I was planning on composite or wood. The LAEV prop would be brilliant,
although coming out of a tailslide it is easy to do over 180 deg in a
second.... (I currently pull the power at the last moment for these as I
don't trust the lyco that much either). Don't know what the rate would

be

for a Lomchovac, but they are done WOT.

Martin Morgan

I am going on what the Skyranch Engineering  manual says.
They say, on page 436-437, that with a 40 pound metal prop
(blades only), a prop RPM of 1500, a five foot diameter prop and
a pitch change of over 60 degrees per second will permanently bend the
prop flange on a Lycoming. As I recall the bending moment involved is
600 foot pounds. They used a one turn in six seconds flat spin as
an example.

Paul Lamar

Yep, these are the reasons why Sean Tuckers' maintainance costs are around
$175,000.00 per year.  Also the reason I'm nervous about making the adapter
plate any less stiff.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

 
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