Have tank fillers and caps which do not protrude beyond the bodywork, nor are situated within the driver/passenger compartment. The caps must have an efficient locking action to reduce the risk of accidental opening during an accident and ensure closing after refueling. Air vents must be at least 250mm to the rear of the cockpit. All fuel caps should be of the sealed type to prevent spillage.
vi. It is strongly recommended that the fuel tank is covered with an outer steel container which acts as a second line of defense in the event of a roll over.
14 Electrical Systems
i. Have any batteries in driver/passenger compartment enclosed in a leak proof container and securely located. Such batteries must be duly protected to prevent leakage of acid and spillage onto the occupants of the vehicle in the event of a rollover.
ii. Have battery terminals which are protected from any metal contact which could result in a short circuit.
iii. Be equipped with battery, generator and self-starter. RTV vehicles are required to be fitted with operative sidelights, tail lights, brake lights and headlights.
iv. Headlights on modified vehicles (Class 1 and 2) will be required in all night events.
v. Have the battery earth lead, if not readily distinguishable, identified by a yellow marker.
vi. Be fitted with suppressors as required by the Wireless Telegraphy Regulations.
vii. Modified (Class 1 and 2) vehicles must be equipped with a circuit breaker. This must isolate the battery from all electrical circuits and must cut the engine at the same time. The switch location is optional, but its operation must be possible from both inside and outside the vehicle. The circuit breaker control(s) must be identified by a red spark on a white edged blue triangle. If a diesel engine is fitted with an electric stop it must be connected to the circuit breaker. If it is a pull cable stop system a second cable must be fitted next to the isolator switch and marked clearly “pull to stop engine” on a plate 75mm x 50mm white background with red lettering.
15 Towing Points and Recovery Rope
i. All vehicles must be equipped with towing points front and rear. The tow ball or point must be bolted using suitable nuts and bolts of adequate size. These must accept a rope loop and be secure without requiring the use of shackles or other such attachments. On Modified vehicles where a tow-ball is used, it must be fitted so as to retain the rope, i.e. it should either be mounted with the ball facing away from the direction of pull, or, where it is mounted close to a chassis member, a trap should be formed to prevent the rope from coming accidentally detached.
ii. Be equipped with a nylon rope of a minimum 25mm diameter. This rope must have a closed loop at each end and be of at least 4.5 metres in length. The use of chain or wire bond is prohibited. Polypropylene or hemp ropes are not advisable. N.B. Marshals may use any equipment approved by the Clerk of the Course
16 Exhaust System
i. Have the exhaust system isolated from the driver/passenger compartment (e.g. beneath the floor or secured in casings of solid material).
ii. Trials vehicles may have front mounted exhaust. Hot surfaces must be covered or shielded with suitable material.
iii. Have no part of the exhaust system protruding laterally beyond a plane through the outer track of the front and rear wheels, or to the rear of the bodywork more than 150 mm.
iv. If all enveloping body is fitted, have supplementary protection for exhaust systems that protrude outside the bodywork.
v. All exhaust outlets to be not more than 610mm from the ground and face to the rear and downwards.
17 Silencing
i. In all events, conform to a maximum permitted noise level as laid down in the current MSA ‘Blue book’. The requirement as listed in the 1999 MSA blue book is a Max of 100db at 0.5m with the engine at 2/3 maximum revs. Continuous noise testing will take place during events and competitors will be advised of excessive noise. WARNING: Temporary silencers, bypass pipes and the inclusion of temporary parts to achieve silencing requirements are prohibited. Officials may refuse to carry out noise checks on vehicles utilizing temporary parts in exhaust systems. Please refer to section E of the current MSA Yearbook. Measurements to be taken at 4500 rpm max (or two thirds throttle opening if no tachometer fitted or diesel engine) with engine at normal working temperature.
18 Windscreens and Side screens
ii. If fitted to have windscreens of either laminated glass or plastic, of a minimum thickness of 4mm (except RTV Trials Vehicles). Plastic side screens, where fitted, should also have a minimum thickness of 4mm unless fitted otherwise by the original manufacturer.
iii. The use of mesh or net hinged sidescreens on open vehicles to retain the limbs of driver and passenger in the event of a roll-over is advised. The use of a sun roof with glass is not permitted in Modified vehicles where it should be replaced with a metal panel.
19 Roll Over Protection/Roll Cages
Aluminum alloy roll over bars and roll cages are banned in all forms of motorsport where a roll cage is required to be fitted. The use of roll cages is advised for all events. Full roll cages as per drawing 2 below are mandatory in Modified (Class 1 and 2) classes.
