I found that 3D's are wonderful when checking a mechanical design.
You can do a virtual assembly to find mistakes and see if
it is possible to assemble things. I have found several mistakes so far
on this turbo compound gear box. One of the mistakes was my failure to allow
room for the lube oil to circulate.

In the old days prior to 3D computer programs
we used to make the parts and then make them over and over again
until everything went together and fit.

Doug and Ken if you guys are building PSRU gear boxes let
me know when I came back from Sun & Fun and I will see if
everything fits and goes together OK.

Paul Lamar ...No rotor no motor.

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