Vance Jaqua wrote:

 Paul - the expressions look fine, and I have to admit
that I have not tried to do the gyro precession loads.
That will take some research. The bending strength of
a 1.5 inch diameter at the low endurance limit of
60 ksi will still allow a cyclic load of over a ton at
an 8 inch overhang. I cannot imagine that normal gyro
loads approach that value. It turns an airplane end
over end in a "Lomchevoc" (sp?), but that is a
stalled, weightless, airplane. Of course if you lose a
blade at 3000 rpm that would be in the range of 5000
"G"'s and you will exceed that load about ten fold and
rip off the engine as well. The resonant stuff of
course can theoretically go to infinity without
damping (fortunately a very unlikely condition). As
you say - strong and stiff is cheap insurance Vance

Vance uploaded this quite awhile ago and it kind of dropped
through some cracks around here. Sorry Vance.

Paul Lamar
 
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