Search found 1483 matches

by Speedster
Fri Apr 20, 2018 7:55 pm
Forum: General Topics
Topic: SubaDerby speed winner
Replies: 2
Views: 87

Re: SubaDerby speed winner

Thank You.
by Speedster
Thu Apr 19, 2018 9:18 am
Forum: General Topics
Topic: SubaDerby speed winner
Replies: 2
Views: 87

SubaDerby speed winner

Anyone have a picture of the car that won the speed race?
by Speedster
Wed Apr 18, 2018 11:24 am
Forum: General Topics
Topic: BSA axle ridges
Replies: 5
Views: 150

Re: BSA axle ridges

All 26 of Doc Jobe's lectures can be viewed by going to Hodges Hobby House, Home Page, the paragraph is in yellow.
by Speedster
Wed Apr 18, 2018 9:36 am
Forum: General Topics
Topic: BSA axle ridges
Replies: 5
Views: 150

Re: BSA axle ridges

This is a good Physics lesson. Setting up the nail/wheel bore as suggested does not reduce friction, it simply moves the friction to a smaller area. A downside, It might wear out the graphite sooner. The same is true by cutting a groove in the axle. It does not reduce friction. A possible benefit of...
by Speedster
Mon Apr 16, 2018 10:14 am
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

MJ, to answer your 1st question. The Laws of Physics were followed more closely by the faster car whether it was intentional or by accident. I have a 3 wheel rail rider, left front wheel raised, back wheels set at 1 1/2 degrees Negative camber. Both back wheels migrate to axle heads while rolling th...
by Speedster
Sat Apr 14, 2018 12:09 pm
Forum: Trading Post
Topic: Looking for Old Derby Magic Single Lane Track
Replies: 3
Views: 171

Re: Looking for Old Derby Magic Single Lane Track

You might want to put this in Derbytalk's Trading Post. That is probably frequently visited. I'm just curious. How long is the track and do you have a timer for it? If the track is around 30 feet long you'll be in good shape. If a car is fast at the 30 foot length it probably will be fast at the 36 ...
by Speedster
Sat Apr 14, 2018 9:47 am
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

MJ, I think we're dealing with too many things at once. Going back to your Topic. Testing a car on a Center guided track is not what you want to do on a lane track. There would be no reason to narrow the car body 1/16" behind the Dfw if you are running on a lane track. Your 2 cars are different in e...
by Speedster
Fri Apr 13, 2018 1:20 pm
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

MJ, that is correct. If the nail is off the tiniest bit the wheel is going to have toe in or out. That's not desirable. However, when you're moving to the other track, if you're guiding the car to the right, the right rear wheel must not touch the right side guide. Narrowing the right rear side of t...
by Speedster
Fri Apr 13, 2018 4:40 am
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

Regarding #5. I suspect the back wheels are causing this if you still have them set with Positive camber. Let's back up for a minute. Take the front wheels off one of the cars. Set the back wheels with the 2 1/2 degrees of Negative camber. I'm going to assume you got the 2 1/2 degrees by bending the...
by Speedster
Fri Apr 13, 2018 4:09 am
Forum: Car & Semi-Truck Construction
Topic: Vintage Semi Truck.
Replies: 5
Views: 270

Re: Vintage Semi Truck.

Looks GOOD to me !
by Speedster
Wed Apr 11, 2018 9:39 am
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

Think hard. Your goal is to decrease Friction. Setting up a basic rail rider, only the very bottom inside of the Dfw (dominant front wheel) ever touches the guide strip. One front wheel is raised to save "Rotational Energy". If the car is set up to run the raised wheel into the side rail you have in...
by Speedster
Tue Apr 10, 2018 5:50 pm
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a guided track,when racing on a lane track

MJ, I'm not following your last post. A raised wheel should never touch anything. Only the Dfw should ever touch the guide strip. Depending on what your rules allow, it might be wise to build a Hershey bar car, set the balance point 1/2" in front of the rear axle slot, and do a Super job on axles an...
by Speedster
Tue Apr 10, 2018 12:02 pm
Forum: Car & Semi-Truck Construction
Topic: Testing your car on a guided track,when racing on a lane track
Replies: 35
Views: 635

Re: Testing your car on a rail track,when racing on a lane track

Up in the top right corner it says "Search". I would keep searching, using different worded questions, to see what different racers have to say. Those tracks are not very popular but if you find one expert you'll be way ahead of the game.
Best Wishes.
by Speedster
Mon Apr 09, 2018 2:46 pm
Forum: General Topics
Topic: Track material vs. track length vs. speed
Replies: 12
Views: 2241

Re: Track material vs. track length vs. speed

Gramps, You can probably get in this years Mid America race and you're going to find out what it will do. I'm sure they have a scout class for the car and also an Adult class so it can be run somewhere following your rules. Don't change anything on the car. You can mail it in and watch the race on y...