19.1 General Considerations
i. The basic purpose of the roll over bar is to protect the driver/passenger if the vehicle turns over or is involved in a serious accident. This purpose should not be forgotten, and in consideration of this, all roll bars and roll cages should be built to the following RAC specification detailed in Section (b) or an approved Cross Country Vehicle and Four Wheel Drive design which should in any case incorporate many of the provisions detailed therein.
ii. The roll over bar/cage must be designed to withstand compression forces resulting from the weight of the vehicle coming down on the roll bar/cage structure, and to take fore and aft loads resulting from the vehicle skidding along the ground on its roll structure.
iii. Modified classes must have a full roll cage with two rear facing braces and a cross brace situated either within the main rear hoop or as close as possible to it as per drawing 2 below. The minimum in the standard RTV classes is a screen or roof frame which extends past the height of driver and passenger and fitted by the manufacturer, it is recommended to fit a central roll hoop with rear bracing bars and central diagonal for any open topped vehicle competing in standard RTV as drawing 1 below, this is not mandatory only advisable.
19.2 Fabrication
i. The main hoops and rear braces must connect direct to the chassis by either welding or bolting. One continuous length of tubing must be used for the hoop member with smooth continuous bends and no evidence of crimping or wall failure.
ii. All welding must be of the highest quality with full penetration. Wherever possible gas shielded arc welding should be used.
iii. For space frame vehicles it is important that the roll bar structure is attached in such a way as to spread the load over a wide area. The roll bar should be designed as an extension of the frame.
iv. For monocoque chassis, consideration should be given to using a 360 degree hoop completely around the inside of the vehicle, thus substituting for a frame.
v. Braces should be of the same size tubing as used for the main structure, their fixing should be located as near as possible to the (top of the roll bar, in any case at a minimum of three quarters of the height of the roll bar.
vi. The mounting plates of the roll bar braces to the chassis must be of steel plate of minimum thickness 3mm, welded, riveted or bolted onto the chassis. The total surface area of each plate should be not less than 120sq cm of which at least one third connects with a chassis vertical member. The chassis outrigger to carry the roll bar mounting must be a minimum of 75mm x 50mm x 3mm box section.
vii. The mounting of the main roll bar hoop(s) must be secured with at least three steel bolts and nuts, hexagonal headed bolts of minimum diameter 8 mm, or by at least three high tensile Allen head cap screws and nuts of at least 8 mm diameter. The attachment plate to the roll bar braces must be of the same thickness as the wall of the tube. When the roll bar rests on a box member of the latter, it must be locally reinforced by a structure constituted of either welded bolt heads or welded tubing ends.
viii. Removable connections used in roll bar design should conform to the recommendations within the MSA blue book.
ix. Bolts and nuts used should be of highest quality steel (preferably aircraft standards) and be of sufficient minimum diameter according to the number used. Square head bolts and nuts are prohibited.
19.3 Closed Vehicles
As a general rule, the safety roll over bar structure must be made of two hoops, one behind the front seats and the other following the windscreen pillars (Refer to current MSA yearbook for full details of all drawings). The structure must be constructed in such a way as not to obstruct access to the front seats and not encroach upon the driver/passenger space. It may encroach upon the rear passenger space and pass through the rear upholstery. The main hoops must be placed as near as possible to the roof. It is permissible to mount a longitudinal support at door level providing it forms part of the structure and is of similar tube dimensions. It may be welded in or located with approved couplings, it must not be higher than one third of the door height above the sill and angled at more than 5 degrees with the horizontal.
19.4 Open Vehicles
To the same specifications as Closed Vehicles, except the main hoop must be symmetrical about the longitudinal center line of the car and complying with current MSA drawings.
19.5 Other Considerations
i. An effective roll over bar must be fitted of a height not less than 50mm at its top edge above the helmet of the normally seated driver. It must be wider than the driver’s shoulders at that height. It must be constructed of steel tubing of minimum 44.30mm diameter with a minimum wall thickness of 3.2mm. It should have a hole of 6mm drilled in the underside for checking the tube thickness. It should have the top bar straight or curved, but not tubes meeting in an inverted ‘V’. It must be effectively braced to a structural member.
ii. Closed vehicles the main roll over bar hoop must be placed as near to the roof as possible.
iii. Non-standard vehicles are advised to fit a safety roll over bar to the following minimum requirements: minimum height 710mm from the rear of the uncompressed seat cushion, of minimum flat width 380mm running into radius corners and affording driver and passenger equal protection. It must be mounted to a structural member with front mountings not less than the cockpit width and braced rearward.
19.6 Diagonal Struts
These should be fitted such that the upper forward joint is on the driver’s side of the vehicle to add further support in the area of the driver’s head.
