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Engine mounts sagging

Discussion of the Aerovee kit engine.
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Re: Engine mounts sagging

Postby loutoth » Tue Aug 27, 2024 12:24 pm

I had the same problem with engine sag with the prop hub rubbing the cowl outlet after about a year of flying. I turned Delrin rod on a mini-lathe for a tight formed fit & used the Delrin mounts in conjunction with the Sonex rubber mounts. Top mounts have Delrin forward with rubber behind and the bottom mounts have Delrin back and rubber forward. Engine smoothness is the same with no sag. Other Acetals may work also, but I found Delrin easier to cut & machine / shape, and is self lubricating.

https://youtu.be/_runJ37Lg70

https://www.kitplanes.com/toth-sonex/
Attachments
IMG_1659.jpeg
Bottom Mount Larger
IMG_1657.jpeg
Delrin Isolation mounts
Last edited by loutoth on Tue Aug 27, 2024 12:38 pm, edited 1 time in total.
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Re: Engine mounts sagging

Postby Bryan Cotton » Tue Aug 27, 2024 12:35 pm

That's a great idea Lou! The video link was cool, was that supposed to be bushings or the speed record?
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
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Bryan Cotton
 
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Joined: Mon Jul 01, 2013 9:54 pm
Location: C77
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Re: Engine mounts sagging

Postby loutoth » Tue Aug 27, 2024 1:37 pm

Hi Bryan,
Maybe the speed record wore out my rubber bushings early? Not really....
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Re: Engine mounts sagging

Postby Bryan Cotton » Tue Aug 27, 2024 2:28 pm

loutoth wrote:Hi Bryan,
Maybe the speed record wore out my rubber bushings early? Not really....

Undoubtedly! I just figured out that the youtube link was in your signature.

A quick progress report on the Super Pro bushings, I have about 200 flight hours on them now and no sagging.
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
User avatar
Bryan Cotton
 
Posts: 5535
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77
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