Guess what gyro issues

[jamiesawyer28041978]

Evening guys ive been enjoying my trex 450 recently but the tail seems to be letting it down lots . I have this as the servo http://www.realraptors.co.uk/shop/in...oducts_id=2349
And this as the gyro http://www.fast-lad.co.uk/store/kn92...550-p-376.html its allmost like it needs revo mixing . Heading hold NOT . Pi,,ing me of a bit .If I go hover to full power it kicks 90 deg every time and wont even try to hold . In rate it hovers fine and the mechanical set up is fine .Its a fast ff 7 2.4ghz radio.

All help realy appretiated

[Andy from Sandy]

If the tail kicks to the right then that is the torque reaction against the motor. I don't know either of the products but the usual suspect is not enough gain. Try increasing the heading hold gain on the gyro

Althought the spec looks reasonable for the servo if it is slow I will assume you will get the same effect. Similarly if the gyro doesn't have a high frame rate to get the information quickly to the servo you may get the same results.

My experience is with a GY401 and 9254 on a 50 or 9650 on the t-rex 450. It is very predictable. You get the tail kick to start and by increasing the gain a little at a time the kick stops.