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Due to the shape of body, most of the wood weight was toward the rear. They also didn't care about not being fastest. Here are a few tips that will help: - Maximize your allowable weight. Alignment is another area that many racers do not consider, but I would contend it's the most critical aspect of a winning car past the basics of weight and friction. I would strongly not recommend #2 to a Newby for 2 reasons: a) If you don't have 3 consistent perpendicular vertical cuts you can end up with a fairly disjointed looking car and some horrendous alignment problems. You can also glue the weight to the top or bottom of the car. Should I move wheels forward. 4 ounces out of the box. The predrilled axle holes may not be true and straight. Basically, this year's cars must be built from new materials (car body, wheels and axles) found in the official Pinewood Derby kit, however parts of cars, such as weights, from previous years may be reused. Some wood blocks will weigh less than others, so your den's rule is unfair.
Awards will be presented at the completion of all races. I will spare you the math regarding exactly how much extra potential energy you gain with the 2 inch slot in front orientation (i. f * d sin theta, where f = 5 oz, d = 1 inch and theta = angle of incline of the ramp (typically 30 degrees, but depends on the particular model and set up)... oh, yuk). 5... Front or back of pinewood derby car weight. Center of Mass and Balance. Fundamental Rule Number One: The car must weigh exactly 5. This information might be helpful as you plan your car's design because you'll probably want to add additional weight.
Inspection Gauges: The race-day 'Inspection and Registration' area will have the official scale and inspection gauges. The Race Chairman must rule on any issue regarding disqualification from the race. It is reasonable to continue doing what works for you... until you run against someone who does as well the things that you do well, and does a bit better the things you don't. For a fast car, you need to lubricate your car's axles to reduce friction. Some of those cars just flew down the track and I wanted to know how. Most people tend to lean towards the extremes thinking that the only way to be the fastest is to push your advantage as much as possible. The first year was a rude awakening to the reality of Pinewood Derbies. Spend a fair amount of time on axle prep. It is also safe to run about 4/5 of the weight on the rear wheels. Pinewood Derby Weight Placement. Is it OK if an adult helps build a Cub Scout's Pinewood Derby car? A flex weight is a dense, flexible material that can be cut with scissors to the desired shape. Repairs must be completed within 5 minutes. It is hoped that a scout feels pride in his work, enjoys the competition of racing against other scouts, and demonstrates good sportsmanship whether he wins or not.
The last step my son does, is what I call "orienting" the axle to the wheel. Depend on their potential energy at the starting line to give them. EVENT RULES AND PROCEDURES (Ver 2018). Lions, Tigers, Wolves, Bears, Webelos and Arrow of Light will compete with others in their rank. It is up to the Scout Racer (or Parent) to announce that their car has been placed on the track backward BEFORE the race as some cars are hard to determine front from back (we had one car run backward in all of his races in 2018). I have been reading this forum and all the information is very helpful. Much has been written about the physics of pinewood derby cars, and this is one rare case in racing where heavy = fast. Some racers encourage working this area, but personally, as long as there are no obvious imperfections, I would leave them alone. Either way works well. 999 seconds, and the race will be re-staged and re-run without that car. Front or back of pinewood derby car design. Lightly apply the damp cloth the surfaces you just cleaned. But NOT The top of the car – the top of the track.
While my scouts were not too concerned about speed, I was very interested. Final Thoughts on Pinewood Derby Car Weight Placement. Let us know in the comments. Explain to your Scout that running the car along the floor prior to the race will cause it to lose! Update: 3/24/2010 - Add Unequal loss section. Update: 2/18/2010 - Rewrite with cantilevered weight and experiments. The Best Place for Weights on a Pinewood Derby Car. Depending on your pack rules, polishing (or sanding) the business side of the wheel can improve rolling resistance. Drill the hole, place the weight and secure in place with glue if desired. Tundra is formulated with tungsten, so it boasts the same density as lead. The wheels shall be mounted on the Grand Prix axle nails. On the other hand, probably any self-respecting pinewood derby creator knows their wheelbase by heart. Sand the surfaces to be somewhat smooth without removing too much material (surfaces = the bottom of the cavity and the bottom of the car). Height: Car cannot be more than 3 1/8 inches tall.
Acceleration due to gravity is independent of mass. This little trick will help draw the glue into the pores of the wood and make it much stronger than the wood alone. Winning Tips and Hints.
This will reduce friction and increase wheel speed. Short sleeves are recommended. These are the few truths I discovered: - Some dads do all the building of the car and the scout carries the trophy home. The official kit block has pre-cut slots which are correctly spaced. Their velocity as the car travels down the slope and transitions from the slope. Pinewood derby car front or back. If the track were simply a straight slope all the way down to the finish line, you could safely place the weight entirely at the rear of the car. Hub Caps - similar to the Wheel Grinding, but better. Aerodynamics of a block of wood versus a slightly rounded block of wood is miniscule. An authorized agent is defined as a sibling or a Cub Scout who is not already competing in the same Rank competition.
Dropped cars are unfortunately a too common experience. Here is a short video showing alignment of a sample race car. The wheels and axles balance that a bit but the rest I had to do by carefully placing the weights – but you don't have to use tungsten to do it. Before cutting your car, use a straight edge to draw lines down the center lengthwise and widthwise across your car. Viewing it may help the reader understand the following text. They generally cost more, but some people think they are more effective than graphite.
As long as the parent emphasizes that they are participating together and does not take over the project, the derby is great. Note: If a car leaves its lane/track, the Race Officials at their sole discretion may inspect the track and, if a track fault is found which probably caused the initial violation, the Race Officials may order the race heat to be rerun after the track is repaired. After all, there may be a difference between. 1) "Pre-install" the wheels in the back axle slot and measure off the amount of "extra" wood behind the rear wheels. You can also click here for some common Pinewood rules and guidelines. Local Cub Scout packs can schedule their race for any time throughout the year. Dress Code: Competing Scouts are encouraged to be in Class A Uniform.
For many Pinewood Resources, check out my Pinewood Links page. Wings, sails, flags, etc. Joined: Sat Jul 05, 2003 7:01 pm. This spread the weight out.