The rules for the Unlimited Class will be followed with the following additions:
1. Magnets will be
restricted to two motor magnets only.
2. The car must pass the Lift Test, unless the track being raced on has non-magnetic rails.
1. The lift testing device is a 5/16 piece of O-1 Drill rod that is 1.312 inches long and has .004 of additional non-magnet surface. Typically this additional non-magnet surface can be achieved with tape layers.
2. In order to pass inspection, the lift testing device is placed anywhere on the bottom of the car, in a horizontal position, and cannot be held by the car. Testing may require removal of the pick-ups or tires.
HOPRA UNLIMITED CAR CLASS
RULES
1. General rules 1 through 12 are not applicable to this class. General rules 13 through 26 are applicable and shall be followed.
2. There are no restrictions on chassis cutting. Scratch built chassis’ will be allowed.
3. There are no restrictions on the type of magnets, magnet material, position of magnets, or number of magnets. Cobalt or Rare Earth type magnets will be allowed.
4. There are no restrictions on the armature, bearings, gears, wheels, axles, tires, guide pin and electrical system.
5. Any car or device, which is considered hazardous to the track, the marshals, other drivers or other cars, shall be declared illegal and not allowed to run.
HOPRA General
Rules
13. The minimum allowable wheelbase is 1 ¼ (1.250) inches.
14. The maximum allowable width of the car is 1 5/16 (1.3125) inches.
15. The maximum allowable length of the entire car is three (3.00) inches.
16. Only one guide pin per car shall be allowed.
17. The maximum allowable lateral movement of the front axle is 1/32 (.03125) inch.
18. During the race, any individual part of the car may be replaced. The chassis and body are not considered individual parts. The Race Director or Technical Inspector has the right to inspect any car after repairs have been made. If repairs are necessary, they shall be made before the car may re-enter the race. The repairs may be made during lane change periods or on the driver’s race time. The race shall not be stopped for
repairs unless the Race Director has declared a track call specifically to allow for repairs.
19. The body must be painted and rear wings/spoilers maybe added for esthetics only.
20. The body must cover the chassis, tires and wheels when viewing the car from above except through legal openings (i.e. windows, etc.). No body cutting except for wheel openings. Open wheel bodies are only allowed in Stock Class. This rule does not apply to the Vintage T-Jet car class as it is subject to its specific body regulations.
21. Any car without a body or with an interfering body will not be allowed to continue to run.
22. Cars must be equipped with four tires, which touch and roll when checked on a test track with no or low rails.
23. The driver has the final responsibility to prove the legality of his car.
24. Every car entered may be required to submit to a post-race technical inspection. Failure to comply will result in immediate disqualification of the car and entrant and forfeiture of entry fees paid for that entry.
25. If necessary, a vote by the National Executive Committee members present shall determine the final interpretation and enforcement of any and all rules. If it does not appear in this rulebook, it is not legal for H.O.P.R.A. competition.
26. All items to be added to the agenda for the open meeting must be submitted in writing or email to the National Director no later than March 1st. Any additions after that time must be approved by at least three (3) members of the National Executive Committee.
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