Kevin, The prop has no airspeed limmits on
it. A little background. Circa 1963/65 Univair did the whole ball of
wax to certify the Aeromatic on a Beech 23 with 160 hp Lyc. They did all
the vibration testing etc. They accumlated somewhere between 50 and 100
hours of tests. The FAA then sent them a letter of approval to go for the
STC to put the prop on those engines. However Univair decided not to go
for it because they felt that there was not enough margain of safety.
Consequently they didn't apply for the STC. Vibration was the issue not
any stress problems. So, my goal is to solve the vibration issue instead
of trying to redesign it so as to make it hell for stout. Since stress is
not the issue then logically solving the vibration will make the two
compatible. Univair used a standard production Aeromatic for their tests
and they almost acheived the goal. So, I am convinced that a little
redesign of the blades will solve the vibration issue. I have built a
special test prop and am going to put it on a Lyc 180hp 0-360 for test
runs.
I have plenty of hubs. I am able to cover the
wood core prop with carbon fiber, have made several. I am working with a
group of experimenters on a solid carbon fiber blade. The cost is $4250
complete plus S&H.
Where are you located?
Kent
----- Original Message -----
Sent: Friday, December 22, 2006 5:41
PM
Subject: aeromatic
I would like to try an aeromatic on my
RV-6A. it seems that you currently don't approve of the O-320D2J 160hp
combination. will your props handle a 150kt cruise speed? what is
their practical top end? I don't own a hub. do you sell reman
ones, or do I need to find one first? what would this typically
cost? is anyone making lighter weight composite blades?
kevin lane n3773@comcast.net