Gary Boggs uses a payout winch system http://www.nwskysports.com/


wrote in message
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It seems that a payout winch similar to those used for hang gliders
might be useful as a more efficient alternative to auto tows. You can
make better use of the runway length and have perhaps a safer launch
with proper calibration. Is anyone using such systems? Are they
practical? Are they in fact better than a straight auto tow?