Into the separate thrust needle bearing.  Same as the Ross.
Paul Lamar

I am now enlightened. for the thrust bearing I would still like to 
see one using the tapered rollers to prevent skidding and scoring of 
the thrust bearing at low lube levels. I'll see if I can find a bearing 
number we could use. Thanks Bill Jepson

That would up the cost. 
Also you have a preload and differential heat expansion problem with
tapered roller bearings. Here is an earlier concept using the light weight tapered
roller bearings with part numbers. It is better to use bearing lock
and replace hardened sleeves for the needle bearings if you are worried
about that. As far as I know nobody has worn out a Ross shaft yet.
It would probably be as easy to replace the whole shaft as the planet pinion
shafts are also welded to the main four inch prop shaft. They wear too.

Note also going just one inch larger on the shaft eliminates the
the steel prop flange and places the load directly into the prop
drive dowel pins. Also the bolts on the inner end are eliminated by
welding the planet pinion shafts to the prop shaft.

BTW I need to redo the 3D based on this dwg. I over estimated the prop
drive dowel pin circle diameter. Its looking better and better the more I get
into it.


Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.