Perry Mick wrote:

Here is the latest drawing of my new engine mount for the LEZ, and the
new rad that doubles the volume. This new volume is in the ballpark of
what is in the stock 2nd gen car rad. Shown are the inlet ducting to the
rad, without the side walls.

Perry

Here are my suggestions.
We came up with an easier way of doing that MM after that rectangular beam scheme
was originally proposed on here. Namely take the lower MM tubes loads down to the 
landing gear bolts. Do away with the two vertical rectangular beams. Much lighter 
simpler and much less welding. Here is one 3D of the new design and a picture of the cut 
away hell hole. Make a couple of 4130 cups that go under the nuts on these landing 
gear bolts. Strongest place in the whole airplane. Makes it easier to service stuff in the 
hell hole too. The P51 type side beams give clearance for a muffler. Are you still using
the stock exhaust manifold? If you decide to go with a muffler in the future
the P51 type side beams will help. Jerry Hey can sell you a cross beam that
goes between the gear box plate and the back of the engine that you can cut down
to your needs. Or you can have one bent up locally. I can send a drawing of that.

If you double the thickness of the rad that will restrict the air flow more
and your NACA duct will work worse than it is now. The ducted fan
did a good job of sucking air into the NACA duct and through the rad.
Without the ducted fan it will not be easy to get the air to flow through
that double thickness rad. The counter cross flow rad design is very good
however. 

Paul Lamar
 
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