Go to Post We are just helping to keep Home Depot from going Bankrupt :D . - E. Wood [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
 
Thread Tools Rate Thread Display Modes
  #1   Spotlight this post!  
Unread 08-01-2009, 08:39
meaubry meaubry is offline
volunteer helper
FRC #6099 (Knights)
Team Role: Mentor
 
Join Date: Jun 2001
Rookie Year: 1997
Location: Shelby Twp, Mi
Posts: 784
meaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond reputemeaubry has a reputation beyond repute
Re: pic: Traction test

A few thoughts about this -
Given a perfectly level surface and a rigid chassis - how many contact points would there be on the 4 wheels vs 8 wheel? 3 points determine a plane.

So, given that the chassis and wheel assembly might very well flex a bit, and the surface may not be perfectly flat - the # of contact points and the amount of force could vary between the 4 wheel and the 8 wheel.

As stated earlier, the normal force will be divided among the number of contact points - contact points are more relavent in this case than surface area.

I believe the difference that made the 4 wheel win, is due to the 4 wheel having more contact pressure per wheel in contact, and that the gearing reduction caused that machine to slip less than the 8 wheel. I know you indicated that both machine slipped right away, but I don't think that both slipped at the same rate. My guess is that the 4 wheel slipped slightly less.

Just my 2 cents worth,
Looks like you're having fun

Mike Aubry
Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
pic: Test/Training Bot Rob2713g Extra Discussion 9 25-08-2007 15:37
pic: Custom VEX Traction Wheel Rim Chuck Glick Extra Discussion 20 03-10-2006 17:34
pic: 1662's test tranny 5 M4 Sherman Technical Discussion 4 17-06-2006 01:44
pic: 1662 test tranny M4 Sherman Extra Discussion 3 23-05-2006 18:02
Results of traction test IBApril180 Technical Discussion 3 04-01-2003 18:56


All times are GMT -5. The time now is 03:26.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi