On Monday, October 22, 2012 11:16:55 PM UTC-4, Sean F (F2) wrote:
https://vimeo.com/51897500

We're using 3,100' of rope now (4,100" potential), which yields 1,300' no wind and 1,500' with some wind. This is more than enough for pilot/driver training. If the pilot spoilers down immediately after release and lands "backwards" we can get six minute turnarounds.

Interestly enough (to me) is that the heavier Duo ends up with more altitude than the single seaters. Not sure of the physics on this.

The 20 second vario averager reads about 25 knots on the climb.

We're calling off airspeeds as we gain more proficiency, as there is a lot of "Kentucky windage" in how much throttle to use. Veteran drivers have a better sense for this as they combine engine noise, rpm, line sag, angle up, etc. We're not there yet and hope to have a line tension transmitter based on model R/C telemetry operational this winter. ( A John Good project.)