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It starts with DFW toed in (normal) and rear axles badly misaligned. Use your imagination. The following tips tell you the most important pinewood derby car design concepts.
For maximum speed the front and rear of the car must be level with each other. Front or back of pinewood derby car weights. You can also massage powdered graphite into the wheel edge to further reduce friction. Find a long board and mark off a racing lane, about 6 inches across. Where to place the weights in the rear of the car can be a process of trial and error. One area many racers don't consider is the hub of the wheel, where the axle makes contact.
If the wheels are not parallel and perpendicular to each other, they will be in a toe-in or toe-out orientation, or a combination of these two. If the humidity on race night is high, for example, you can benefit from going a little heavier on graphite. The official kit block has pre-cut slots which are correctly spaced. And know the type of track you will run on (wooden versus aluminum, 36′ versus 45′, etc. ) This is accomplished by canting the front wheel at an angle (negative camber) and by turning the wheel slightly (toe in). Front or back of pinewood derby car in the world. Depend on their potential energy at the starting line to give them. That means it falls further and propels the car longer.
Scouts will compete in intra-rank competition. The weights come in various shapes, sizes and materials. Let us know in the comments. Many packs distribute Pinewood Derby kits in December so that Cub Scouts can work on their cars over the holiday break. It ends with the rear axles aligned properly to run the dominant side rear wheel 1/16" off the rail, the other side rear wheel running the same direction, and the drift at 2" in 2'. Feb 07, 2013 - Twila. Pinewood Derby Weights: Best Place for Weight in Pinewood Derby Car. But, really, it's a dumb rule to add to the process because everyone else uses the 5 ounce rule. The official Pinewood Derby car weighs about 3.
Overcoming friction is the job of momentum, which is the force that allows your car to continue rolling as fast as possible on the flat section of the track. Next, after masking off the body's paint, gently massage some dry graphite into the wood. Whatever the weight limit is, you want to be exactly. All four wheels must touch the ground and NOT BE BENT INWARD OR OUTWARD SO AS TO RACE ON THE EDGE OF THE WHEEL. 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'm sharing some of them here. Pinewood Derby Weight Placement. Each pack's official rules are different. As long as the parent emphasizes that they are participating together and does not take over the project, the derby is great. This restriction is due to the finish line height. What is a Pinewood Derby Car and Race and when are they generally held? All of the cars are spotted at the same height on the track, but. That was the first reference to the Pinewood Derby in any BSA publication.
Grinding the ridges off and polishing reduces friction. Line later than the heavier car. These modifications also tend to be outside the skill level of a cub scout. Feb 14, 2014 - Robert. Three Keys to a Fast Car. If such sources are found, correct that defect before trying to complete the alignment. Think of that bit of weight behind the rear axle as your high octane reserve fuel. It can lead to friction/heat which can distort the hub bore and you wind up with a wobbly axle to wheel fit. Before cutting your car, use a straight edge to draw lines down the center lengthwise and widthwise across your car.
Wheels and Axles: Use only Official Grand Prix wheels and axles (including the BSA colored wheel kits). This means the longer you can have the car being pushed forward by the weight falling with gravity – the longer it will stay in motion. The cars are powered only by gravity. Car stability on that track is reportedly best with a centralized CM. Wings, sails, flags, etc. Alternate between the OSRW Adjustment and DSRW Adjustment until two consecutive trials require no adjustment to rear wheel toe. This spread the weight out. For a truly FAST Pinewood Derby car there are three key areas that must be properly aligned, failure to do so..... LEAVES SPEED ON THE TRACK! Roll the car on the alignment board a few times and watch that the DFW stays against the rail. Official weight will be determined on race day only as it can be affected by the weather. Details such as steering wheel, driver, decals, painting, and interior details are permitted and must be firmly attached. That is true, but 2/3 of the. We would cut three pieces of brass rod and trim them to bring the weight to the "just under 5-ounce" point.
Just trim a piece of 2″ wide tape. Pinewood Derby® is a registered trademark of Boy Scouts of America. Opinions vary, but most experts suggest adding as much weight to the back of your car as you can without popping a wheelie. Shape has the least to do with winning. This is another aspect of building a fast derby car that requires a bit of guesswork. The template and straight lines help guide your cutting on both sides of the car so everything is square. In the event of an electronic timing system failure, the race will be rerun once the timing equipment has been fixed.
However, lead is one of the most harmful pinewood derby car weights to handle, and only adults should work with the material. Ask a Question - Add Content. For the typical inclined ramp followed by long flat section track, this extra (free! ) I personally like to drill from the bottom and glue the weights securely in place so I have more options in exactly where each bit of weight is placed. The Pinewood Derby is frequently held in January or February, but there is no official date. I just stumbled across it as I was doing some "casual browsing". Graphite works best after a break-in period, so don't use between races.
It must clear the ground by at least 3/8 inch. Mar 01, 2014 - Paul. Simple physical principles dictate that. Occasionally you will get a block where an axle slot will split when you insert the axle. Both methods work great! Where can I buy Pinewood Derby weights? Last update on 2023-02-28 / Affiliate links / Images from Amazon Product Advertising API. Submission for re-inspection must be made before the registration and inspection period has ended. To eliminate this problem the front axle hole must be placed at a PRECISE amount higher than the rear axle holes ensuring that the rear wheels are not placed in a toe-in or toe-out position. Lube the car at the body/wheel friction point. The screws one at a time until the car passes, and you are assured of being.
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