I have a couple of them including the one with the Libelle mods.
Nice wing root fairings on the flaps which move with the flap.
The cockpit vent inlet/exit has been superseded
and the wing leading edge mod is only relevant to
the Hutter section used on the 301.
He does say the main gain was putting a 100
pounds of water in it. I suspect more water is a
major part of any glider performance gains in the last nearly 40 years.
Mike
At 06:52 PM 8/27/2017, you wrote:
Any body got any idea where is can get any of
these publications from  the seventies??
Wil Schumann did a clean up of a libelle that i
would like to read about again.
Ron
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