In front, on top, and behind the oil cooler, all
kind of look like laminar flow airfoils.

Tony

That is the early P51. Models after the war had
K&W curves as did the B36.

Paul Lamar


Hi!

Constructing low turbulence wind tunnel and measured air
flow separation. I guarantee that in expansion part of
presented channel there will be a fluid flow separation
which will parially shadow cooler. Please, put turbulators
inside surfaces at the start of air expansion area. It can
be any kind of parts cca 1-2mm in diameter. Make this
surface section rough.

B.r.

Viktor

Faculty of Mechanical Engineering
University of Ljubljana
Slovenia

This is no longer necessary. In fact it slows the flow into the duct.
Viktor, IMHO you have been isolated through no fault of your own
for the years 1945 to 1990 and missed some developments
in Aerodynamics. Two major books were published in English
by German scientist that have become classics. "Fluid Dynamic
Drag" by S. Hoerner in 1965 and The "Aerodynamics of Propulsion"
by Kuchemann and Weber in 1953. These men did applied research
on flow inside diffusers. I republished some of this work
in my book "How to Cool Your Wankel". Some of these books
are available from time to time used on the internet but
quite expensive.

Aerodynamics of Propulsion By Kuchemann and Weber is
near impossible to find.

There is only one copy of Fluid Dynamic Drag by S. Hoerner
in bad shape for $75 on Ebay. 9 days left to bid.

Item number:    130358647707
Item location:    Palm City, Florida, United States
Ships to:    United States, Europe


Do you plan on attending Aero in April at Friedrichshaven
this year? If so I will put the books in my luggage and
we can get together and discuss them when I get there.

Pipistrel, made in your country. is doing very well selling
light sport aircraft world wide. They had a large presence
at Aero last year.


PIPISTREL d.o.o. Ajdovšc(ina
GORIŠKA CESTA 50a
SI-5270 AJDOVŠC(INA
SLOVENIA
tel.: +386 5 36 63 873
fax.: +386 5 36 61 263


Paul Lamar