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  #1  
Old 08-31-2015, 09:11 AM
Gizmos Gizmos is offline
 
Join Date: Apr 2015
Location: Burbank
Posts: 96
Default Ray Allen trim with auto pilot RV-9A

I have the garmin install manual 700+ pages. I still have a question on ray Allen elevator/ wing balance servo installation. Is the ra servos hooked up to the garmin gmc 305? Or is the ra servos just used to trim the plane when you are not using auto pilot( gsa28)? Can you use the ray Allen servo for yaw? If not, where do you in stall the yaw servo? I am using two g3x, gud 73,gmu22, and gmu22.
Also I am thinking about AOA , can I use a gsu25 as backup and for the AOA? I will need to purchase this unit. What do you think about using AOA ?

Last edited by Gizmos : 08-31-2015 at 09:42 AM.
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  #2  
Old 08-31-2015, 09:20 AM
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sbalmos sbalmos is offline
 
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Location: Liberty Twp, OH
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I forget the section in the manual, but you wire the trim motors *through* the GSA 28 servos. This allows the G3X system to auto-trim when the A/P is engaged. When the A/P is not engaged, trim control signals are passed straight through the servos.

The yaw damper, I think, is really only used for the RV-10, being a bigger plane. I haven't heard of / seen any other RV using the yaw damper servo.
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Cincinnati, OH, KHAO
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  #3  
Old 08-31-2015, 09:56 AM
Gizmos Gizmos is offline
 
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Default Is this the section

I found page d-4 figure d1.4 shows pin 11,12,13 and 14 to switches and trim motor. These pins are on the gsa28 servo. If so, do you have to wire these pins to a ray Allen relay deck to allow both pilot and copilot to have trim switches on their sticks?
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  #4  
Old 08-31-2015, 11:27 AM
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DaleB DaleB is offline
 
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Location: Omaha, NE (KMLE)
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Quote:
Originally Posted by Gizmos View Post
I found page d-4 figure d1.4 shows pin 11,12,13 and 14 to switches and trim motor. These pins are on the gsa28 servo. If so, do you have to wire these pins to a ray Allen relay deck to allow both pilot and copilot to have trim switches on their sticks?
Yep. That's in there too.
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
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  #5  
Old 08-31-2015, 11:43 AM
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Raymo Raymo is offline
 
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Location: Richmond Hill, GA (KLHW)
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Quote:
Originally Posted by Gizmos View Post
I found page d-4 figure d1.4 shows pin 11,12,13 and 14 to switches and trim motor. These pins are on the gsa28 servo. If so, do you have to wire these pins to a ray Allen relay deck to allow both pilot and copilot to have trim switches on their sticks?
Yes, a relay is still required, per installation instructions. There are a number on the market, including the RA brand. I opted for a single board that will handle both trim servos and flap control from either stick.

There is a way to wire both sticks to control trim without a relay. A search of the forum should bring it up.
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RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
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Old 08-31-2015, 11:52 AM
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sbalmos sbalmos is offline
 
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What board is that, Ray? I'm finishing up my wiring pinout assignments, and was about to order separate RA relays for the trims and flaps.
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  #7  
Old 08-31-2015, 12:14 PM
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Raymo Raymo is offline
 
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Quote:
Originally Posted by sbalmos View Post
What board is that, Ray? I'm finishing up my wiring pinout assignments, and was about to order separate RA relays for the trims and flaps.
This site has single and three axis relays.

EDIT: In the interest of competition, PH Aviation also provides nice relays.
http://www.phaviation.com/
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Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)

Last edited by Raymo : 08-31-2015 at 12:20 PM.
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Old 08-31-2015, 12:25 PM
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sbalmos sbalmos is offline
 
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... and now I'm going to have to go back to my notes, or do the research again, because I'm wiring my trim and flap switches to the VPX, then the VPX trim outputs to the GSA servos, and then the trim motors. I forget whether the relays are needed for VPX trim/flap wiring. Some nagging thought in the back of my head seems to say no.
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  #9  
Old 08-31-2015, 12:39 PM
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Raymo Raymo is offline
 
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Quote:
Originally Posted by sbalmos View Post
... and now I'm going to have to go back to my notes, or do the research again, because I'm wiring my trim and flap switches to the VPX, then the VPX trim outputs to the GSA servos, and then the trim motors. I forget whether the relays are needed for VPX trim/flap wiring. Some nagging thought in the back of my head seems to say no.
No relays required when using the VP-X. If controlling the trim relays from only one stick or switch, no relay is needed. Flaps may need a relay, depending on the load capability of the switch in use. Stick grip switches may not be rated for the load, so a relay could be needed (as in my case).

I am using two Infinity grips and want full control from either seat so went with the 3-way relay from Composite Design. While reviewing the PH Aviation site, I noted they have up-stop limit switches so I just ordered one of those too.
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Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)

Last edited by Raymo : 08-31-2015 at 12:41 PM.
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  #10  
Old 08-31-2015, 12:47 PM
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sbalmos sbalmos is offline
 
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Yup, I'll need relays then. I want full trim and flaps controls for both sticks (Tosten CS-8, using the two side thumb buttons for flaps up and down). Going to be doing my instrument training in my bird eventually, so the pax is my instructor.
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