On Sun, 02 April 2000, "Dan deVries" wrote: > Subject: [RCSE] Winch Launching techniques > 2. "Full Pedal" launches, even with the much higher wing loading they > create, should still be flown at the sailplanes max L/D. I disagree here Dan. On tow the best climb is given by MAX Cl of the sailplane. On tow there is drag of the line and gravity working in addition to the sailplane drag. Increasing Cl increases the sailplane drag some but has very little effect on line drag and gravity so the result is more height per ft of line takeup. Maybe that is what you meant? > That speed is > significantly higher at high line tensions/wing loadings. The result is > less time for line to be "reeled in" so shortening of the line is not much > of an issue considering the altitude gain; Actually this issue changes with wind speed. With no wind the best climb-per-ft-of-line is at high tension. When the wind picks up things can change. The extreem case is when the wind is blowing fasy enough to allow you to just put your foot on the winch drum and kite up or even pay out some line. You just have to know what wind speed will give the best launch at less than max pedal. This is complicated by the zoom also. Liftroll is at: http://homepage.av.com/johnhazel/downloads.html ____________________________________________________________________ For the largest MP3 index on the Web, go to http://mp3.altavista.com ____________________________________________________________________ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
