<big snip>
I'll work on those numbers for the 900 HP 3 rotor.
That is real interesting on the small diameter variable pitch prop.
As fate would have it Butch is working hard on a variable pitch prop
design as we speak. Hopefully he will have the prototype done by Sun & Fun
and will be able to display it there.
The parts in this picture are from a earlier, now obsolete prototype.
(too heavy)
This is all I have on the R3350TC fluid coupling.
You can just barely see the fluid coupling.
Paul Lamar
Ever seen one of these turbine units on the surplus market? Why not just
hang this thing on the back of a rotary? Put a new spur gear on it and tie
it into the ring gear. Close the whole bellhousing in and incorporate it
into the oil pan. Spray lube the gears and let the fluid coupling drain into
the bell housing. Might have to use some different material for the ring
gear. The main thing that interests me is the fluid coupling. You could just
use the turbine and center section from a turbo, then use a fluid coupling
between it and the ring gear. 12 to 1 at 6000 rpm is 72K turbine speed. That
should be achievable. Even 10 to 1 would give a useful turbine speed. The
main thing missing is a good fluid coupling design.
Monty
Sounds like a good idea. All the good ones are worth their weight in gold
unfortunately. I know where I can probably find one. Camarillo airport
here in SoCal has two Connies with some spare parts lying around.
I would do away with the fluid coupling and use the turbine directly
on an extension of the E-shaft. 8000 RPM for a 14 inch turbine sounds
about right. The R3350TC only rotated at 1800 RPM so they had to have
a gear box and fluid coupling. That R3350TC blow down turbine is about
a foot in diameter or more. A 14 inch turbine blade is going 29,321
feet per minute or about 490 feet per second or about 330 MPH at 8000 RPM.
If the lift coefficent is one on the blade how much torque could we expect?
Assume the exhaust gases were say 600 MPH with a two inch diameter pipe.
Keith Black says it can be cooled half the time so exotic material are not
required. I was thinking of investment cast SS turbine blades.
Paul Lamar
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