Hey Guys,


Alright--- I have a cobri gear box --5.0:1 ratio. I have it installed on myeflite mini edge.

First flight with this gear box was incredibly smooth running a 12X6 SF prop and a tru turn E spinner.

Unfortunately the first landing was a little rough, end result dropping the plane on its nose from about 4 feet.

Upon visual examination everything looked ok until i started to notice a small wobble in the the nose cone. My first thought was well the cobri gearbox shaft in suppossedly un bendable so that cant be it. So i thought it was the tru turn collet. The other thing I noticed is that upon putting full throttle on my Park 400 motor it would start out good and then at full throttle there would be a high pitch whine from the motor and rpm would drop on the prop.

My next though was damn it the motor failed, so I ordered up a brand new himax and installed it tonight. using a new e-collet that high pitch whine is back with my new himax motor. I next thought maybe an esc--tried both motors with 2 different esc's the same whine and loss of rpm/thrust, as if slipping. SO my question is --Have i bent the unbendable shaft?? Is this what is causing the high pitch whine, where at such a high rpm the shaft being bent causes the tooth contact to slip?

What say you guys, right now I'm totally lost.

---Mike