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  #1  
Old 09-26-2018, 06:57 AM
mark960 mark960 is offline
 
Join Date: Mar 2010
Location: Long Island NY / Ft Myers FL
Posts: 40
Default Electric Elevator Trim Installation

Hi,

I am considering adding electric elevator trim to my RV9A. I currently have manual trim but would like electric so that the autopilot can automaticlly make trim adjustments. From what I'm gathering on the Van's website, you either have manual or electric, Not both.

Is there any way to add the electic trim without removing the manual?

How difficult is it to add the electric trim to a completed aircraft?


Thanks,
Mark Klepper
N1075 RV-9A
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Mark Klepper
N1075 FA81 - Ft Myers, Buckingham Field
Van's RV9A Slider
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  #2  
Old 09-26-2018, 09:44 AM
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Fearless Fearless is offline
 
Join Date: Aug 2006
Location: Crestwood, KY
Posts: 835
Default Am I misunderstanding?

Mark,

The autopilot servo would connect to the elevator push tube. I have the electric elevator trim on my plane. You would have to remove the cable from the trim in order to install the trim servo in its place. Then you would need to run the five wires from the trim servo to the front of the plane to your switch, power and ground. The trim servo is the one Ray Allen sells.
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RV-9A Based K6I2
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Building RV-12 with brother
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  #3  
Old 09-29-2018, 11:16 AM
mark960 mark960 is offline
 
Join Date: Mar 2010
Location: Long Island NY / Ft Myers FL
Posts: 40
Default

I already have a Pitch Servo in the tail for a Trio AutoPilot. The pitch servo has an output that will directly control an electric trim.

Just hoping I could leave the manual trim in place. (And working) It looks like you have to choose either Fully manual trim, OR electric trim only. Is that correct???
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Mark Klepper
N1075 FA81 - Ft Myers, Buckingham Field
Van's RV9A Slider

Last edited by mark960 : 09-29-2018 at 11:19 AM.
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  #4  
Old 09-29-2018, 11:48 AM
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az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 9,617
Smile

One option, used by some early -6 builders, is to buy a shorter push-pull cable and mount the Ray Allen trim servo on the flat deck under the fiberglass tail fairing.

This way there is no modification to the metal work of the horizontal tail.
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EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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