Search found 1377 matches

by Speedster
Mon Jan 22, 2018 2:30 pm
Forum: Car & Semi-Truck Construction
Topic: Weight placement, cog question
Replies: 1
Views: 33

Re: Weight placement, cog question

That's a really good question. There's a lot of variables. There will always be some weight on the dfw but How Much would depend on the design of the car. Our basically stock wedge car will handle the Best track with a 3/4" CG. I always end up increasing the toe-in after tuning the car on the Best t...
by Speedster
Mon Jan 22, 2018 2:19 pm
Forum: General Car/Truck Racer Topics
Topic: first pinewood derby experience
Replies: 3
Views: 44

Re: first pinewood derby experience

I suspect all rules will allow you to polish the wheel bores. The common product is Novus 2 and a fluffy pipe cleaner, or a Walgreens paper cotton swab shaft, or other things sold by the vendors. Polishing the bores will benefit your team. Remember, the nail does not turn. I'm well aware many folks ...
by Speedster
Mon Jan 22, 2018 4:59 am
Forum: General Car/Truck Racer Topics
Topic: first pinewood derby experience
Replies: 3
Views: 44

Re: first pinewood derby experience

Welcome to Derbytalk.
Beautiful car. I know science was used to build it. I do have one question. What did you use to polish the bores?
by Speedster
Sun Jan 21, 2018 3:41 am
Forum: General Topics
Topic: Compairing BSA World Speed times
Replies: 10
Views: 1142

Re: Compairing BSA World Speed times

After you tuned it, how much did it drift in 4'?
by Speedster
Fri Jan 19, 2018 2:05 pm
Forum: General Topics
Topic: Wheels
Replies: 4
Views: 146

Re: Wheels

Good One, Vitamin K. Wish I'd thought of it.
by Speedster
Fri Jan 19, 2018 5:39 am
Forum: General Topics
Topic: Wheels
Replies: 4
Views: 146

Re: Wheels

HOLY SMOKE, jkidd, you live in Toledo, Ohio. Welcome to Derbytalk. I probably have your rules if you're in the Cub Scouts or Girl Scouts.
email me.
by Speedster
Thu Jan 18, 2018 5:44 am
Forum: Car & Semi-Truck Construction
Topic: Advise me on using slots. :)
Replies: 7
Views: 275

Re: Advise me on using slots. :)

Vitamin K, I have a thought. OK, don't stop reading. It's not dangerous. Your buddy is allowed to run on 3 wheels and that's a big plus. He doesn't need any Derbyworx tools to bend the nails. This is where "Build a Winning Pinewood Derby Car" book comes in handy. The book tells you how to do it with...
by Speedster
Wed Jan 17, 2018 6:20 pm
Forum: Car & Semi-Truck Construction
Topic: Advise me on using slots. :)
Replies: 7
Views: 275

Re: Advise me on using slots. :)

I've been using slots for 33 years and they have served us well. You can use the Max-V 5140 Pro-Body tool 2 if you like but I never do anymore. I clamp the Max-V 5149 Pro Axle Guide to the slot. I lightly grind a BSA nail where the point ends to remove any extra wide area and cut off the head. Put t...
by Speedster
Tue Jan 16, 2018 7:17 am
Forum: Car & Semi-Truck Construction
Topic: Rail riding with wafers?
Replies: 4
Views: 189

Re: Rail riding with wafers?

This is interesting. My good friend built one of these cars and he would always beat my Mid America car by about an inch. His car weighed 5 ounces and he ran the wheels straight up and down. He raced the car in several different races and the car was never beaten. Our Pack leader also built one of t...
by Speedster
Mon Jan 15, 2018 5:01 am
Forum: Car & Semi-Truck Construction
Topic: Rail Riding - relationship between COM and drift
Replies: 10
Views: 265

Re: Rail Riding - relationship between COM and drift

Andre, I'm not sure what is meant by a "rough" wood track. If the Guide Strip is really rough then perhaps a more aggressive drift might help to keep it on the rail. We raced on a Piantedosi track up until two years ago when we acquired a Best track. The way that track was designed and the type wood...
by Speedster
Sun Jan 14, 2018 6:03 am
Forum: General Topics
Topic: Pro-Axle Guide steel gauge
Replies: 0
Views: 86

Pro-Axle Guide steel gauge

I've purchased several 5149 Pro-Axle Guides from Maximum Velocity for use in our workshops. It's a Great tool. The tool has a steel piece screwed on one side of the block that is intended to be used as a gap gauge. The inner wheel hub can easily be damaged by that steel piece. I have removed all the...
by Speedster
Sun Jan 14, 2018 4:45 am
Forum: Car & Semi-Truck Construction
Topic: Rail Riding - relationship between COM and drift
Replies: 10
Views: 265

Re: Rail Riding - relationship between COM and drift

The Piantedosi is a beautiful track. If you have an opportunity to help set it up you will be able to check the joints. Hopefully someone will run some cars down the track before the actual race. Your rail rider would make an excellent Test car if you're allowed to do it.
by Speedster
Sat Jan 13, 2018 8:55 pm
Forum: Car & Semi-Truck Construction
Topic: Rail Riding - relationship between COM and drift
Replies: 10
Views: 265

Re: Rail Riding - relationship between COM and drift

Sorry for the confusion. My tuning board is 6" wide. The car is originally set to drift 2" in 4'. After tuning on the track the car then drifts 2" in 3'. The axle is then glued in and we go racing. We have been very fortunate to win many 1st place finishes and never worse then 3rd. This year my spec...
by Speedster
Sat Jan 13, 2018 7:06 am
Forum: Car & Semi-Truck Construction
Topic: Rail Riding - relationship between COM and drift
Replies: 10
Views: 265

Re: Rail Riding - relationship between COM and drift

Andre, here has been our experience for many years. We always use the exact same model every year. It is a basic simple wedge cut to look a little bit fancy in order to remove as much wood as possible. The CG is always set at 3/4" using tungsten cylinders. 1 1/2 ounces are behind the rear axle slot....
by Speedster
Fri Jan 12, 2018 9:51 am
Forum: Car & Semi-Truck Construction
Topic: Rail Riding - relationship between COM and drift
Replies: 10
Views: 265

Re: Rail Riding - relationship between COM and drift

That is a fascinating question? If someone has 3 identical scales, you might weigh the 3 wheels on the ground, perhaps using tungsten putty to shift the weight, and shift the weight from 1 1/4" COG to 3/4" COG leaving the drift the same. Then reset the drift and see if there is a gain, loss, or the ...