> Hello Paul
>
> If you have a drawing of a RV-4 with a turbo 13b stuffed inside
the cowl,
> would you please be so kind as to publish it here for me? My
primary
> interest is where to put the radiator - I do not believe in
aircon cores -
> in such a tight cowl. I would also like to have the throttle body
in the
> R/H (as seen from the prop end) cheek. I have the engine, is
between
> projects, and lust after a -4.
>
> Thank you and regards,
>
> Erik Snyman
> Messina
> South Africa.
>
> You will have a tough time doing that with the stock cowl.
> The turbo won't fit.
>
> Are you willing to change the cowl?
>
> IMHO you would be better off with a P-port.
>
> --
> Paul Lamar ...No rotor no motor.
Hello Paul
Thanks for the quick reply. If the cowl in your illustrations exists
in
real live, please give me the manufacturer`s info. I would swap it
for the
original in a flash.
Erik.
It is something you are going to have to make unless you can
convince Brian Trubee to make a mold and sell you a copy of his.
--
Paul Lamar ...No rotor no motor.
The cowl can be funny looking and still function well. This is a
400+mph airplane.. I think I've sent this before..
Anybody read the recent Sport Aviation article on plenum cooling a
Lancair?
Matt-
Tracy managed to get his 13b into the std cowl, albeit with all sorts of
funny bulges. A p-port with the plenum in the one cheeck, oil cooler in
the other, and belly rad might just work out!
Thanks, guys, for the info.
Erik.
Tracy had cooling problems. He used a water dribble system to cool it in the
x country races and at OSH where you might have to taxi for an hour. He
also never climbs out at max angle. Living in flat Florida he does not
find it necessary. Of course he did all this before 3D and the experience
gained on this news letter over the past ten years. The big cooling difference
is using a large frontal area, thinner rad with a Kays and London wedge
diffuser. See my Wankel cooling book on the Aircraft Spruce website
under reference books.
I think an NA can be done no problem as long as you plan ahead
with 3D and use a 16 inch spinner. It is what Boeing and Airbus do
now on airliners. Plenty of room. No cheeks. Just not a turbo.
The first five 3D's were done in July 2004.
Since that time I have come up with an improved MM design giving more
room for the exhaust and even a small internal muffler if desired. The
second five P-port 3D's where done in Jan 2007.
The last thing you should do is the motor mount so you are sure
everything that needs to fit.... fits. If you build the motor mount first
without doing a 3D you are doomed to do it over and over and over.
Once you come up with a detailed 3D follow it exactly.
It can also be done with foam mock ups if you don't have a 3D program.
Fit the motor mount in last. Either plan will save you a couple
of years.
I see nothing wrong with Brian's fiber glass cowl. I hope he does
not destroy it as it can be used to make a mold. Perhaps he will sell
it to you.
Paul Lamar ...No rotor no motor.
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