>
    http://machinedesign.com/ContentItem/69974/Flexiblegearsbolsterwindturbinereliability.aspx
     >
     > Matt Prather.
     >
     > The best thing I can say about that web site is; it is
    recalcitrant :)
     >
     > "The IFB consists of a double-cantilever pin supporting the
    bearing and gear.
     > The cantilevered pin attaches to the carrier wall, and a
    cantilevered sleeve
     > mounts to the free end of the pin. Gears and bearings mount on
    the sleeve."
     >
     > "Simply stated, external forces on the gear make "the pin bend in one
     > direction, the sleeve bend in the opposite direction, and
    misalignment
     > angle at the gear face remains virtually zero," says Fox."
     >
     >
     > Interesting design but certain mechanical things don't scale up well.
     > Most well designed planetarys have a certain amount of
    flexibility built
     > in to handle this problem. They also have straddle mounted pinion
    shafts.
     > I was rather surprised when Ford changed the low modulus aluminum for
     > steel in the planet carrier for the six pinion version.
     >
     > Paul Lamar ...No rotor no motor.

    Is this pin the same thing?
    http://www.compactorbitalgears.com/cog-flexible-pin.html

    Jeff


    Same idea different implementation. This is a single cantilevered pin
    and not a straddle mounted pin like the Timken implementation.

    Most of this is moot as modern NC tools can hold tolerance
    to .0005" or less. This may have been real important 30 years ago.

    The Ford planet sets (made by Toyota) have proven to be perfectly
    adequate
    for our needs.
    --
    Paul Lamar ...No rotor no motor.


I agree for basically all 2 rotor applications, and light(ish) duty 3 rotor.

Will the Ford planetary gear set hold 1000hp with the input turning
7000RPM and output down around 2000?  I'm thinking turbocharged/compound
4 rotor.  Needs a big propeller and consequently ~3.5:1 gears.


Regards,

Matt-

I don't think so. Take a look at Allison truck gear box.