Micro Digital with 401 question

[Twister3D]

Hi just added a micro digital servo to my 401, I have had to lower my gain down to 18 to stop it wagging is that to low, should i use the delay pot to slow it down a bit and up the gain?????

Thanks
Twister

[Ade_Law]

what servo is this? how long is your servo horn?

Ade

[Twister3D]

Hi Ade
Its nothing special, Digital Super-Tec Titch 50, was hoping it would hold the tail better than standard servo on Twister, Not sure of arm length about 10-12mm to ball link. 18 gain does seem a bit low doesnt it?
Thanks

[Smoothound]

10-12mm on a small heli sounds a lot. I know the Trex has quite a short tail shaft but both mine are on about 5mm arm lengths with 401's and my gain is around 50-60% off the top of my head

[Ade_Law]

not familure with the supertec servo. i have had/seen great results with hitec HS56, ashtek 877 and 577.

Ade

[Twister3D]

Ok sorted wag now smooth with shorter arm, but one more thing, when turned to left the heading jumps back about 2 inches will not stay on heading when stick released at what can be causing this ?

[Ade_Law]

if you flick the gyro into normal mode does it hover without trim in no wind?

if you have to hold a lot of stick to keep the tail straight in normal mode its worth having a play with the length of the tail pushrod to try to mechanically trim the drift out.

Ade