I am Pascal from France and have the following question:

I received the data sheet of the gear reduction drive of the Ford E40D. But there are 3 planetary systems in it:

1)      The over drive planetary

2)       The front planetary (I think this is the right one)

3)      The rear planetary.

 I intend to build my PSRU for an RX8 engine with the ration 2.85, a kind of a copy of tracy’s design who unfortunately doesn’t produce it anymore as he retired.

Then I try to solve my problem by myself.

Which one is the good one??

Thanks for your help.


Best regards

Pascal

Pascal Virlouvet Project Engineering Manager,  GMT Packaging Operations

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Is kind of confusing. The very front planet set is the overdrive planet set.

They don't call it the front planet set because the second planet set was called
the front planet set for years and years long before there was an over drive version :)

The front planet or middle planet set is the one to use for 2.85.

So far nobody has used the over drive planet to my knowledge.

The rear planet is used for 3.12 and it is the strongest.

Now we can add France to the list of many countries making gear boxes for the
Mazda rotary engines used  in air planes :)

BTW I might add Tracy's was not the best design.

Paul Lamar

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