Paul,
OK don't laugh. Here it is. I stole more parts from you then I actually
drew:) I still haven't figured out how to insert a hole in a solid using
Rhino:) Logic ditates to design in two D and expand the drawing. Ie
another
prop hub.
The retaining nut, explanation text and the threads didn't show up
well. I
now know why. Basically a the design has splined shaft idea with
retaining
nut and safety allen screws though a number of other options exist.
Since then I have found a picture of a planetary gear driven engine
made in
the 1960s and used on the AERO Grand Commander. Notice the large thick
front plate. I wonder if it is taking some thrust?
The IGSO 540 is supercharged 380Hp.. That shaft definitely had C/S prop
hubs on it:)
I'll check on the maximum part dimensions the stereo lithography
machine can
do. Another option for the PSRU is to have
Doug
OK the way you insert a hole in a solid is you make a solid cylinder
the right diameter
longer than the solid part. Juxtapose the parts. Select "Difference"
under "Solid" .
Select the solid part you want to keep first. Then select the cylinder.
I don't think you are understanding the only way to transfer high
pressure oil from the
engine to the center of a hollow shaft is use a plain journal bearing.
Needle bearings
won't work. If you are using plain journal bearings anyway you might
as well use
a plain thrust bearing as well both pusher and tractor.
This will only work with a fixed pitch prop.
Paul Lamar ...No rotor no motor.
Just a comment on NURBS and booleans, when you use them ( boolean )
your limiting or removing the ability to modify that solid at a later
date. A better way to do that and retain the ability to edit the solid
later on is to use a trim or split function. then use join if you need
to make it a 'solid'. You would do the same setup as boolean in terms of
slecting a positive and negative object you would just use the
trim/split on step 3 instead.
Ian
BAS
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