I think it is thin enough Mike. Are you taking air in at the bottom?
What does your duct look like in side view? Where does the air exit?

Send us some pictures if you don't mind.
If they are too big to publish I can crop them a bit.

 Paul Lamar

Mike Wills wrote:

  I have the engine mounted on the airframe but dont have any of the
systems installed yet. Here are a couple of pictures (I need to drag it out
in the driveway and snap a few better pics). The foam slab under the engine
simulates the radiator. The smaller foam piece in front of the rad
simulates the oil cooler. I plan on using a Setrab oil cooler 16" X 7 1/2"
X 2". After I get the rad and have it mounted I'll work on the ducting
next. No bucks available for Tracy's PSRU yet so I'm simulating it with
wood. The wooden disc should be approx where the spinner backplate will be
located. I'll be using a 16" spinner.

  Unlike the drawings on ACRE, I plan to take air in through the top of the
radiator (air inlet under the spinner), go down through the core, and exit
in the stock RV location at the bottom rear of the cowl. There are a lot of
reasons for this; Ive spent hours on end eyeballing this to come up with a
plan to fit everything under the cowl. As Tracy has said, its amazing the
snowball effect that takes place when you commit to a certain idea and how
that impacts everything else.

  One of those decisions is my plan to mount the muffler under the rad. I
couldnt see a way to make it fit along side the engine as you recommended
without resorting to either a small restrictive muffler, no muffler at all,
or an ugly bulge on the side of the cowl. Also Im still toying with the
idea of using augmentor tubes to help get the exit air out of the cowl,
particularly during ground ops, and this also dictates an under the
airplane exhaust exit.

Mike Wills

Be careful. That muffler radiates a lot of heat. That is the problem
Everett had. Exhaust pipes too close to rad.

I like your motor mount. Straight forward and to the point.

Paul Lamar
 
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