I dont understand

[flip4444]

Hi all. got this problem with my trex 450. Just as it seem I am about to lift off. A strange wirring sound occurs and I lose power. Posted a vid on Utube to show the problem. Anyone with ideas on what this problem is, please share them with me as I am a total noob and need all the help I can get. Cheers. Here is the link [ame=http://www.youtube.com/watch?v=7LXNoTHMXYU]YouTube - 03092010010.mp4[/ame]

[Mart61]

The tail kicking looks like the ESC protection cutting in. To prevent (or warn of) an impending serious loss of power dues to a drained or otherwise defective battery, the ESC causes the power to the motor to "pulse", thus causing the tail to kick.

It's a "better land it now" signal really.

Two possible causes:

- A defective ESC or more likely,
- A drained or defective battery

EDIT: one other thought just occurred to me. Check the tail drive belt tension. A loose and slipping belt would cause the tail to kick but would not account for the loss of power.

[millerman]

esc problem or radio problems i would say

[flip4444]

Thanks Martin. I am at a total standstill. Does it with both batteries I have for it. Brand new ESC. Could it be an error in setting up the ESC do you think? Regards Phil.

[themagician]

trex 450

just had exact same problem it burnt out the esc.
changed it for a new one within mins same prob.
diagnose! faulty batt!
fitted new esc now with new batt ok!.

[Mart61]

Thanks Martin. I am at a total standstill. Does it with both batteries I have for it. Brand new ESC. Could it be an error in setting up the ESC do you think? Regards Phil.

What ESC are you using? If it's this one, take a peek at the settings contained in the manual and set the ESC up appropriately.

Are the batteries new too?

[flip4444]

It was my programming of ESC. Just followed Finless's guide vid on programming Align ESC and all is good now. Thanks for the tip on it being an ESC problem guys. Cant wait to fly her now. Once again thanks.

[Mart61]

Nice one! Glad it was a simple (and cheap) fix!

[Mslater]

Love the test area - keep safe

[Spanner]

Took me a while to work out where you were flying her!! Boing!