Thread View: net.auto.tech
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Started by Jan Prins
Tue, 25 Feb 1986 01:59
car physics references?
Author: Jan Prins
Date: Tue, 25 Feb 1986 01:59
Date: Tue, 25 Feb 1986 01:59
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A friend and I are looking for quantitative treatments of automotive
physics. We're particularly looking for analyses of suspension, chassis
and tire adhesion.
We would like to build mathematical models of automotive performance and
need accounts of the very specialized physics involved. As an example,
the time-to-speed and time-to-distance curves for a car can be calculated
from the full-power torque curve of the motor, the gearing and efficiency
of the transmission and final drive, the coefficient of drag times frontal
area, the mass of the car plus payload and the rolling radius of the tires.
The calculated figures are not exact predictors of actual performance
(although they can be very close) but provide a consistent model on which
to evaluate changes.
With more understanding of tire and suspension dynamics we might be able
to estimate skidpad and braking performance or predict wheelspin.
The university library holdings concentrate on automobile safety and engine
pollution/efficiency. But judging from postings in this newsgroup, there
is some interest and expertise in the formal treatment of performance. If
you have any pointers or references to the literature, please mail them to
me. I will collect them and post the aggregate in three weeks for others
interested.
Jan Prins [ARPA] prins@cornell
Dept. of Comp. Sci. or prins@svax.cs.cornell.edu
Upson Hall [uucp] {vax135,ihnp4}!cornell!prins
Cornell University [Csnet] prins@cornell
Ithaca, N.Y. 14853 [Bitnet] prins@CRNLCS
Re: car physics references?
Author: Phil Ngai
Date: Sun, 02 Mar 1986 05:55
Date: Sun, 02 Mar 1986 05:55
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"Racing Car Design and Development", by Terry and Baker, reads almost
like an autobiography in places but is worth reading.
"The Sports Car, its design and performance", by Colin Campbell, is
probably more what you are looking for. Lots of good technical details.
I had heard Campbell also wrote a book called "New directions in
suspension design" but never found it. All these books are published
by Robert Bentley, Inc, Cambridge, MA.
Any other suggestions?
--
The Hyundai is faster than speeding molasses!
Phil Ngai +1 408 749 5720
UUCP: {ucbvax,decwrl,ihnp4,allegra}!amdcad!phil
ARPA: amdcad!phil@decwrl.dec.com
Re: Orphaned Response
Author: spitzer
Date: Thu, 13 Mar 1986 03:27
Date: Thu, 13 Mar 1986 03:27
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.. I've had some success building a "toy" expert system to deal with INCREDIBLY SIMPLIFIED suspensions by starting with the book: How To Make Your Car Handle Fred Puhn HPBooks; Tucson, AZ This stuff is not easily modeled in the real world ... I've seen new bushings and a (same size but) harder steel roll bar make a .1 g difference on the skidpad. It took Mazda years to understand the 86 RX7 back end..Mercedes more for their 5 link suspension. There are some very big computers in Detroit chewing on the problem. Good luck.
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