Need to start a discussion about engine mounts

[fixnflyr]

I used that article to analyze the engine mount for "HEATSTROKE" when I built a new longer mount of 22", the old mount was 7.5" long. I needed to move the CG a lot. We have to do a 6G pull to qualify at Reno. It's raced 2 years after that. I designed it for 8G load/ 12G ultimate.
I bought a copy of Brune to check buckling allowances.
I had good success with no problems

 

[karmarepair]

The Briggs engines flying in Europe (Sd-1 and Luciole) use firewall mount, not base mount.
The vertical V-twins have numerous threaded holes for firewall attach on the engine PTO end. Sort of like the VW firewall mount on a Volkplane.

True, but for a variety of reasons, I'm driving the prop from the PTO end.
Did you post any pictures of your engine on your test stand?

 

[BBerson]

Did you post any pictures of your engine on your test stand?

The test stand was a 4x8 across the bed of my pickup truck. It was rigid and nothing like bolting it to the 25 pound fuselage that allowed shaking.

 

[karmarepair]

I'm also working on mounting a V-Twin, on a test stand, but aiming at possibly hanging it on a firewall eventually.
<Snipped >

Constructive feedback is welcome.

I've refined my model by making the lower supports continuous, and putting in the "Port" side isolators.

 

[Rockiedog2]

I like that.
My kinda engineering.