On Mar 26, 11:30*am, JS wrote:
Believe you can also use FLARM and a PDA (etc) to automatically log the release from tow (when the distance between towplane and glider starts to change). Devices can upload the information to the office computer when the towplane is in WiFi range.
Contact Mark Fisher at Swift Avionics.
Jim
swiftavionics DOT com DOT au

Doesn't meet the need of what you're looking for, but I have to give
credit them for being original and I certainly can't speak for how
well it worked.
A few years ago I saw a rental Blanik with a Hobbs meter installed.
It was powered by a solar panel and connected to a switch, I believe a
repurposed stall warning switch mounted on the exterior of the
fuselage. When the glider was flying, the the circut was closed and
the meter logged time.
Don't know if this actually worked as designed, but found it amusing.