Model Forum / Radio Controlled / Helicopters / October 2003

Set the rudder on your Tx to 50% and try again.
Succes,
Chris

Ok, follow this:---

With the Tx and Rx turned on, the tail rotor servo should position the tail
rotor pitch slider roughly halfway along the tail rotor output shaft, with
the servo arm itself "central". Check that first.

Now check that there's some pitch already on the blades when the Tx stick
(and trim) is in the centre. Look for around 8 degrees or better (it's and
electric heli remember)

Now move the tail rotor control stick to the RIGHT and watch the tail
blades. This action SHOULD add pitch and NOT take pitch off. If it adds
pitch, go to answer  3:-), if it takes pitch OFF, reverse the servo action
in the Tx.

(3:-)) If it added pitch like it should, check which way the servo ARM
moved, coz that's what you're going to be looking at next.

Now.. take hold of the complete heli (by it's head) and lift it off the
bench with one hand hand and move the boom, turning the heli to IT'S left.
(That's anti-clockwise for those who never got their own heads arounf "left"
and "right":-)

Watch the tail rotor servo when you do this, because you need to see that
when YOU move the heli's nose left, the gyro tries to move it back again,
and in order to do this, it has to add RIGHT tail rotor while the heli is
moving. If you're looking at the servo arm and it moves the same way id did
when YOU put in a right tail rotor command, then the gyro is sensing and
correcting properly.

If the servo DOESN'T move the correct way, the GYRO needs reversing and this
is done AT THE GYRO and NOT at the transmitter. Either mount the gyro upside
doqn, or find the reversing switch and flip it.

That's sorted through the tail, so now if the heli still tries to rotate on
take off AND it's actually got to the point where it IS taking off, then
your main rotor pitch is a f.cking mile out. Too much main rotor pitch and
the heli will rotate to it's letft (anti-clock) and too little main rotor
pitch will see the heli wanting to rotate to it's right (clock-wise).

Adjust to suit.

Fly

Crash.

Repair.

Sell on eBay:-)