I had a big dissapointment with my park zone typhoon today... I took a cue from this forum, and replaced the stock servos with the Hitec HS-81's before I even flew the plane. The transplant went well, and though my servos still "chatter" a bit, everything seems fine. I was getting carried away with snap rolls and inverted flight the other day, and I crashed it, snapping the fuselage. No problem, I thought, and just stripped it down and threw the whole thing into another fuselage. I spent a good afternoon checking it all out, and it seemed flightworthy by the end of the day. I'm still using stock NiMH's with the plane, and today, the first flight with one went fine, though I did notice that when I applied a bit of rudder, I would lose throttle occasionally for a split second. I made a mental note to check that out, and loaded up for flight #2.

Then, disaster. Well, a mild one. In mid-air (with spectators at my field, of course, janitors at the local high school) my engine seized and I was suddenly flying a brick. I heard that typhoons crash and burn without power, but I actually made a nice smooth landing with only servo control, no engine. Taking it apart at home, there's nothing obstructing the rotation of my prop, but when I apply throttle, the engine just chatters, moving clockwise, counterclockwise, and continuing to oscillate at about 3-5 beats a second. Also, when I attach my battery pack now, I don't get the beeping hello noise. My servos all still work great though.

Is my ESC bad? My receiver? My motor? This is only my fourth flight with the damn thing, and problem-laden or not, I'd still like to know what's up to prevent it from happening again. BTW, it was cold at my field today, about 29 degrees fahrenheit. Is this a factor?

Thanks for helping a noob out...

You don't mention what type of motor you are using. If it's a brushless, it could be that a magnet was knocked loose during your crash. Or a wire in the motor may have been broken.

Incidentally, it is the motor that actually makes the beeping noises. The ESC uses the motor as a "speaker" of sorts to generate its sounds.

- Jeff

The Typhoon comes stock with a BL. I bet that that's your problem. Drop an e-mail to Horizon, and more than likely, you'll have a new motor by next weekend. THey've got GREAT customer service.

Check the wire connectors to the motor. Sounds like one of them is not making a good connection.

I had the same thing happen when I had snow melt inside my motor. Once it evaporated away though it was fine. Probably got a short in your motor.