rcpilot_971

My Feedback: (50)

I have two Hitec 5645s that im getting 1/8in of play in them Im using a SWB 1-3/4 is this normal theres not as much play with the smaller arms as there is with the bigger arms the arms are new and fit tight The servos are new first time I used them


Thanks Tim

A.T.

As answered another forum, for benefit of other readers here:
A very long single arm, the longer the servo arm, the more the natural play in a gear train is accentuated and the torque is reduced accordingly. Servo torque (How is it measured)
Always use the shortest horn and use the closest hole to the output shaft as possible.
Whilst appearing "tight" is the spline count correct? This as Futaba horns may appear to fit but do slip under load. Servo - Horn arm Spline Count and Inter Brand Compatibility

Regards
Alan T.
Alan's Hobby, Model & RC FAQ Web Links

BarracudaHockey

My Feedback: (11)

They can get sloppy with vibration, and as AT says, that gets amplified with a longer arm.

You can replace the gear sets for about 15 dollars I think

jaka

Hi!
Metal geared servos have always more play compared to nylon gear servos.
But as long as you follow the simple rule that says: Always use the shortest possible servo arm as possible and the longest rudder/aileron/elevator arm as possible...everything will be fine.

Beware that Hitec, Futaba and JR have different numbers of splines in the servo arms.JR has 23, Futaba 25 and Hitec 24.

rcpilot_971

My Feedback: (50)

So will it be ok to Fly with 1/8im of play in the elvator the plane is a great planes Yak 160 with a DLE 55 on it


Thanks Tim

rcairflr

My Feedback: (44)

All metal gear servos will have some play. If you don't want any play get titanium geared servos by Hitec.
1/8 play in the elevator is no problem. Go fly