Tail turns while in flight

[briancleator]

Hello again people with the knowledge, yet another question for you all. By now you should be sick of these.

My raptor 30 has been flying great except the odd glitch but this one has me puzzled.
When i take off, the heli starts to pirouette not fast just slow. now i have adjusted the rudder trim to compensate it but when i look at the tail blades they are more angeled than they used to be, should i turn the gain up on the gyro or there is a little switch next to that which just says neutral ????
And when the heli is flying when i power up more it powers the tail up and it starts to pirouette the other way.

[briancleator]

The gyro is, gws piezo 01 np
The servo is, sanwa srm 102

[Daz(DJLFlapper)]

Hi,

this is a late answer I know I have been away for sometime and have been unable to visit the site. But I am back now and ready to help all that I can.

Now to answer this question.

A Gyro is only as good as the person setting it up. this done both machanicaly and through the radio/electrics.

Firstly the gyro mentioned in this question is a normal rate gyro and it is a reasonably good one so if your heli is drifting around slowly then it is probably because the heli is not machanicaly set up on the tail.

the gyro will never hold the tail in one position unless your indoors and out of any breeze. however you sound like your pretty close to having it right. what you need to do now is, When your hovering your heli, use your rudder trim to stop the drift that you say you have. When your tail has stopped going round then your ready to land.
At this point your must take your servo horn off the servo BUT DONT MOVE IT OUT OF POSSITION.
Now take your trim to center on your radio. Then replace your horn in the same place you took it off.

You should now find that when you hover again the drift is gone. if it is there still then again use your trim to dial it out. It should definatly take less this time. If you find that your horn only needs to move a little bit then it may be worth you takeing it out or in 1 trun on the ball linkage or more till it takes out the drift.

so ok now you got the drift taken out, you meantion that when you give power the tail turns. this is what the revo mix is for on your radio.
for example
If I was at hover and I give more throttle lets say the tail drifts to the right the nose goes left. this is normal and it is happening because the engine power has increased without the tail pitch compensating. we use revo mix to do just this job.
I would then bring in about 15% of mix and see if this helps or makes the problem worse. going to hover and then climbing each time to see what happens. If it got worse then I would take the revo adjustment the other way and try again. when it started to have a reducing affect I would Keep adding/reducing till the tail held as the heli climbed.

you can allso do this for the decent. in a rappid decent the tail may want to go left and the nose right. I would then put in -/+15% to see if this helped stop it. I would adjust either way until it does.

now you got the heli mechanicaly set at hover and the revo mixs set so you can climb and descend with the nose makeing it easy for you the Pilot.
So go and have lots of fun flying now your heli is nice and stable.