If you wanted to go wireless on the cheap, you could require each carto have
their own transponders. A computer would take care ofidentifying 500 different
freqs...... And all of this could be set uplong prior to the meet, with only
the "new" transponders with car infohaving to be entered at the time of the
meet. As for accuracy, if itsgood enough for F1, IRL, SCCA etc,.......... As
for reliability, thetower could "read" the car on the start line, if they
didn't get asignal, it would probably be a dead battery in the transponder
(Commonroad-racing driver error) and you could give them the option of
gettingout of line to fix the transponder or run with no time. If they
can'tfix their unit, sell 'em another! This could be another profit centerfor
SCTA/BNI.
Ed
-----Original Message-----
From: Ellen Wilkinson [mailto:gary_ellen@msn.com]
Sent: Friday, October 13, 2006 12:58 PM
To: 'Jon Wennerberg', 'MEIERLE Mike'
Cc: land-speed@autox.team.net
Subject: Re: Timing light wires
Accurate, certifiable, timing is the important thing. Wire labor is an
inconvenience. Nobody wants to go wireless any more than those of us involved
with wire laydown, pickup and maintenance. Dan Wright was instrumental in
getting a test of a wireless system at WOS. Results were promising but not
ready for prime time. There a lot of considerations including mass near the
course. If you build it they will not only come, they will hit it. GPS is
accurate to microseconds but only updates once per second. Using GPS to
synchronize oscillators is one plan under consideration. It's still many
thousands of dollars for each eye and much testing for dependably. There is a
lot of infrastructure behind a successful wireless network. 802.11x goes
about 300 ft we need to go 6000-8000 ft .
Gary W
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