Don,
For a model flying on half winds that one looks to be producing about the expected performance. As others have said, definitely use a torque meter to get things dialed in good and close. If you don't take one, it doesn't take long to build one...maybe an hour. In one flying session you can get the information you need for basic contest flights.
Now on to the more important bit: your student's model is flying well, looks to have adequate stability, and is trimmed out to a safe pattern. That said, the stab is tilted far too much, especially at launch. Check to make sure it isn't warped (probably washin on the left side) in a way that's causing the tilt to increase at high speeds. I would recommend reducing the stab tilt to 1/3 of what it currently is, as that's really eating into the efficiency of your tail surfaces. That amount of tilt would take 1/3 of the performance off of an F1D. It's that big of a deal. And you really don't need that tight of a turn. The model could circle much wider and still be safe, so once you fix that you should be in good shape.
The conditions in your video were pretty rough. That's a lot of turbulence, and it shortens the model's flight time and reduces its climb performance for a given torque value. If the air is smooth at the contest, your student will need to reduce torque slightly to stay out of the rafters in comparison to the safe torque under the conditions in which you were practicing. Obviously you were going nowhere near the ceiling, so you don't know any of those torque numbers yet.
Keep up the good work; your student should be a good competitive threat at the local contest.
-jf
Received on Mon Jan 23 2017 - 05:36:55 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET