Paul
 I am sending you the last design wich is an idea of George Grimes to
 use regular car engine crankshaft main bearings.
 I was looking to use the main bearing of an 10-540 and the price is
 about $300.00 with taxe and you can buy full set of car bearings for
 $35.00 each.

 I am using 4 set of bearing may be is enought or 5 set may be required.
 I looking to secure the planet with the crankshaft with woodruff key set
 at 2 or 4 places or splines, and machine longer small gears shaft on the
 planet and insert on crankshaft back plate.
 I can use both side of the trust engine bearing but i need an other
 trust bearing on back of the planet face .
 If i go this way i will have to make a mold for a casting.
 Make a look on it and i am looking for your comments.


 *Jean Prudhomme*

 Very clever idea George. I think this will fly. I am impressed.

 I like it.

 It occurred to me to use the stock Lycoming front bearing shell
 but this is better and cheaper.

 I have added some attached 3D's for this type of PSRU to your three dwgs.
 I was just going to get a junk Lycoming crank shaft and cut
 off the cracked back of it :)

 You won't need any castings as the housing is 2 pieces.
 I think it can be done out of billet on an NC mill.

 Paul Lamar


Paul
On the first dwg i show a possibility to use the trust on both sides of
main bearing where the oil pressure inlet tap but we have to allow some
clearance for the prop shaft expansion what do you think ,but we need the
rear trust bearing to hold the planet in place.
Your comments on woodruf keyway between planet end shaft and the
prop shaft do i should go with this or splines wich is more machining and
cost?


*Jean Prudhomme*


I would not do either splines or keyways. They are not needed.

Since you plan on machining the prop flange anyway just
machine the other end with a flange large enough
to drill and tap to take the pinion bolts/shafts.
Off the shelf shoulder bolts will work.

That is the benefit of having a split housing.

You can then use a stock Lycoming 2 piece thrust bearing shell.

BTW folks don't get this constant speed PSRU confused
with a fixed pitch prop PSRU.

Paul Lamar