View Full Version : Deceleration of bikes!

Heinz-bodo Schmiedmayer
12-02-1991, 05:31 PM
Dear BIOMCH-L Readers!

Two years ago my younger brother had an accident with his bike
caused by a car. The insurance company stated now that he was to fast
with his bike, otherwise he should have been able to stop before
crashing into the car. The company said that the bike can decelerate
with a rate of 5 m/sec^2. I did some theoretical investigations
yesterday and found out, that the theoretical rate deceleration is not
limited by the friction between street and tyre but by the geometrical
position of the centre of gravity. The maximum deceleration is limited
by tipping over the front wheel. In this special instance the maximum
rate of deceleration is 4 m/sec^2.

Now comes my question to the biomch-l comunity:

"Does anybody out there know about measurements on maximum
rates for decelerations of bicycles?"

If you have such information, please contact me via email.

Thank you very much in advance.

(Univ.-Ass. Dipl.-Ing.)

Institut fuer Mechanik; TU-Wien Fax.: (++43 1) 587 5863
Wiedner-Hauptstrasse 8-10/3251 Tel.: (++43 1) 58 801 - 5524
1040 WIEN - AUSTRIA E-Mail: bodo @ mch1ws1.tuwien.ac.at