Annual Grown-up Pinewood Derby || Proof Eyewear #ProofGrandPrix
Posted on by Lance Williams
2014 Proof Grand Prix Official Rules:
Overall: All cars must be built for the current Pinewood Derby Racing Season. NO REPEATS or REPAINTS. In order to race at the
council championship the youth must have been a Cub Scout at some point since January 1st, 2014. Cars must be tuned or aligned with the
racer, adult supervision is encouraged. Cars may not be sent to third party facilities for tuning or other performance enhancements.
The main body structure must be made of wood. Cars that were purchased completed may not be used. If the builder lacks the resources to cut
out a car from a stock block of wood, attendance at a workshop(den/pack/district/council) is strongly encouraged. Alternately, a pre-shaped
block may be purchased to be used with the stock BSA Wheels and approved Axles.
A. Width - Not to exceed 2 3/4 inches
B. Length - Not to exceed 7 inches
C. Weight - Not to exceed 5.0 ounces on scale accurate to 1/10 ounce.
D. Height - Not to exceed 3 inches
Center Rail Width: Must clear center guide rails, typically no less than 1-3/4 inches minimum.
Bottom: No less than 3/8 inches from track surface between center rails. NOTE: Most aluminum tracks have more space available
for the bottom attached weights sold at BSA stores and should be allowed.
Other: Fender flairs with less clearance are acceptable as long as the center rail width clearance is maintained. Weights are preferred
to be inset in the body or on top of the car to aid in a safe stop at the end of the track. No part of the car or attachment to any car, which
is metal, pointed, sharp, and/or jagged, may be capable of contacting any part of the track.
F. Wheelbase –All cars must have a wheel base no less than 4", with the two rear wheels being positioned directly across the body from one
another and the two front wheels being positioned directly across the body from one another.
G. Front End Height: Depending upon the track, the front of the car may rest against a short starting pin. Therefore the front bottom of the car
which rests on the pin is no higher than 1" above the track.
Width: The front end must be at least ½ inches wide in the middle.
No part of the car body, wheels or attachments may protrude in front of the starting peg.
The car design may be enhanced by the addition of other stable materials such as plastic or metal. Any additions must be firmly attached and
meet Car Size Requirements.
B. Starting devices or propellants
C. Electronic or lighting devices that interfere with the race electronics.
D. Liquids, wet paint, oil, sticky substance, or powders of any kind (other than axle lubrication)
E. Glass or excessively fragile parts
F. Bearings, bushings, washers, sleeves, hubcaps or inserts attached to or in contact with the axle, body or wheels.
G. Loose objects on car
A. Use only Official Scout Grand Prix wheels.
All lettering/numbering, both inside and outside, must remain complete and be visible. The fluting and other BSA markings on the
outside wheel area must remain visible. Outer wheel surface may be sanded, shaved, or polished to remove surface imperfections,
mold casting burrs, and correct off center wheel bores. Outer wheel surface must not be reshaped in any way in an attempt to
minimize tread contact or alter aerodynamics. Tread surface must be flat and parallel to the wheel bore. Coning the hubs and truing the
inside tread edge is allowed. Tread width may not be less than 7.5 mm. You may add material such as glue, fingernail polish, or tape,
to the inside of the wheel to aid in balancing of the wheel, but no material may be removed from the inside surfaces. Minimum
diameter of wheel is 1.16” to maintain the ridges on the outer edge.
B. Wheel Bore treatment is allowed including polishing and/or tapping. Wheel bores may not be filled and re-drilled to alter bore diameter or to
achieve better fit with the axle.
The following wheel modifications are PROHIBITED:
A. Rounding of tread surface/wheel edges
B. Grooving, H-cutting or V-cutting
C. Altering of wheel profile
D. Narrowing the tread surface, other than truing inside tread edge
E. Drilling sidewalls
F. Hollowing, sanding, or otherwise removing or modifying material from inside the wheel
G. Filling of any wheel surface with any type of materialhere must be at least four wheels on the car, however, it is not required that all four wheels make contact with the track surface.
Each wheel must be mounted on an axle, on the outside of the car, in the vertical position. Each wheel must be attached directly to the wood car
body by an axle and spin freely. No part of the wheel may overlap the center guide rail by more than 1/8 inch. The two rear wheels and the two
front wheels must be positioned directly across the body from each another. Staggered wheelbases are not allowed.
Please note: There are after-market modified wheels that are LIGHTENED. This is usually done by turning the wheels on a lathe and removing
material from the inside of the wheel. These wheels are NOT allowed and EASILY RECOGNIZED at inspection. Cars with these wheels will
not be permitted to race.
No part of the car or any attachment to the car may be capable of coming into contact with the track other than the wheels.
BSA Nail type axles are required with an overall diameter of no less than .084 inches for each wheel. Some polishing and/or modification is
allowed as long as overall diameter is not reduced below .084 requirement.
Grooves are allowed; the depth of the groove(s) is not limited so long as the journal portion of the axle (the part the wheel rides on) is no less
than the stated minimum diameter.
Axles must not be connected to any device that mechanically alters rotation or spin.
Axles must be mounted into the wood sections of car. Drilled holes or slots can be used.
Approved lubricants include (but are not limited to) graphite, Teflon, Nyoil, and Krytox.
Over-application of lubricant which results in excessive shedding onto the track is not allowed.
Each car must pass inspection by the Official Inspection Committee before it may compete. The Inspectors will disqualify any car not meeting
Cars may be reclassified or disqualified if they are determined by the race officials to not meet these requirements.
The drilling/removal of Lead(Pb) will NOT be allowed at the race venues or at check-in time due to the toxicity of the material. PLEASE
avoid Lead(Pb) in cars this year! If you decide to ignore the law* and put Lead(Pb) into a child’s toy, the Lead(Pb) must be completely sealed
and safe from all possible contact with the youth.
Any car losing wheels or any part that prevents it from running cannot be repaired after the inspection and weigh in. EXCEPTION: Race
officials may authorize repairs, usually when damage is caused by collision with another vehicle or object. Ideally repairs can be done before the next heat that the car is in starts. After the car is repaired Officials will run the race again.
GOOD SPORTSMANSHIP AND BEHAVIOR IS EXPECTED. Race Officials may ask anyone not following this rule to leave.