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

  I  clamped a straight edge to the backing plate and laid the tube
on
it not on the edge of the backing plate.    The straight edge  is
4.5
inches from the center, or the equivalent of a 9 inch spinner or the
rough equivalent of the cowl height outboard of the 12 inch  spinner
ring.   Jerry

Now we are getting somewhere. Your sketch is not to scale and or is
wrong on
the bend shape.

Is my drawing correct as to the thrust line relative to the top of
the
firewall?


Paul Lamar

I  intend to take a section out of the bend.  I know you do not like
this but I am willing to see how well I can do with it.  It is not a
simple section and reweld.  I will have to add material to the inside
and blend and shape before rewelding.   If that does not work, then
perhaps the 1.5 i.d. from Wagner.  Jerry

You don't need to do that. Just tilt them back at a 20 degree angle.
puts them back under a higher section of the cowl.

Here are the 3D.

Paul Lamar

Thanks Paul,   I am glad that it is possible.   The scoop is very
efficient and easy to install.  I still can't get used to the look of
it.   It is an option, for sure.   Jerry

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