Anybody build their own 5th wheel?

[dzorde at aesprodata.com.au]

     I know for a fact the bike pick-up works very well at 120mph, as a 
     matter of fact, so does the rest of the bike computer mounted in the 
     race car I run.
     
     Dan        dzorde at aesprodata.com.au


______________________________ Reply Separator _________________________________
Subject: Re: Anybody build their own 5th wheel?
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    6/20/96 10:58 AM


     cut
     
As some people have stated, detecting a spoke at 120+ MPH would be a real 
challenge, and I don't think a magnetic reed switch will activate that fast 
either, although a hall effect sensor might work.  The bicycle speedo 
approach may also work, but they are not really rated for those speeds, and 
you may end up missing pulses.  When was the last time you saw a bicycle 
doing 120 MPH? :]
     
regards
dn