Search found 6835 matches

by Stan Pope
Thu Mar 10, 2016 11:15 pm
Forum: Car & Semi-Truck Construction
Topic: How long do your wheels spin?
Replies: 20
Views: 22515

Re: How long do your wheels spin?

It is probably a lot like silicone spray which is reported to be excellent ... for a few heats, but wears off quickly.
by Stan Pope
Tue Mar 08, 2016 4:58 pm
Forum: Car & Semi-Truck Construction
Topic: Cant on DFW
Replies: 13
Views: 13432

Re: Cant on DFW

The effect of raising the front end by 0.05" (if the wheelbase is 5") is less than 0.6 degrees. I think that few people would be able to twist an axle in increments of 0.6 degrees or less! Depending on the bend in the rear axle, the change in the angle between the axle and the car path fro...
by Stan Pope
Sun Mar 06, 2016 7:57 pm
Forum: Car & Semi-Truck Construction
Topic: How long do your wheels spin?
Replies: 20
Views: 22515

Re: How long do your wheels spin?

Spray it on, and wipe it off. Leaves a thin, slick film on your wheel bore and/or axle. As I understand, it is a "dry" film, just as would be left on a finished wood surface that your mother treated with Lemon Pledge! Being dry, it should cause no issues with rules and not affect graphite ...
by Stan Pope
Sun Mar 06, 2016 12:03 pm
Forum: Car & Semi-Truck Construction
Topic: Straight running car
Replies: 15
Views: 20530

Re: Straight running car

... Even with the steer trimmed way down to a usable 3" in 4' (done post video), the rear wheel stayed off the rail just the same. I know we can't steer, but my thinking is that If/when the car does eventually make contact with side rail, the rear wheels won't. On a regular 4 wheel car, I woul...
by Stan Pope
Sat Mar 05, 2016 4:08 pm
Forum: Car & Semi-Truck Construction
Topic: Cant on DFW
Replies: 13
Views: 13432

Re: Cant on DFW

Vitamin K wrote:...
At least, that's my theory. ;)
A very good theory! :)
by Stan Pope
Fri Mar 04, 2016 4:57 pm
Forum: Car & Semi-Truck Construction
Topic: First attempt at a ladder chassis...
Replies: 22
Views: 36757

Re: First attempt at a ladder chassis...

I've raced very nicely with side rails that thin (and missing the middle cross piece) with nothing covering 'em to give them strength. Since I think that you will be reinforcing with some kind of covering, you should do great! If anything, you may find that the front end is lighter than you want.
by Stan Pope
Fri Mar 04, 2016 1:11 pm
Forum: Car & Semi-Truck Construction
Topic: First attempt at a ladder chassis...
Replies: 22
Views: 36757

Re: First attempt at a ladder chassis...

There's still an awful lot of wood left in there! :)
by Stan Pope
Fri Mar 04, 2016 1:09 pm
Forum: Car & Semi-Truck Construction
Topic: Straight running car
Replies: 15
Views: 20530

Re: Straight running car

So ur suggesting 2.5 negative camber on all 3 wheels?? "Inside the envelope"???? The car is done so narrowing the rear is not going to happen. The holes are drilled. With one raised. I can achieve the negative camber by bending the axel?? By "inside the envelope" I mean that the...
by Stan Pope
Fri Mar 04, 2016 1:45 am
Forum: Car & Semi-Truck Construction
Topic: Straight running car
Replies: 15
Views: 20530

Re: Straight running car

Here are the critical issues as I understand them: 1. Narrow the rear (both sides) to assure that they do not contact the track edges. 2. Use negative camber on rears to ride on a narrow wheel edge (known to be faster than running on wider flat tread.) 3. Align the rears to (a) run parallel tracks a...
by Stan Pope
Mon Feb 29, 2016 2:27 am
Forum: Car & Semi-Truck Construction
Topic: How to secure DFW axle?
Replies: 16
Views: 22896

Re: How to secure DFW axle?

Speedster wrote:We must use slots. We are not allowed to cut a slot in the axle head so I am forced to leave just enough room to grip the DFW with the special pliers.
See if you can find another way to twist those axles whose necessarily pristine heads are way down in the wheel hub!
by Stan Pope
Thu Feb 25, 2016 11:12 pm
Forum: General Topics
Topic: Thoughts on rule interpretation....
Replies: 15
Views: 17580

Re: Thoughts on rule interpretation....

Even if the organizer insists that "axle holes" means "original slots", sectioning the block and repositioning the sections that contain the slots leaves the result in compliance. I was talking about using the kit issued for the race.. and turning it into a 56-77 kit style car. ...
by Stan Pope
Thu Feb 25, 2016 6:54 pm
Forum: General Topics
Topic: Thoughts on rule interpretation....
Replies: 15
Views: 17580

Re: Thoughts on rule interpretation....

Well, rule 4 explicitly allow changing the wheelbase. ("Modifying the wheel base is acceptable as long the original wood is used for the axle holes.") Even if the organizer insists that "axle holes" means "original slots", sectioning the block and repositioning the sec...
by Stan Pope
Thu Feb 25, 2016 2:07 pm
Forum: General Topics
Topic: Thoughts on rule interpretation....
Replies: 15
Views: 17580

Re: Thoughts on rule interpretation....

Well, rule 4 explicitly allow changing the wheelbase. ("Modifying the wheel base is acceptable as long the original wood is used for the axle holes.") Even if the organizer insists that "axle holes" means "original slots", sectioning the block and repositioning the sect...
by Stan Pope
Thu Feb 25, 2016 1:01 pm
Forum: Car & Semi-Truck Construction
Topic: Need definition of COG and COM.
Replies: 6
Views: 8429

Re: Need definition of COG and COM.

You will also see occasional use of CM, CMx, CMy, CMz, CMloc, etc. In a PWD context, the reference (0 in the coordinate system) is usually the center of the rear axle, with the x-axis extending through the front axle and y-axis across the car in the axle plane. Some folks worry about the z-axis loca...