I am looking at using an Aeromatic wood prop. I know a guy that makes
these propellers and he has a lot of the original hubs to build props
from. He tells me that the 8 bolt pattern is not used much (I think
they were used on the Franklin engines) and he will let me come in
and build my own prop with one of these 8-bolt hubs. Will the Ross
copy PSRU's be built so that flange could be drilled to accommodate
the hub?

BTW. this guy has been experimenting with the original Aeromatic
design and he claims to have made some improvements that I think are
fairly significant. He claims that IF, IF the prop is adjusted
correctly and IF the engine is turbo normalized, he can make the prop
work exactly like a CS with the exception of no cockpit controller.
For non turbo normalized engines he has an altitude compensating
adjuster device that will automatically correct the propeller
adjustment to compensate for power loss at altitude. The altitude
compensating device has not yet been flight tested though. If all
this is true it might be worth looking at. No hollow crankshaft, no
prop governor, no electric controlling system. I don't know the
weight but he claims it is about half the weight of a CS. he sells
them installed for $5350. Not sure how this measures up to the
electric composite propellers.

Paul Shamlian


Yes I can do that as in the Ross design the prop flange is a separate
part.

Paul Lamar



Mr. Shamlian,

I would be very interested in contact information for this individual
who is improving the Aeromatic design.   Thanks.

Gene Kahn