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Kub Kar Rally 2017
March 4, 2017 @ 10:00 am - 5:00 pm
START YOUR ENGINES!
Beaver Scouts, Cub Scouts, Scouts, come out to the AREA race to compete against your peers. Win prizes / trophies / ultimate glory! We hope all of our members have a blast with their creations!
Starting this year, we will have an ADULT RACE, which means any Scouters or Parents who would like to make a Kub Kar to both race and show off their woodworking skills are welcome to join us.
Cubs are expected to build their own cars from official Kub Kar kits, available at the Scout Shop. Some adult help is expected, but make sure the Cubs do their own work and understand how to make the best car they can. Don’t use extra or modified parts. This rally is about Cubs having fun!
For tips on how to build winning cars, there is much material on-line; search for “pinewood derby”. A word of caution: There are many on-line shops that sell high performance derby parts, and even completed cars. We don’t allow any of that, and our judges will spot it and disqualify the car.
Use the block of wood from the kit. It is already at the maximum length of 7 inches, and the correct width. Keep in mind that the car rides down a lane with a strip of wood in the middle, which is why the rules specify the distance between the wheels and the ground clearance. Shape and paint the car as you like, and add weight to the car to bring it up to 142 grams if desired (but keep the ground clearance in mind if adding weight to the bottom). Cars generally work best when the point of balance is about 3 cm in front of the rear axle — too far back, and the car will hop off the track and be disqualified.
Use four of the wheels from the kit, and don’t shave, cone, or modify them in any way. Use the nails in the kit as axles, and Cubs should definitely modify these. Remove any burrs, and polish with fine wet/dry sandpaper. An electric drill is useful for this. Lubricate with dry graphite. (Graphite will be provided at the rally as well.) Protip: the car requires 4 wheels, but they don’t all have to touch the track — riding on 3 wheels can be faster! The axles should be straight (but don’t have to be) and the rules don’t require that the pre-cut slots be used. Sometimes, a longer wheelbase can be better. Clearance between the wheels and body of the car should be about the width of a credit card for good results.
All Kars must pass the following inspection to qualify for the race:
- The Kar has never been raced at an Area event before.
- Overall width, including wheels, shall not exceed 7 cm (2¾ inches).
- Length shall not exceed 17.8 cm (7 inches).
- Weight shall not exceed 142 g.
- The minimum distance between the wheels on opposite sides of the kar is 1¾ inches (4.5 cm).
- Clearance between the chassis and the track should be 0.95 cm (3/8ths of an inch).
- Axles, wheels, and body shall be from the materials provided in the kit.
- The Kar must use 4 wheels.
- Wheel bearings, washers, aluminum tape, or bushings are not permitted.
- Shaving, coning, or modifying wheels in any way is not permitted.
- The Kar shall not ride on any kind of spring.
- The Kar must be free-wheeling, with no starting devices.
- No loose materials of any kind are allowed in the Kar.
- No lubricating oil may be used. Axles may, however, be lubricated with powdered graphite lightly by a parent/leader BEFORE RACING BEGINS at the designated graphite station. Once racing begins, further application of graphite is prohibited.
- Once the Kar has been registered and weighed, no modifications will be allowed except to fix Kars that need repairs.