New 200 With A Tail Problem..Help!

[ferretface]

Hi All and Happy 4th,

I just got my 200 together last night and took it to the garage this morning for a test hop. I got it light 2 or 3 times on the first battery and everything was OK, just needed a little yaw trim. Second battery I got it light and it goes into a fast piro..really fast piro. Try it in rate mode, same thing. Take off the mains and spool it up, at a certain speed in starts kicking the tail almost exactly 45 degrees at a time, a little higher rpm goes into a fast piro. My question, can this be noise due to wire routing (things are kinda jammed in there) or maybe vibration into the gyro? Any suggestion would be greatly appreciated!
DX6i, 6100, 3 X S60, G110, DPS75 on the tail. I just wanna fly this little guy!

Paul

[CHOPPYPILOT]

Have you checked the gyro is working in the correct direction?

[stoatnchips]

Ferret, check that the tail rotor is spinning the correct direction... up into the downwash or Anticlockwosie when view with the tail fin behind the tail blades!! The other thing to check is Gyro reversing set correct. The most common reason for fast uncontrolled Piros is a reversal somewhere in the tail.

Stoat

[Splix]

You're gyro direction is reversed. There should be a dip switch or something on you're gyro to change the direction of it.
...also, you cant trim it light on the skids in the garage. You're out of trim due to ground effect. Its always going to shoot left on the garage floor before its in the air. You need to trim it in a hover. If you're unable to hover and trim at the same time, then light on the skids in grass would be better. Anything is better than a hard smooth surface to trim on.

[ferretface]

Boy, thanks for the fast replies!
Gyro direction and tail blades are fine. Like I mentioned I actually got it into a low hover and yawed it back and forth a couple times the first two flights. I'm spinning it up on the dinning room table with the main blades off and tail linkage off and at a certain RPM the tail servo drives to a limit, same direction every time. Reduce the RPM and it goes back to center. Gotta be vibration or noise right? Can I bypass the Gyro and go straight into the rx rudder chanel?

Thanks,
Paul

[Splix]

Boy, thanks for the fast replies!
Gyro direction and tail blades are fine. Like I mentioned I actually got it into a low hover and yawed it back and forth a couple times the first two flights. I'm spinning it up on the dinning room table with the main blades off and tail linkage off and at a certain RPM the tail servo drives to a limit, same direction every time. Reduce the RPM and it goes back to center. Gotta be vibration or noise right? Can I bypass the Gyro and go straight into the rx rudder chanel?

Thanks,
Paul

ummm....hah, ya you can bypass the gyro and old skool it. What chan. would you plug you're gyro into then?
Vibration wouldnt make you piro, just jitter the tail a little back and forth. Noise...all of my wires are wrapped completely around my gyro and I'm not worried, acts fine.
Be careful not to overspin you're motor with the mains off.

[CHOPPYPILOT]

It might be a faulty gyro or servo, Have you another gyro or servo you could try? I Have heard of a similar problem on a blade 400 where the servo was at fault, when spooling up it would go hard over one way.

[Jetleaf]

Where do you have the gyro mounted? And how? Pics of the setup would help

[ferretface]

Hi Guys,

Thanks for all the help. Turned out to be the tail servo. As I was bench testing it twitched a few more times and died completely. I put on a DS75 I had and I'm back up and "skimming" :). The garage is just too small for a first attempt at a real hover so I'm off to the park in the A.M. Thanks again! This was my first build and without the pictures and posts here in the forum I'd still be scratching my head.

Paul