Good evening Georges
I am using the mini stock side bell to built my gearbox and it
will be fine with the original RX_8 automatic transmission bell
housing which is very light.
by using the Speedway eng side bell housing it gives me the space
to interlock the rear trust bearing with threaded nut and lock
washer and install a helicoil gear or bevel gear to drive  the
prop governor.

Between the both trust bearing i can fit a pressure fit split
sleeve who will be incorporate a standard lyc or cont trust main
bearing to feed oil true the prop shaft.
I will insert 2 hight pressure oil seal to hold the oil pressure
from escaping each side of trust sleeve bearing
With the proper seal in front of trust bearing it can hold some
oil pressure which will counteract with the prop oil pressure
seal.

I still working on the design and i think by using the Speedway Engineering
mini stock side bell with the existing pre machine bearing size
who fit perfectly with the timken u497  1.771ID and 3.150 od
45mm by 80mm bought from www.markwilliams.com , it  can save
time and money for those who want to built their own drive
front and rear bearing are the same  so the prop shaft will be
1.771" od at both  bearings or one deep ball bearing and one axle
bearing depending if a pusher or tractor.

With Alibre i can not send you more information for now but when
i finished it  i will redesign on RHINO so it will be easier to
transmit the proper file.

I will change the sun gear trust arrangement by grinding the
tooths on small side so it will reduce the length of small
housing.

The side bell outside diameter is exactly the same as the  trans
bell housing 9"dia,

The mini stock side bell weighs 6 lbs and the trans bell housing
11 lbs so i think i can come up with a decent gearbox weight.
You don't have much news from me but I am still working on my project


Jean Prudhomme

Great idea Jean.  I'll use this casting to do all my
new PSRU designs. Saves a lot of expensive machining on
the housings.

It will work with Jeff's motor plate/motor mount.

Do you have a dwg on it? Speedway Engineering is local
to me so I can pop over there and have a look.

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I would use needle bearings instead and increase the hollow shaft size.
The closer the shaft size is to the prop bolt circle diameter
and the planetary carrier diameter the stronger and lighter the joint.

Paul Lamar