Jerry wrote:

Your drawing showed the S beam ends sticking through the sides of the
cowl so I had to deal with that first.     Until we  get the cowl
drawn as  it really is  we cannot have faith in the drawings
predictions.  The physical model  looks a  less alarming regarding

room

over the top.   Then there is the possibility of increasing the

spinner

diameter a TINY AMOUNT  and, at the same time,   raising the top of

the

  firewall  JUST ENOUGH to get what we are looking for while
retaining
the look of the Tailwind and the ability to see over the nose.  I

don't

feel I have exhausted my options  yet.

Paul Lamar responded:

I fixed the cowl even though that had no bearing on the real problem.

More bad news. Even my mail box intake manifold won't fit the
stock cowl. This one is made with the 3 inch center line radius
2 inch tube. Would be slightly smaller with the R$B Wagner pipe.

You will never see over the nose :) I can make a blocky cowl that
fits if that is what you want :)

If you're going to make spaghetti intake runners, why not make them
face
forward next to the starter, and use the cheek intake to feed it?

Russell Kent

Yes. I'll try that. You mentioned it before and I got side tracked with
the stock tail wind cowl issue. Good idea. Jerry will have to give up
one of his oil coolers or put a stock cooler alongside the rad
under the engine with longer cowl flaps.

Paul Lamar

Excuse me for not being blown away by the obvious to you which is not
obvious  to me in my shop at all.  I went ahead and added a 4 inch dia
plenum to the end of the intake runners.  It can be square, does not
matter. I kicked the end of the runner down with a 45º.     Once again,
here are photos of the actual, real, physical reality.  They  paint a
pleasant picture.   I accept that I may be guilty of some strange error
and that  you are right.  I have experienced that before.   But so far,
  it does not seem that way

   Again the tube represents the  line of the cowl.     Once you get to
the cool side, there is plenty of room for an air filter and ram air
too.  The cheek openings (2.75" x 7")  are sufficient to cool a Lyc
0-360.   The rotary oil coolers are expected to handle 30 percent of
the cooling load or  15 percent per each side.   I think there will be
plenty of air for them and   for the intake too.  Let us say I use half
of the cheek opening for ram air.  That is 9.5 sq inches of opening for
the ram air compared to 7 sq in for the three inch snorkel.   Or if 7
sq in is enough than the oil cooler can have 11.5 sq in.   What is
wrong with that?   Jerry

No the tube does not represent the top of the stock cowl.
The stock cowl drops down on both sides of the spinner.

Paul Lamar
 
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