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.

 ---------------------------------------------

 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

                        

Paul
I am sending some works  design for the propshaft which it can
give you an other idea for your project
The shaft can be made by Strange engineering also the nut and
the flange, this design as been already tested on racing car.
I think with all idea we can come to a safe and affordable gearbox

Jean Prudhomme

Thanks but I don't see any of these parts that I would want to use.
I like the Mini Sprint rear axle bell however.

Paul Lamar