csm gyro

[martnslater]

hi all again,
just fitted the csm 310 gyro to my trex , but when i spool up it holds steady untill i put some throttle on then it spins to the right all the time even when i try and put opposite rudder stick not sure of how it should react when i move the helli slow as it says in the book everything seems ok i have a jr x3810 radio and i think i have got some settings wrong any help here would be greatly apprieciated. thanks martyn .
ps i have not got the main rotors fitted would that be any problem.

[Made2Fade]

No blades fitted? Yeh i think it might be a little bit of the problem mate.

[martnslater]

is it a big prob?
the reason i have not fitted the rotors is i am messing in my smallis kithchen,
the wife would kill me if i smash it into 1 of her cupbards lol .
thanks again martyn.

[Biggles]

I feel an explosion coming on here...

Imagine jacking your car up and flooring it through the gears. Then just keep the throttle wide open....no loading.

Do you see where I am going with this!!!!

[moyesboy]

running the trex without the main blades won't harm the motor but best not to run it too fast. yuo shpuld not run the motor disengaged from the main gear except for a brief kick to check which way it goes.
Its a bad idea to run with no main blades with a nitro heli.
I assume you have a HH gyro and it is in HH mode?
This first likely thing is that the gyro might need reversing.
Are you sure than when you turn the heli the tail blades pitch changes in a way that would try to correct the turn?
The second thing is perhaps the rudder channel on the tx needs reversing. check that out for which way it moves the tail pitch.
Its also possible to cross the belt so the tail is rotating the wrong way.

If the gyro is working in the wrong sense, and the stick in the right sense,and you are in HH then the gyro will beat the tx stick and you wont stop it turning.
Its likely thatit is the gyro reversed, because the normally the torque reaction would make the heli turn left. There is a switch on the gyro somewhere to reverse it, try that.
I assume by "spin right" you mean the nose turns right (the heli turns right).

[3dbasher]

motor and esc ok mechanics may explode
oh the beer

[Smoothound]

motor and esc ok mechanics may explode
oh the beer

Why?

It's not going to over speed unless he has his gearing wildly out. It can only spin as fast as it could with the main blades on.

On a nitro this would be different.

[marktigere1]

Does sound like the gyro is working in the wrong direction.

Also, if the Heli is on the floor then there will be a certain amount of friction holding the Heli staright. If it turns due to the torque of the paddles and flybar (I think you said you had no main blades fitted) then the tail rotors may not be able to overcome the friction of the floor and the torque to bring the tail back in line. This happens to me when spooling up on concrete. Dose not happen on grass.

Are the blades of the tail moving but the tail not? (I think I have phrased that right)

Cheers

Mark

PS. Might be worth getting the main blades on and letting someone have a test fly of it?

[Made2Fade]

Only proper way to do it is whack the blades on, get someone to test fly it if ya aint confident. Id say it could be the gyro is reversed but without a load on the blades you cant tell. I agree with Mark the tail rotor wont be able to overcome the torque. If you hold the heli and spin the nose to the right then the tail servo should move anti clockwise and vise versa. If it does that then its moving in the right direction. Then again that depends which way you have mounted your tail servo. Make sure its not in smart lock mode when you do it though.
Lee