testing a gyro??
 

Arright so i'm getting past the frustrated stage now[:@], i think i'm mainly having gyro problems... I bought it from a freind that aparently had a bad crash with his heli it was on and he didn't feel like putting it back together. The gyro has no marks, scratches or anything on it so i'm assuming its good. I've been flying it sense christmas fine. (other than the twitching the gyro's servo) I just went to fly it and when throtteling up the tail wagged very violently back and forth and no adjustments I made fixed it. Does anyone know of a way to test the G500t gyro? I'm planning on getting a dx7 (thanks to another post) but until then..anything I can do?

RE: testing a gyro??
 

Are you saying that when the heli, engine off, is sitting still on the ground, that the rudder servo is twitching (not just buzzing a bit)? If so, that is a don't fly condition and the most likely culprit, in my experience, is the servo. A servo swap is the easiest test of this and then once the twitch is resolved flight test very cautiously and low until you're confident the gyro also operates properly. Otherwise, if you don't want to flight test the gyro, your option is to send the gyro in to have it checked out.

RE: testing a gyro??
 

I had a bad gyro once, simple telebee like gyro that caused the symptoms you described but mine was pirouetting like crazy upon throttle up.

One way to test on the ground is to power everything on, put the throttle hold on and grab the tail gear in your hand and push the tail away from you ... the gyro should tell the tail to compensate and push the tail slider in the opposite direction (towards you) as if to turn the nose of the heli right. That's one easy way to see if the gyro is operating correctly.

Tail wag can be overcome by decreasing gain on the gyro channel, usually done on the gain channel on your TX or on the gyro itself if you do not have that option.

RE: testing a gyro??
 

Try putting HEADING Hold on instead ...

RE: testing a gyro??
 

tippy ... I suggested THROTTLE hold for safety!

The gyro may or may not have a "heading hold" option button on it, but that should be obvious.

RE: testing a gyro??
 

I agree with that assessment, swapping servos on the tail should be the first thing to try. Then remove the gyro from the line, plug in the servo directly in the receiver, and also swap the tail servo lead with another servo lead on the receiver. Just don't forget to tie down the bird when troubleshooting snags like that.

RE: testing a gyro??
 

Sorry ... I presumed that the motor would be disconnected from the ESC while doing electronic
component testing (the preferred safety measure).
This is what caused me to think throttle hold was a typo.

Although using Throttle Hold is a safety measure above nothing ... you are still vunerable to spurious RF
noise causing the RX to send a throttle command to the ESC which could still spin up your motor ... even in Throttle Hold.

Using throttle hold is a measure of safety but disconnecting the motor from the ESC is best ... negating the need to be in Throttle Hold.

Sorry for the confusion.

RE: testing a gyro??
 

Thanks tippy, I too apologize for confusion.

RE: testing a gyro??
 

Awsome! thanks guys, i figured out my gyro problem...(well the guys at my lhs did) but even with the gyro holding great, when i'm in fff I lose power for a breif second. I've read on a couple other articles that other guys are having trouble with this as well. I changed my settings on my esc to " brake disabled, high timing, middle cutoff voltage, heli 2 mode, and quick speed" Is this what everyone else has their esc's set to??