I do like the idea of the end cap triangles on the angle brackets. Possibly
one may even be added to the center between the 2 bolts. Washers or doublers to
spread the load as per Lynn's suggestion is good to. I will also add the back
strap (doubler plates) as shown on the drawings for engines over 300 lbs. I did
a quick search for 1&1/2" 4130 in square tube at the usual distributors but
came up short. 1&¼” X1” is all that they show. If any body has a source for
this please do let me know.
thanks for your collective advice:
Michael Silvius
Scarborough, Maine
----- Original Message -----
Sent: Sunday, May 06, 2007 6:32 PM
Subject: Re: [FlyRotary] Re: Engine mount
mockup
Lynn,
Had the same concerns myself at first glance, but when
advised that it was standard on light weight engine mounts, I felt a little
better about it.
My approach would have been a piece of triangled 4130 - of
course this causes bolt/nut access problems, but could be overcome, in a
number of ways.
What it does give is a nice flat area on which to weld the
tubes as well as a wider area to spread the load and two bolts through the
firewall hard points, compared to one.
One idea might be a triangle with two small tubes to carry
the firewall bolts.
Just some of my thoughts on the subject, always looking for
better ways!!
George ( down under)