[EMAIL PROTECTED] Wrote: 
> Altitude limiting device is a Z-log, I believe, and with that 500 ft is
> 500 ft. or whatever height  has been selected and your time starts when
> the motor is shut off by the device. You timer is still using a visual
> connection to start the stopwatch just as it is with winch launching and
> when you land is now up to you, as it always is.
> 
> Regards, Dave Corven.
> 
> 

Dave,

The Europeans are experimenting with an Altitude limiting format using
ZLOG and at least one other similar device where the CD opens a short
launch window and you are free to launch at any time.  There is a
countdown and at the end of the countdown, you either have to be at the
predetermined altitude and automatically shutdown by your altitude
limiter, or if you misjudge and launch too late you shut your motor down
as the CD sounds a signal ending the launch window (and presumably short
of the maximum allowable launch height).  Everybody's timing clock
starts on that signal.  Everybody is shooting for the same landing time.
Man-on-man at its best, I think.

Happy Landings,

Don


-- 
dharban
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