Thank you very much for all the input, it has really helped clear a lot of things up and showed me some new testing strategiesbjt4888 wrote:someusername,
Sorry, I was typing too fast earlier today. Backoff winds when 1/2 motor testing should be approximately halved just like maximum turns are halved. I made a mistake in the post above indicating backoff turns for a full wind. For a first 1/2 motor test flight wound to 750 - 780 turns, a backoff of about 45 turns should give you a launch torque of .5 in oz. If this flight is safe, then you could increment torque up by backing off less on the 2nd and subsequent flights (ex. same max turns and backoff 30 and, if still safe flying character and under 28 ft. total altitude, try backoff of 15 or 20). I addition to determining the torque and winding strategy that will carry you to 1/2 the height of the 65 ft. Nationals site (probably want to shoot for 50 or 55 ft to be safe), 1/2 motor testing will demonstrate if your airframe can handle high torque. As torque is increased, your airplane will probably bank a fair amount in the first circle or two. This is ok as long as the bank doesn't cause the airplane to roll to the floor. It's not even a problem if the airplane descends in the first 1/2 circle or so and then starts climbing, although this is not ideal for a 65 ft site for this type of airplane.
Another article you could read about partial motor testing is in Indoor News & Views issue #120 (F1L Issue). It's easy to find on the web.
Good luck,
Brian T.
Regarding the previous post, I am aware I have incidence angles (sorry if I worded that badly), but I have no good way of measuring them.
Also, how do you get so many winds on those motors? I have wound up 0.094 motors to the breaking point before (never tested before) and they all broke at about 1500-1700 (they were all at 2.0g) and the last time I tried to get a 0.081 over 2000 it snapped at 2100, just before I started to backoff. Any thoughts on this? Am I winding them wrong?
But I will definitely try out the half motor testing, that should help out a fair amount I hope, or at the very least help me understand the event more. I have not had an issue with the rolling much this year, partly because I launch the plane with a slight bank to the right, which almost always cancels out the roll or gives the plane enough time to recover from a bad one.