Here is another sketch of a six pinion planet carrier for
Ross/Ford C6 type PSRU's. The Ford C6 auto transmission comes with two,
almost identical, planet carriers. One has four pinions and the other
only three. Therefore each transmission has enough parts to make this
planet carrier.

I bought a "core" C6 for fifty bucks. The bands
and clutches were shot but the gears were in perfect condition.
(No! I did not magniflux them :-))

This is intended for a super charged three rotor. It should have
50% more torque capacity than the four pinion C6 versions.

See my web page for a picture of the stock gears.

BTW I might mention why I prefer a planetary PSRU. A spur gear
has only one line contact area between the two gears. This one line
contact takes all the contact, shear and bending stresses. Therefor the
gears have to be large and heavy.  A six pinion planet with the same
size gears has 1/6 of the stress so it can be much smaller and lighter.
This may seem obvious but I think it is worth mentioning here.

Paul

Hello Paul
I certainly do not challenge these points but wouldn't you be willing to
agree that every engineered solution is a compromise of competing factors
and that in many cases, the priority that is attached to the factors comes
down to personal choice. My priorities are: 1: ratio; 2: rotation (with
adequate durability a given and yes, "Buy Canadian" is last on the list).
Even packaging considerations are lower for me.
Still very much appreciate your analysis and input.
Peter.

 
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