Dick Gregory wrote:

Hi all,

A bit of rambling here. Any advice is very welcome.

My 13B is scheduled to be delivered on Thursday. I have been holding off on
some of my design decisions until I can get a physical look at how things
are going to fit.

Since the LongEZ firewall is so narrow, things are tight. I really wanted to
eliminate all bumpouts on the cowling, but I don't think it can be done.
Also, you guys have convinced me to keep the male belly scoop instead of the
NACA design. In addition to the belly scoop I will need one for the oil
cooler. I plan to put this one under the left strake similar to Perry's. I
don't know whether to draw induction air from one of the scoops or put a
separate one under the right strake.

I think I will put a bumpout under the bottom corner of both sides that flow
back from the scoops. This will provide room for the oil cooler ducting on
the left, and a muffler on the right.

I am considering a radiator from the Chevy S-10 pickup. It is 15 by 26.5
inches. 1 inch or 1.125 inches thick depending on transmission and A/C. I
wanted to mount it horizontally above the belly scoop for updraft air, but
that would make the cowling very fat close to the prop. If I drop the front
to the bottom of the scoop and raise the back just below the redrive I can
get a much better taper. This means downdraft air. Will I have problems with
debris damaging the radiator in this position? Perry, what kind of results
have you seen so far with your new setup?

Ron Gowan, are you on this list? Did I hear that you are changing yours from
plugs up to pan down configuration? If so, do you have any magical solutions
to the space layout challenge?

Dick Gregory
LongEZ N613NC
Houston, TX

Sounds good so far. I don't think Ron Gowan is. At least under the
name Ron Gowan. Want some more pictures of Perry's set up?
Here is a good picture of his motor mount on the test stand.
It is a bit overkill and one could go down on tube size to about
5/8 inch OD.

BTW Perry did you ever get around to measuring the air pressure
in front of the oil rad?

Paul Lamar
 
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