Originally Posted by
F4dar
Guys, I just started flying 3D with Diablo, had other 3d EDFs before, and had a couple of sudden pitch up on take off.
....
Nonetheless I need to fix the fuse and will go back to regular tank and will reduce the elevator to 20mm. Is it possible that my TV is not trimmed (to the thrust line of tube, how best to line up the TV to tube?
Haven't flown mine so much yet, but never noticed any pitch up after take off. But didn't try to rotate too early and TV is is OFF in T/O and landing mode (but TV gyro stays ON to dampen any unwanted pitching).
About trimming and centering the TV, i didn't find it easy as its tapered and the back end is not cut accurate enough to use a angle meter.
But, here is how i done it on other planes after eye balling the line up first.
Fly straight and level and trim the plane at a high cruise speed. Then chop the throttle to idle. If the plane starts to climb the TV is too much down. If it starts to dive, its too high.
To center left or right, fly past yourself in low pass, a couple of hundred meters after passing yourself pull into vertical and release the sticks. You will see if it plane wants to go left or right.
My TV elevator axis was good, but it pulled a bit left in verticals so have adjusted that before next flight.