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GARMIN pitch servo problem.
- Thread starter dweyant
- Start date
The Garmin pitch servo install kit should come with a stop bracket that keeps the control arm from going over center. It screws into those holes on the metal face that surround the control arm. Look at page 16-7 of the latest G3X installation manual - https://static.garmin.com/pumac/190-01115-01_au.pdf.
HTH
Dave
HTH
Dave
Amadeus
Well Known Member
I have a couple extras if you decide to install.
Walt
Well Known Member
It should never hit the stop bracket, this is obviously an installation issue, check the plans.
rcarsey
Well Known Member
Something is wrong here.
Please check the lengths of: the servo's pushrod (6 7/16" center of eyelet to center of eyelet) and the flaperon pushrods (38.75").
And re-check the method/procedure you went through to drill the aileron torque tubes. (stick centered and locked with the long AN3 bolt 38iS/U-03 Step 7; both ailerons DOWN by 1/8" 38iS/U-05 Step 5) then drill torque tubes.
Did you mix up the aileron and elevator servo pushrods? Something was not done correctly.
Please check the lengths of: the servo's pushrod (6 7/16" center of eyelet to center of eyelet) and the flaperon pushrods (38.75").
And re-check the method/procedure you went through to drill the aileron torque tubes. (stick centered and locked with the long AN3 bolt 38iS/U-03 Step 7; both ailerons DOWN by 1/8" 38iS/U-05 Step 5) then drill torque tubes.
Did you mix up the aileron and elevator servo pushrods? Something was not done correctly.
Last edited:
Without wishing to be pedantic. You mention the 'Pitch Servo' but Im pretty sure the picture is the ' Roll' one, the Pitch servo is under the pilots seat.
Moving on:
Check the length of the two pushrods on both servos. These including the rod ends are fairly size critical.
Check you have them on the correct servo.
I'd disassemble the whole servo-pushrod- to flaperon/control column parts and start again.
To the best of my memory the KIA doesn't mention the Garmin Servo Stop Brackets nor does it show them on the drawings, I'm fairly certain that I left them off.
John.
Moving on:
Check the length of the two pushrods on both servos. These including the rod ends are fairly size critical.
Check you have them on the correct servo.
I'd disassemble the whole servo-pushrod- to flaperon/control column parts and start again.
To the best of my memory the KIA doesn't mention the Garmin Servo Stop Brackets nor does it show them on the drawings, I'm fairly certain that I left them off.
John.
Last edited:
I agree with everything John said.
This is an installation problem.
Adding the safety stop on the servo, would do nothing to solve it.
Use of the safety stop is never intended to be an actual control stop which it would be in this case. It is only a just in case item which on this installation, if adjusted properly, could never come in to play.
rcarsey
Well Known Member
You could be onto something here. During, after, and years after my build, I've found myself mixing up the two servos simply because they are not located where one would think they would be located (e.g. my RV6's pitch servo was.. in the tail). The two servo pushrods ARE different lengths.. though I'm unsure if the difference is enough to cause the problem in the photo.
