Bill,
I'm not a mechanical engineer nor do I play one on TV but I believe that the standard for engine mounts are designed to withstand a minimum of 9 g's due to the high vibration environment. If the aircraft was intended to do aerobatics them I would guess that to be even higher.
When I asked the designer of my aircraft to designate the tube sizes for the mount that I designed he used 9 g's for his calculations.
Jim
"BillDube@killacycle.com" <billdube@killacycle.com> wrote:
Since I'm playing around with making my own engine mount, I looked
carefully at the engine mount in your CAD drawing. I have a couple of
questions.
1) Did you do a finite element analysis on the mount you have drawn?
2) I don't see anything aside from the one C channel supporting the engine.
I don't understand how this would be able to react the loads.
I'm in the middle of modeling the standard RV-7 Lycoming Dynafocal mount
so I can do FEA to determine what g loads it will withstand and what it's
vibrational modes are. When I finish "reverse engineering" the standard
mount, I'll design my own RX-8 mount to withstand the same loads.
Any clue what sort of loads one should expect the engine mount to withstand?
Bill Dube
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