Paul and Georges Almost done before assembly. I do have the end
shaft to be treaded 22mmX 1.5 for the safety nut and groove one one
side to lock it . Then treated and annealed both shaft at Rockwell
60. I will try to go at Sun&Fun this Saturday and comeback Sunday.
Few photos for your interest. JEAN PRUDHOMME Looking real Jean. What
does it weigh so far? I won't be at Sun & Fun this year. Too much
patent work. Filing world wide. Paul Lamar Jean I am Pascal from
France searching for a PSRU. Question: where did you find the bell
housing which seems to be die casting made? And where did you get all
these parts? Would be very interested to purchase a full set as you
show in your photos. Since Tracy Crook retired, I really don’t where
to find a planetary psru. If you can help, that would be great. I'm
looking for 2.71 - 2.85 ratio. Thanks Best regards Pascal
Jean
No Help? Is it a secret where you got your parts?
Regards Pascal
The bell housing is stock Mazda. The casting on the front is a sprint
car quick change rear end.
Paul Lamar
Thank you Paul I'll try to figure out on which trade mark car it is
used and try to locate in Europe. Pascal
I don't think they have sprint car racing in Europe. There is a whole
industry here in the US dedicated to small oval tack racing on dirt
and pavement. The power is up to 800 HP and the weight is 1300 pounds
or less. There are literately 100's of small oval race tracks around
the US.
It is a reflection of our disposable income as is private aviation
:-)
Also so called live rear axles are not common in cars in Europe.
They are disappearing in the US as well and being replaced by front
drive independent suspension.
Paul Lamar
Paul Could send me your casting dimension I am working also with
needle bearing but I can use the same housing and I am wondering if
yours can be use. The needle bearing I intend to use is the B-3612
eBAY Torrington they are at $19.40 EACH
JEAN PRUDHOMME
We don't have a casting. I suggest making the housing out of thick
wall aluminium tubing.
Read over this stuff. I suggest cutting the splines for the 2.85:1
planet carrier on the end of this McMaster shaft. It is hard so you
may have to send it out ans have it normalized. After you cut the
splines turn it down to 2.26 OD. Then have it hardened and ground to
2.500". See the attached timken engineering stuff. Same goes for
Koyo bearings
You can then use the EBAY bearings directly on the shaft. For the
prop flange end use two 38 pins 90 degrees to each other like Ross
did or use the extended point set screw trick. I suggest making a
static test rig for the extended point set screws and apply a 1000
foot pounds of torque. You can use your prop flange as one part and a
short length of tubing for the other part.
Paul Lamar
I already have a 2.250 4130 normalized tubing and I will get within
a day and I don't know the accuracy of the diameter. I saw in the
past you made a sketch for an aluminium made housing, could send it
to me with dimensions so I can check on the Rhino
JEAN PRUDHOMME
The zip has both IGES and 3DM files. Let me know if it loads OK into
Rhino.
Paul Lamar
Paul I did open both files in RhIno Thanks
JEAN PRUDHOMME
If you see anything in here you (or anybody else) would like.... let
me know as I have dwgs on all of it in Rhino 3DM or IGES format.
Paul Lamar
Sure Paul you can send it
JEAN PRUDHOMME
Which one? I sent a couple of dozen.
Quit using that cell phone for email :-) ROFL
Paul Lamar
Anyone so I can get dimensions of parts
JEAN PRUDHOMME
I have a bunch of different prop flanges. How do you want to attach
the prop flange to the prop shaft? What parts do you need dimensions
on? Some of the dimensions are incorrect. all must be checked.
I can't send them all. Too big.
Paul Lamar
Paul
I did order a2.5" od by .375 wall 4130 tubing
I will pressure fit both [prop] flange and the planet cage and one side
will be fix by cotter pins and welded together and I am guessing the
side planet will be more appropriate, the flange side with high tensile
screws plus one longitudinal shear pin for alignment both parts and give
more shear resistance.
Could you send me the shaft file details so I can open it on Rheno to
check bolt holes and length
Thanks
JEAN PRUDHOMME
That shaft is too big. I can't find a needle bearing to fit.
The largest I have found so far is 55 mm or 2.165 inch.
50 mm or 1.968 inch is more common. That would be a ground down
after hardening 2 inch tubing size.
Industrial Metals has 4130 2 inch tubing with .120 wall which is more
than strong enough.
You will have to tig weld a flange on like the Ross for the planet carrier.
Paul Lamar
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