Dynon autopilot pitch servo installation in SS7?

[pilot5173]

Hey folks, I've searched the forum, but I'm coming up empty.

Does anyone have details on where and how to mount the pitch servo for the Dynon autopilot? I've seen a couple of comments, but details are lacking. A couple of pics would be greatly appreciated.

Thanks!

Darren

[Eric Page]

If you're talking a out a Series 7, Kitfox has a servo installation kit with fabricated and powder-coated brackets that do the job very nicely. They might even sell you individual part numbers from the kit if you ask nicely.

This is what I did for the pitch servo in my Series 5:

IMG_1263.jpg
IMG_1264.jpg
IMG_1270.jpg

That's a length of 1-1/2" aluminum angle (Home Depot), held in place on the fuselage tubes with Adel clamps. The servo arm will connect via a rod-end bearing to a pushrod, which will grab the elevator push-pull tube via a large-diameter Adel clamp. The large black tube above the servo is the elevator push-pull; mine is painted.

Edited to add: Don't buy the installation kit unless you're building a Series 7. The S7 has fuselage tubes for mounting the brackets that are missing in earlier models. Ask me how I know...

[68niou1]

I have the Kitfox ones and they are very nice, If you need better photos I can get you some. Also Dynon calls for a SV32 but don’t go lighter than a SV42 on the Pitch or it will slip like crazy and you will be upgrading. Dynon is awesome to work with though!
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[68niou1]

4584926F-1890-4F6F-AC61-A5FC865FCCE9.jpg
Here is the other side view. If you want better views I believe Bryan Bowen used the same ones in his Project Kitfox videos if I am remembering correctly. Hope this helps-

[desertdave]

Not the best picture and it’s a Garmin servo but I located my pitch servo under the pilots right thigh. I have seen Dyson servos mounted in the same place.
IMG_4829.jpg

[pilot5173]

Thanks for the replies! I found the following YouTube video (starting at the 16 minute mark) which shows installation of the Garmin servos using the mount from Kitfox. Looks pretty straightforward, but need to see how difficult that is to add since mine has the fabric installed.

[ckpankratz]

Eric, old post, I know. However, I'm just getting to this step with my own Series 5. Thanks for the photos of your installation. Do you happen to have photos that show how you connected the servo arm pushrod to the elevator push/pull tube?

Many Thanks,
Chris

If you're talking an out a Series 7, Kitfox has a servo installation kit with fabricated and powder-coated brackets that do the job very nicely. They might even sell you individual part numbers from the kit if you ask nicely.

This is what I did for the pitch servo in my Series 5:

IMG_1263.jpg
IMG_1264.jpg
IMG_1270.jpg

That's a length of 1-1/2" aluminum angle (Home Depot), held in place on the fuselage tubes with Adel clamps. The servo arm will connect via a rod-end bearing to a pushrod, which will grab the elevator push-pull tube via a large-diameter Adel clamp. The large black tube above the servo is the elevator push-pull; mine is painted.

Edited to add: Don't buy the installation kit unless you're building a Series 7. The S7 has fuselage tubes for mounting the brackets that are missing in earlier models. Ask me how I know...

[bbs428]

Hey Chris,

Here's how I attached the servo arm to the elevator pushrod.

I made an aluminum bracket in such a fashion that when tightened, it clamped securely to the pushrod. Just before the plane was covered with the stab/elevator on and hooked up, I positioned the bracket on the push/pull tube, so the servo arm was in the middle of its throw, checking that the elevator was also in its neutral position before tightening the clamp bracket.
I did have to extend the servo arms slightly on both pitch and roll servos.
My mounting brackets were homemade, and all the bare aluminum was treated with alodine.

Hope this helps!

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[Eric Page]

I'm probably going to do something very similar to what Brett shows in his post above. I have it mocked up right now with an MS21919 cushioned clamp around the push-pull tube, but I don't really like it that way. Brett's idea has a much larger grip area around the tube.

[ckpankratz]

Outstanding. Great idea, Brett. Did you bond the alodined clamp to the push tube to avoid potential slippage?