Search found 1368 matches

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: 176

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: 24

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: 176

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: 176

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: 176

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: 176

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 ...
by Speedster
Wed Jan 10, 2018 7:10 am
Forum: Car & Semi-Truck Construction
Topic: Rail Riding Question - indenting RR wheel
Replies: 9
Views: 242

Re: Rail Riding Question - indenting RR wheel

The guide strip measures 1 5/8". The reason for the 1 3/4" clearance is simply so the car will clear the guide strip. In scout racing I think the folks who make the rules are trying to help you and not to look for ways to disqualify you. I suspect the inspector will have some type sample track to se...
by Speedster
Tue Jan 09, 2018 6:22 pm
Forum: Car & Semi-Truck Construction
Topic: Rail Riding Question - indenting RR wheel
Replies: 9
Views: 242

Re: Rail Riding Question - indenting RR wheel

The block measures 1 3/4". Just for an example, I put one of the steel spacers you get with the axle guide behind each of the front wheels and I get a measurement of 1 7/8". You could narrow the distance 1/16" behind the DFW and still have a clearance of 1 3/4". However, if you end up with a distanc...
by Speedster
Fri Jan 05, 2018 1:00 pm
Forum: Car & Semi-Truck Construction
Topic: 2018 Spitfire Mark III
Replies: 24
Views: 882

Re: 2018 Spitfire Mark III

I'd like to see it go down the track too. Anyway you can make a video? It surely is a Beauty.
by Speedster
Fri Jan 05, 2018 12:33 pm
Forum: Car & Semi-Truck Construction
Topic: Graphite vs. Silicone
Replies: 5
Views: 240

Re: Graphite vs. Silicone

The Internet talks about WD-40 and Liquid Wrench. It's claimed they leave a dry film that does not stick or drip. That might be why your rules are allowing silicone.
by Speedster
Fri Jan 05, 2018 6:18 am
Forum: General Topics
Topic: Weighted Wheels
Replies: 9
Views: 417

Re: Weighted Wheels

If by a Flat racer you mean the car resembled a Hershey bar, then the scout might well have gotten a tremendous amount of knowledge out of the build. The scout and his adult helper might well have been on Derbytalk 3 times a day.. The scout might well know all the Physics of the Pinewood Derby and n...
by Speedster
Fri Jan 05, 2018 5:32 am
Forum: General Topics
Topic: Wheel Rub - Wider Stance
Replies: 3
Views: 125

Re: Wheel Rub - Wider Stance

The rear wheels should never touch the wood body. You want them to migrate to the axle heads when the car is rolled forward or rearward. I have been using 1 1/2 degrees of Negative Cant on the rears which gives me the ability to remove any toe, either in or out. The 1 1/2 degree cant just barely all...
by Speedster
Wed Jan 03, 2018 3:16 pm
Forum: General Topics
Topic: Maximum Velocity MV wheel
Replies: 2
Views: 145

Re: Maximum Velocity MV wheel

I really don't know for sure.
by Speedster
Wed Jan 03, 2018 11:26 am
Forum: General Topics
Topic: Maximum Velocity MV wheel
Replies: 2
Views: 145

Maximum Velocity MV wheel

In Maximum Velocity's Newsletter, Volume 11, Issue 8, January 11, 2012, it shows how the MV wheel is made. It's very interesting.

http://www.maximum-velocity.com/nl/pine ... tm#feature
by Speedster
Sat Dec 30, 2017 10:42 am
Forum: General Topics
Topic: Straightening lead rod/basic wedges
Replies: 6
Views: 458

Re: Straightening lead rod/basic wedges

Whoda, thanks for trying to help me. I can get the same amount of wire from Hodges for $4.35 and it comes somewhat straight. Also, I don't pay any sales tax from Hodges. How Hodges sells it so inexpensive I do not know but I'm stocking up on it. If a wedge car is cut correctly the car will end up wi...