wayne king wrote:

In my last e-mail I forgot to ask you abou this. An experienced "rotary head" as Osh.  said the spur gear PSRU was definitely  safer than the planetary.  If you went thru this b4  I don't want to dig it up but just give me a 0 or 1, thanx,  wayne

Was he selling a spur gear transmission? :)
The devil is in the design details. The vast majority
of geared aircraft engines have used planetaries.
Is a PT6 unsafe?

Paul Lamar ...No rotor no motor.

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