Paul I was wondering if you had a p-38 type intake and you're
radiators in back by firewall and some type of powered extraction nose
cone.
would this be something worth doing and has any body tried this(postive in
negtive out)?

clifton younger


I am not sure what you have in mind. Can you make a sketch?

Paul Lamar

I'm still at stick figures in the drawing department. what I mean is the
lower part of you're intake would be sealed as it makes the turn and goes
thur your radiators and in the engine compartment you could then have some
kind of turbine air extractor built in the nose cone
to power exhaust the air in the engine compartment.

clifton younger

I have no idea what you have in mind.

Paul Lamar


Cliff,

Are you talking about extracting energy from the airflow that goes through
the cooling system?
If so, then any type of turbine placed in that airstream will create more
restriction   and turbulence, (not a good thing) decreasing cooling
efficiency. Do you have Paul's book on cooling the rotary?

By spending a lot of time designing and testing, a well designed cooling
system will produce little or no cooling drag. That is a huge advantage
for
water cooled engine aircraft.

Less drag equals less hp consumed for a given speed.

Doug in Japan


No I'm not. I'm talking about decreasing the cooling drag and improving
the
cooling efficiency
hopefully with out costing all that much in hp power, on the order of a
power steering pump?

clifton younger



'lets see' how about this, have any of you guys had any experience with a
Kirby vacuum cleaner? Kirby's are a motor with turbine impeller attached
to
the shaft to create suction . I'm essentilly talking about doing the same
thing with aircraft.

clifton younger

There is no free lunch. That takes HP and adds weight.
Just get my How to Cool Your Wankel book and do it right :)
$30 special.

Paul Lamar
I have seen an article in a WWII vintage aircraft engineering
magazine on fan cooling radials like on the FW 190.  With ejector exhaust
the fan cooled engine had some thrust from the cooling system  (fan).  A
net gain in performance with the same engine power.  The weight and
complication might not be worth it in lower speed applications.  Devil is
in the details.  It is probably best to have fan cooling on air cooled two
strokes: liquid cooling would be better.

Murry I Rozansky