This is a better picture of the left upper mount.  Note that the cylinder

on the rear of the mount is 'slotted' (look CLOSELY) and is open for about
25% of the circumference.  This allows the rubber mount bushing to be
inserted to the back side of the mount.  This mount is to work similar to a
lycoming conical mount.

Ken Powell
kenpowell@aristotle.net

Ken,
Why not use the large aluminum lug at the top of the motor? (Alt mount?)  Looks
solid and well placed.

Bill
Long EZ builder & pilot
BSME, MSME
EAA Technical Counselor

Bill,
What you can't see from the pictures I sent is that the alternator mount (you were correct) is off center to the left by quite a bit; it is probably at about 25% of mass of the long block.  I honestly can't say that I ever gave this any consideration - it just didn't catch my attention due to the offset.  I would think that a mount point located here would cause a twisting of the engine during negative G's.  Also, I am trying to build everything out of 4130 - several of the guys (engineers and others) expressed concern about building mounts out of aluminum without performing some type of strength analysis which is way beyond my abilities.  BTW, I appreciate the engineers who look at this stuff and 'protect us amateurs from ourselves'.

Ken Powell
kenpowell@aristotle.net

 
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