First of all, if the glider is being pulled level, the winch doesn't see the weight, only the drag. The drag is tiny compared to the winch's pull capability, so it will be spinning at nearly its zero-load speed.
I think a typical Ford LS 6V has Kv=350 rpm/Volt, so at 12 Volts it will be spinning at rpm = 350*12 = 4200 rpm = 70 rps With a 3" diameter drum, the line speed will be 3" * pi * 70 rps = 660 in/s = 55 ft/s = 37.5 mph Seems about right. In any case, you can check it by timing how long it takes the winch to pull the chute some measured distance. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
