Paul,  Nearly there, well the first one anyway to stick on my test bed
and see what flies off.

3.17 reduction.


Neil.

Beautiful Neal.

I doubt anything will flies off other than the airplane :)

Is that a one piece billet input shaft and Sun gear?

Is that a one piece billet prop shaft?

Nice to have a big powerful lathe.

Are those oil  pressure fed prop shaft bearings?

Can I have another cross section straight on from the side?

Got weights on everything yet?

Is that Solid Works or Rhino?

Paul Lamar



Paul,    The input shaft is a one piece machined from shaft and the gear
cut.  Prop shaft is also a one piece as that came in at the cheapest and
safest.  Prop bearings are pressure fed from the engine along with the
thrust bearings.  Thrust bearings will stand 2 ton at 5000 rpm. Weight is
all theory at the moment, the actual will remove all speculation, but
hoping
to be lighter than Tracy's.  This is being made commercially, so not sure
what CAD they used, but not Rhino, sorry.  The housing is also from a
billet, not cast.  Still looking for cost savings.

Neil.

Nice factor of safety of 4  since max prop thrust is only
about 1/2 ton.

An IGES interchangeable  file protocol is available from most 3D dwg
programs
and that would be acceptable for Rhino. Ask the designer for an IGES
and then compress  it using zip.

 If I had that I could load it into Rhino and Rhino would calculate
the weight of all the parts.

Are the thrust bearings ball or needle? They appear to be ball.
Either will work but maybe the life would differ. Static thrust
capability  is
usually much higher than it is at 2500 RPM.

http://www.mitcalc.com/doc/bearings/help/en/bearinginch.htm

Paul Lamar

Paul,  Yep the thrust bearings are ball race. Could not get needles to do
the job, unless very heavy.  Neil.



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