Search found 6835 matches

by Stan Pope
Tue Jan 26, 2016 10:53 am
Forum: Car & Semi-Truck Construction
Topic: Plans for a Hot Rod Car
Replies: 30
Views: 33323

Re: Plans for a new car

The lowered sides need to be clear of the sides of the rail so that it does not drag on the side of the rail. This usually means that they need to be outside of the inner edges of the wheel treads.

Otherwise, nice job ... really nice job!
by Stan Pope
Tue Jan 26, 2016 9:49 am
Forum: Car & Semi-Truck Construction
Topic: weight advice---pic
Replies: 23
Views: 25835

Re: weight advice---pic

If, in fact your CM's are/were 0.62". Measuring CM by balancing is difficult and more error prone than measuring by weighing and calculating. I would consider wheel weights as "barbell" only in the side-to-side CM location (CMy). CMy has small role in the apparent lightness of the fr...
by Stan Pope
Tue Jan 26, 2016 8:58 am
Forum: Car & Semi-Truck Construction
Topic: weight advice---pic
Replies: 23
Views: 25835

Re: weight advice---pic

Differences between cars with identical CM but different arrangements are "lost in the noise." I've heard of no one who has produced experimental results that "barbell" weighting is inferior to "concentrated" weighting. Nonetheless, I would concentrate ballast to the e...
by Stan Pope
Tue Jan 26, 2016 3:52 am
Forum: Car & Semi-Truck Construction
Topic: weight advice---pic
Replies: 23
Views: 25835

Re: weight advice---pic

Differences between cars with identical CM but different arrangements are "lost in the noise." I've heard of no one who has produced experimental results that "barbell" weighting is inferior to "concentrated" weighting. Nonetheless, I would concentrate ballast to the ex...
by Stan Pope
Tue Jan 26, 2016 3:34 am
Forum: Car & Semi-Truck Construction
Topic: Minor weight question...
Replies: 21
Views: 24242

Re: Minor weight question...

Major flaw in that it allows the two fastest cars to race the second time prior to the "final". Easy fix: Label 4 buckets Run, 0, 1 and Out. Collect number slips into bucket 0 (0 losses). Round 1: Empty bucket 0 into bucket Run. Proceed as before from bucket "Run" except that eac...
by Stan Pope
Mon Jan 25, 2016 2:50 am
Forum: Car & Semi-Truck Construction
Topic: Minor weight question...
Replies: 21
Views: 24242

Re: Minor weight question...

Last year at District, he would've had a solid 2nd place finish, but as chance would have it, he had to face the eventual winner twice in early competition (2 lane track, double elimination based on random draw per round), and both races were "too close to call" with the eye, and he was &...
by Stan Pope
Mon Jan 25, 2016 2:37 am
Forum: Car & Semi-Truck Construction
Topic: weight advice---pic
Replies: 23
Views: 25835

Re: weight advice---pic

spring clips, commercial or home made.
by Stan Pope
Wed Jan 20, 2016 1:21 am
Forum: Car & Semi-Truck Construction
Topic: Minor weight question...
Replies: 21
Views: 24242

Re: Minor weight question...

Which kinda sucks, because if he does good, we go to the district track, that is long arc/drop & short straight with center rail and no side rails. Won pack races, but never better than 3rd on the district track. Okay, you already know how to do well on your pack track. Let's focus on the distr...
by Stan Pope
Mon Jan 18, 2016 8:53 pm
Forum: Car & Semi-Truck Construction
Topic: Opinions Wanted: Critique my Rail-riding explanation
Replies: 15
Views: 22408

Re: Opinions Wanted: Critique my Rail-riding explanation

Hey - question for you guys on rail riding. Why such a huge drift? I've been reading on RR and most are saying 3-5" over 8 feet. Thats huge, basically as soon as it leave the block it runs into the rail I'd think at that amount. Why not like .5" over 8 feet so it has time to build up spee...
by Stan Pope
Mon Jan 18, 2016 8:36 pm
Forum: Car & Semi-Truck Construction
Topic: Minor weight question...
Replies: 21
Views: 24242

Re: Minor weight question...

Most builders report that extreme rear weighting performs better on short tracks (28'-32') than on longer tracks (38'-48'). I understand that this is a trade-off between initial velocity on short tracks and DFW friction on the longer tracks. The cause for DFW friction is that greater toe-in is neede...
by Stan Pope
Tue Nov 17, 2015 11:46 pm
Forum: Scheduling Methods
Topic: Sutton excel spread sheet
Replies: 7
Views: 20661

Re: Sutton excel spread sheet

Thanks ... Firefox on a 10+/- year old Power PC ... shoulda run! But doesn't.

Is it worth it to you to spend any time diagnosing/fixing? If so, click the "diagnostic" box, rerun your case, and email the resulting web pages along to me.
by Stan Pope
Mon Nov 16, 2015 12:22 am
Forum: Scheduling Methods
Topic: Sutton excel spread sheet
Replies: 7
Views: 20661

Re: Sutton excel spread sheet

... and using the Young / Pope Partial Perfect-N scheduling (thanks for making that available, even if I did have to boot up an old PC to access it). :) Hmmm ... should run on all reasonably modern platforms if you allow the javascript to open extra windows (pop-ups). (Chrome users take note) Even ...
by Stan Pope
Fri Oct 16, 2015 9:40 pm
Forum: General Topics
Topic: Outlaw Derby
Replies: 2
Views: 5371

Re: Outlaw Derby

Think about the likely participants ... how "hard core" are they? Do you want to allow other than BSA wheels? There are some fantastic, really low inertia wheels that can be made or bought. What about hubs and axles? Will you allow roller bearings and/or needle axles? Do you allow "no...
by Stan Pope
Sat Sep 26, 2015 12:08 am
Forum: Car & Semi-Truck Construction
Topic: Mass-Producing Lead Weights for Scout Use?
Replies: 34
Views: 37835

Re: Mass-Producing Lead Weights for Scout Use?

A relatively easy and long lasting mold can be made from two 2' of 2"X1/4" structural steel angle iron. 1. Place together to form a T when viewed from an end; 2. Clamp together; 3. Near each end, drill 1/4" holes and bolt the T together; 4. At each corner of the top of the T, drill a ...
by Stan Pope
Sat Aug 22, 2015 12:54 am
Forum: Software
Topic: Which one?
Replies: 9
Views: 15281

Re: Which one?

Elimination racing is in the class of "adaptive scheduling" which does not lend itself to a high degree of "lane and opponent equity." The best (I think) that can be done there is to insert a degree of randomness plus a follow-on attempt to achieve some degree of equity. For a fi...