Here is a photo of how the Solar T-62
turbine planetary is oiled.  The ratio is 10:1 and it runs with a pitch
line velocity  around 12000 ft/min.  The sun gear is not present, but
you can see the three brass tubes that squirt oil on the gears just
before they mesh.

Aubrey

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Great picture Aubrey. Did you take it?
Good analysis. I am surprised T62 APU operates at that pitch
line velocity. I guess that is about right since it is rated at
60,000 RPM and the pinion gear is tiny. Around 3/4 inch
in diameter. Glorified turbo charger :)

In the case of the T62, the dwg of which I attached, the
shafts of the planet gears are fixed to the case so the
pitch line velocity is indeed 12,000 FPM.
The output shaft of the T62 rotates in the opposite
direction to that of the turbine/compressor shaft.

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Aubrey, your mention of the T62 gave me an idea.
All we need do is marry a T62 without the burner
cans to a suitable large rotary engine such as
a three or four rotor and we have a cheap turbo compound
engine of around 500 HP or so with a BSFC of below .40.
Basically a T62 is a large turbo charger with gear box output.
The 10:1 gear ratio is perfect for a turbo compound
engine. I wish I had this idea before I spent
$7,000 on a small turbo compound gear box.

Do you know where I can download a dwg of the T62
with dimensions? I am working on a 3D.

I have a three rotor sitting in the hanger destined
to become a turbo compound three rotor :)

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I think we lucked out. According to this picture
the T62 turbine/compressor rotates clockwise. The gear box
reverses that direction so looking at it from this
perspective the output shaft rotates counter clock
wise. Turning the T62 around 180 degrees and connecting
the T62 output directly to the nose of the three
rotor e-shaft will work perfectly. Perhaps with a
flexible rubber coupling. Looking at the Mazda rotary
from the front of the engine (car) it rotates clockwise.
Perfect!

For a tractor airplane there will be a S duct to route
the exhaust down and under the firewall.

This is a perfect low frontal area engine for a wing mounted
twin as the exhaust can go straight back. All we need do now is
fabricate the intake and exhaust plumbing to convert the T62
back to a BIG turbo charger.

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It will be about the same diameter, length and not far off
the weight of a P&W PT6 with half the fuel burn. The
T62 APU weighs about 70 pounds with the burner cans and
the now unneeded starter and control box.

Retrofitted to a Beech King Air it will have about twice
the range.