X-Mozilla-Keys:                                                                                 

George Graham said if he was designing for direct-drive he would use the
Mazda transmission in 4th gear.  Chuck Harbert says I need to add
bearings.

Both of these solutions defeat the simple approach I was attempting,
which means if there is a real mechanical problem here, the approach
needs to be abandoned.  There is no reason to retain direct-drive/ducted
fan, if the rotary cannot be operated in this mode without engine modifications
or  mechanical add-ons, which I am not equipped or prepared or qualified
to do.

Paul wrote:

Unless of course you want to replace a gas turbine core engine in a
turbo
fan with a high power turbo rotary such as Jim Mederer is developing. In
that
case a gear box that could handle 900 HP is too costly and too heavy
so ducted fans then make more sense.

Perry Mick wrote:
So if Jim is driving that ducted fan directly from the engine, what is
he doing differently than me?  We still don't know if I have a real
or imagined problem.

--
Perry J. Mick
Mick Duckt N7XR
http://www.mickaircraft.com/duckt.htm

Jim is not at that stage yet Perry. I suspect they will use a system 
like the Ramona ducted fan with  a sheet metal housing and an outboard
thrust bearing. Don't panic yet. Yours is such low power and the e-shaft
is so much better than a crank I think Bill is being a little too 
conservative. Keep an eye on those main bearings and stay within
gliding distance to that wonderful long runway you have to work with
there at Macminville. BTW what is the runout on your prop extension?

Paul Lamar
 
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