<<In a message dated 10/20/2004 11:36:07 PM Central Daylight Time, [EMAIL PROTECTED] writes: Hey guys, you have provided a great deal of learned opinions about launch and zoom technique, how to determine altitude, etc., but no one answered the simple question:
"How many seconds from release to leveling out?">> Originally posted to RCSE on 10/17/04. >From Flight Data Recorder: says it was about 4.5 sec (+/- 0.5 sec depending on the wind, launch quality, etc.). It's about 1/3 of the total launch time. This was not a full-size winch but the 1/3 factor is probably reasonably scalable. Time was measured from the max velocity at the 'dip' to max altitude/typical cruising speed. I timed a number of 3M ship, full bore launches at TNT (including a few Icons). Total launch time is about the same probably due to faster tow speed with more powerful winch system. Average of 9 launches. Time on tow: 8.4 sec Height on tow: 280 ft Speed at release: 107 fps Time in zoom: 4.4 sec Height (zoom only): 107 ft Final speed: 31.5 fps Final height: 385 ft Total launch + zoom time ~ 12.8 sec - Dave R 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.