19.7 Materials
(All dimensions represent minimum requirements.) Tube Specification: Cold drawn seamless carbon steel, minimum yield strength 350 N/sq.mm, 38mm x 12g for vehicles up to 1500kg. An alternative material is BS1387 medium weight blue band, dimensions being 44.30 mm x 3.2mm for vehicles up to 1000kg or 48.OOmm x 3.2mm for vehicles exceeding 1000kg. All diameters are outside diameters. In all groups recognized manufacturers may utilize a roll over bar of free conception as regards material and tube thickness providing it is able to withstand three simultaneously applied loads:l.5 w lateral5.5 w fore and aft 7.5 w vertical w = weight of vehicle plus 75 kg. Roll over bars of this type must be supported by a duly signed and completed Safety Roll Bar Certificate. The roll bar manufacturer must be registered with the MSA Ltd. Titanium is prohibited.
19.8 Roof
Vehicles in Modified classes (Class 1 and 2) should be fitted with a roof panel if the driver chooses not to use a MSA approved helmet. Specification for roof is :- A panel which is sufficiently strong enough to protect the occupants in the event of a rollover, the panel must cover both occupants adequately. An MSA scrutineer has the final decision as to what is sufficient When fitted to the rollcage it should not be riveted into the tubing.
20 Overalls
i. Overalls are not compulsory but advisable. Oil soaked clothing should not be worn whilst competing.
21 Crash Helmets
i. Crash helmets in Modified classes are to be used if a solid roof is not fitted. A helmet is compulsory in timed trials and team recovery competitions. The helmet must conform to the current RAC MSA regulations listed in the ‘blue book’ in section 0 10.3.1. In the event of purchasing a B.S. 6658-85 ‘A’ type helmet this will have a blue B.S. label attached. You are recommended to consider a helmet with a fire resistant lining, the label will read B.S.6658-85 A F/R and is red in colour, these may be enforced upon us in future years. Helmets with a green B.S. label are not acceptable for motor sport use. Please protect your helmet from external damage by using a helmet bag or similar, chips within the outer laminate of the helmet may make it unsafe and unusable.
22 Seat Belts
i. All Safety Belts must be made out of approved materials and anchored securely in the vehicle. No modification may be made to the seat belt or seat buckles, unless it is carried out by the belt manufacturer. The minimum requirement for RTV trials one diagonal shoulder strap and one abdominal strap, with fixing points on the body or chassis of the vehicle on either side and to the rear of the driver’s seat. The seat integral safety belt design of the Range Rover is acceptable for RTV only. Modified classes must wear a harness of 3,4 or 5 point mounting It is compulsory for all occupants to wear seat belts while competing. The only exceptions to this rule are HGV vehicles competing in Heavy Vehicle trials and any vehicle competing in a Family Vehicle Trial that is not legally required to have seat belts fitted.
23 Fire Extinguishers
i. Products permitted for use within AWDC events are listed in section Q of the current MSA Yearbook. All vehicles must have a handheld extinguisher in the driver/passenger compartment, The minimum requirement for this is as follows: AFFF (manufactured to a standard of 34b) minimum Capacity 1.75 litres, Zero 2000 Minimum capacity 2.25 litres, ViR03 Minimum capacity 2kg.
24. Classes for Trials Vehicles
Class 1
The Class for specials and ANs (All Terrain Vehicles). Vehicles may be extensively modified, but must still conform with the Technical Regulations. Four wheel steering, slewing brakes and open centred (dumper) tyres are permitted in this class subject to the ASRs for the event.
Class 2
The amount of modifications allowed in this class are restricted but do include: changing of chassis lengths, change of spring type, change of engine and/or gearbox type. The axle choice is free. After market differential locking mechanisms are not permitted. Four wheel steering is not permitted. Slewing brakes are not permitted although open centred tyres (subject to prevailing ASRs) are. It is recommended an amount of bodywork be retained to give an impression of the make of the vehicle, this should be easily identifiable by the average spectator. All vehicles must conform to the current technical regulations.
Class 3
RTV Wheelbase less than 85″
Class 4
RTV Wheelbase over 85″ but under 100″
Class 5
RTV Wheelbase 100″ and over.
This standard RTV category is for road going vehicles. The modifications are limited to: Engine conversions; power steering fitment; free choice of wheels and tyres. The fitting of safety equipment of any type is permitted. A front screen frame must be in place as should be a midmounted roof frame when competing (this is the absolute minimum). Tyres such as those described in section 9i. (open centred) are not permitted for use on RTV vehicles. A valid Road Fund Licence must be displayed for that vehicle. Auxiliary lamps and low hanging bodywork (such as sills) may be removed. A FULL width front bumper must be in place.
Class 6
Allows any vehicle which does not comply with the listed class specifications above such as a home built hybrid to compete in trials. It will be run over the same sections as the RTV trial. There are no wheelbase classes as found in RTV. The only restriction is that open class competitors should not be able to use fiddle brakes if fitted and will need to run on a road tyre as tyre rule 9i. applies to this category.