[archiver]

Posted by Joe Johnson at 1/26/2001 9:18 PM EST


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.


In Reply to: Dr. Joe - What is #47's Drive Ratio-Care to share?
Posted by Glenn M. Krcek on 1/26/2001 4:55 PM EST:



Hi Glenn,

As to sharing exact gear ratios, I am sorry that I am
going to have to pass.

Yes, this year more than ever, teams are sharing
things. But exact ratios are more of a trade secret
that I am not sure everyone should publish.

I have gone out of my way to give rookies guidance as
to the ranges they should be considering because
getting the ratio really wrong can ruin an otherwise
good year, but beyond that I am a little tight lipped.

I will say this, you don't give your wheel diameter,
but at 64 to 1 from the motor the output shafts in low
gear and another 3 to 1 on top of that, even with an 8
inch wheel you will not be setting any speed records
(unless of course you shift your transmissions which is
tricky but possible with good design and good
software). By the way, you will have something like
150 lbs available per motorized wheel at this ratio and
the 8 inch wheel. You will have a difficult time
getting that much tractiion on the carpet (imho).

Sorry for the non-answer. Good luck just the same.

Joe J.