What are your rules?
Do they require, or imply the requirement, that every car be exactly 7 inches long?
Search found 53 matches
- Wed Feb 05, 2014 9:30 pm
- Forum: General Coordinator Topics
- Topic: Have you seen issues with fixed axle location rules?
- Replies: 13
- Views: 30467
- Sat Jan 18, 2014 2:02 pm
- Forum: General Topics
- Topic: District Best Design-No Awards
- Replies: 8
- Views: 11052
Re: District Best Design-No Awards
Our district has two design awards: "Best Design" and "Most Unique". The winners are chosen by volunteer judges. Those at district will have won first place in that category at their pack race. Those racing (competing for speed awards) are not eligible for design awards, and vice...
- Mon Jan 13, 2014 3:06 pm
- Forum: General Coordinator Topics
- Topic: Question regarding wheel mod-eliminating round bump molds
- Replies: 13
- Views: 20590
Re: Question regarding wheel mod-eliminating round bump mold
The rule: "Wheels may be lightly sanded to remove mold projection" was probably violated if the wheel was sanded to the point that the little dots around the circumference (I think of them as faux tread) have been removed. My district and pack has the same rule. I believe it was written pr...
- Sun Jan 12, 2014 1:42 pm
- Forum: General Coordinator Topics
- Topic: Registration tonight - suspect car / notched raised wheel
- Replies: 12
- Views: 19431
Re: Registration tonight - suspect car / notched raised whee
How much does the modified wheel weigh? I think it looks like an attempt to lighten the wheels.
The body looks like the Grand Prix from abc pinewood derby.
The body looks like the Grand Prix from abc pinewood derby.
- Mon Dec 30, 2013 7:05 pm
- Forum: Car & Semi-Truck Construction
- Topic: Help selecting straight BSA axles?
- Replies: 4
- Views: 5176
Re: Help selecting straight BSA axles?
Think about the extreme case: if you have an axle with a 45 degree bend, chuck it, and spin it you'll see a cone shape.
If you have a perfectly straight axle, chuck it, and spin it, you'll still see a "nail shape".
Look for axles with no cone.
If you have a perfectly straight axle, chuck it, and spin it, you'll still see a "nail shape".
Look for axles with no cone.
- Thu Jan 10, 2013 11:44 am
- Forum: Car & Semi-Truck Construction
- Topic: Weights in a very thin car
- Replies: 11
- Views: 14731
Re: Weights in a very thin car
The design you pointed to specifies the location of the weights.
They've drawn 12 quarter-inch cubes behind the rear axle and 18 quarter-inch cubs in front the rear axle.
If you did that, the car would not pop a wheelie.
Are your rear axles as drawn on the design (one inch from the back)?
They've drawn 12 quarter-inch cubes behind the rear axle and 18 quarter-inch cubs in front the rear axle.
If you did that, the car would not pop a wheelie.
Are your rear axles as drawn on the design (one inch from the back)?
- Wed Jan 09, 2013 12:54 pm
- Forum: General Coordinator Topics
- Topic: Axles in Revell Kits
- Replies: 15
- Views: 23226
Re: Axles in Revell Kits
and both Revell and the BSA original qualify as 'Official BSA' axles, right? It depends on the rules from your Pack or District. They would be illegal in our Pack and District races. The Revell wheels and axels are "officially licensed". The scout shop versions are "official".
- Mon Jan 07, 2013 10:58 am
- Forum: Car & Semi-Truck Construction
- Topic: Homemade Concentricity Gauge
- Replies: 37
- Views: 61280
Re: Homemade Concentricity Gauge
I'll share our results too. My son ran out of steam after testing just 18 from a big rig kit. We got a good set of four, and still have extra wheels to measure for next year. Of our 18, five had smaller bores (.0965), while the rest were .0970). Interestingly, the small bores were all #11 and #6 mol...
- Wed Jan 02, 2013 7:00 am
- Forum: Car & Semi-Truck Construction
- Topic: Mold #s on the wheels?
- Replies: 19
- Views: 16447
Re: Mold #s on the wheels?
Our plan is to find the best set, and run them in modified. We will only polish and burnish the bore. I have low confidence that with our current tools and skill that we'll be able to improve a wheel. I do have a mandrel and a drill press, maybe we'ill practice on a few and measure our results. Shou...
- Tue Jan 01, 2013 10:05 pm
- Forum: Car & Semi-Truck Construction
- Topic: Mold #s on the wheels?
- Replies: 19
- Views: 16447
Re: Mold #s on the wheels?
For this season, I've collected 48 wheels. I've built a concentricity gage per FS's directions at http://www.derbytalk.com/viewtopic.php?f=11&t=6655&hilit=concentricity#p63852 I just ordered a set of four gage pins: 0.0955 through 0.0970. What process should my son use to go through these wh...
- Sun Dec 09, 2012 10:20 pm
- Forum: General Car/Truck Racer Topics
- Topic: Using slots rule question
- Replies: 17
- Views: 16567
Re: Using slots rule question
What would I do? -- Drill my own axle holes. If you want to optimize speed, you would only drill your own axle holes if you think your can improve upon the slots. If you have a drill press or other tool that can make holes or slots that are "more square" than the pre-cut slots, then you ha...
- Mon Dec 03, 2012 6:39 pm
- Forum: General Coordinator Topics
- Topic: Pinewood Derby Rules
- Replies: 60
- Views: 65192
Re: Pinewood Derby Rules
Our rules specify to use the "block from the kit". We allow replacement wheels, but only "from the scout store". These would both rule out the Revel kits. A Revel wheel (from a kit or tube) can be easily differentiated from a BSA wheel. Revel's are stamped "Made in China&quo...
- Thu Nov 29, 2012 9:56 am
- Forum: Car & Semi-Truck Construction
- Topic: Sanding treads with mandrel and sanding block
- Replies: 41
- Views: 27512
Re: Sanding treads with mandrel and sanding block
I found some Big Rig kits on clearance at the scout store this year, so my son and I have a 36 wheels to sort through. Is picking out matching mold numbers (looking for the documented higher quality numbers) a close enough proxy to taking the measurements mentioned above? Does anyone have additional...
- Tue Nov 20, 2012 6:54 pm
- Forum: General Car/Truck Racer Topics
- Topic: This years BSA wheels look like a regression
- Replies: 9
- Views: 9901
Re: This years BSA wheels look like a regression
We got our kits tonight. They are identical to last year's kits. The box is decorated like a present. Like last year, above the UPC symbol is written Item #17000. Our box from last year was stamped with "IN0911". I assume manufactured in September 2011. Our box from this year is stamped wi...
- Wed Nov 07, 2012 1:34 pm
- Forum: General Car/Truck Racer Topics
- Topic: This years BSA wheels look like a regression
- Replies: 9
- Views: 9901
Re: This years BSA wheels look like a regression
Has anyone picked up a kit at the scout shop this year? Last year, tubes of wheels purchased at hobby shops were the Revell wheels, while tubes of wheels purchased at the scout shop were still the "good ones". I hope these new Revell kits stay in the hobby shops, and that the kits at the s...