I was interested in the 3600 ft gain on the winch launch flown by Elke
in the Ka8 so I analyzed the igc file.

As it turns out there was a 13 kt headwind during the launch. (This can
be determined by the circling done after the launch). The maximum angle
of climb was never over 40 deg (relative to the air) and his airspeed
was mostly in the high 40 knots but never getting to 50 knots.

The effective horizontal distance of launch through the air was about
7500 feet (taking the headwind into account) so, in still air, you would
have to have a verrrrrry long rope and runway. The length over the
ground was 4500 feet.

By the way I used 3D-Tracer and a spreadsheet to do the analysis. If
anyone wants any of the graphs for that launch, let me know.

Larry Bogan

3D-Tracer -- www.stransim.com

Bill Daniels wrote:
OK, the new record is 2 minute launch to 1100 meters (3609 feet) AGL with an
average ROC of 17.8 knots. No wind to speak of. It sounds like pilot Elke
Daniel was flying a K8. The starting rope length was 2000 meters (6562
feet). They used a new Egger winch.

As soon as Aero-Club Landau gets some wind down the runway, I bet we hear of
1500 meter launches. I really wish I had a video of this.

Bill Daniels

"Henning K. Nielsen" wrote in message
k...

If you are interested there is an igc-file from one of those high launches
available at http://www.aec-landau.de/ (click Projekte - Höhenrekord mit
PE-Seil ).