Hi Oliver,

I was reading your thread on this nifty software you've created. Wondering how I go about getting one to help me with my flight control settings?

Couple weeks ago I burnt out two brand new 8611 servos for my flap system. Setting up for landing I reduced airspeed and drop first notch of flaps. Everything fine! Just before turning base leg from downwind I dropped the rest (about 85 degrees). I noted that the airplane abruptly started to turn to the left. I compensated with an automatic trim correction to maintain straight and forward flight. So I increased turbine thrust and decided to do a go around as the sudden banking caught me by surprise. Flipping the flap switch back to first notch I noted there was no response. So the jet goes by me and as we looked it was verified that one flap was lower than the other. Managed to get the airplane back down and upon inspecting the problem both servos where locked. When I turned off the transmitter tried to move the servo arms and still locked. I suspected that the servo motors just burnt up.

I am clueless as to why this occurred. I have put on 5 flight already on this Dragon and never was there a sign of any problems. Every time before every flight I do a thorough inspection of flight controls, batteries, landing gear, turbine, hardware, and so on. I've usually seen these problems before they occur.
I've gone ahead and concluded that maybe my geometry set up was incorrect.
It’s a typical install for flap system.

A little information on the jet that maybe of help:

Xtreme Jets Dragon
Total weight: Have not weighed it but guessing about 35 lbs wet
Servos: JR 8611's all around (Brand new)
Turbine: JetCat P160SX
Flap settings: First notch (takeoff) about 15 to 20 degrees, Second setting (landing) 85 degrees
Number of flights: 5

Can you give me some of your expert advice on this issue? After that flight losing flaps and not symmetrical it shook me up pretty bad. I've never had such an incident like this before with a model jet. Had one while piloting a full scale aircraft and it was not nearly as tough to fly as a model jet is, Guess I’m even now, LOL!

Hopefully this device you've created could be useful.

Thank you for your time and looking forward to doing some flying with you next time you visit Houston Texas.

Regards,

Orlando