X-Mozilla-Keys:
David E. Munday wrote:
On Tue, 17 Aug 1999 13:17:34 -0700, Paul <rotaryeng@earthlink.net>
wrote:
Not that I know of but I will ask tomorrow.
All our guys on our taxiway are pushing the envelope as far as flutter
is concerned. Klaus Savior is going 242 MPH with a Variez. Dan Wright is
getting ready to race his real slick SX-300 again. Dave Anders is not
on
our SZP taxiway but he visits frequently to get the latest tech.
He is worried that his new 500 HP Lycon souped up and turbo'd IO-550
in his Questair Venture is a bit much. We shall see at Reno coming up
the tenth of next month.
Just as a cautionary note: I just got back from the Society of Test
Flight Engineers conference in St. Louis where I attended a four hour
workshop on flutter testing by Maj. Bill Norton USAF. He wrote the
book, as in the book used by the AF test pilot school (as little as
they use of it). I great talk, but in four hours just scratched the
surface.
The guys doing this for the big boys with unobtainable dollars combine
some pretty sophisticated testing with sophisticated computer models
and sophisticated structurally similar wind tunnel models and they
still get surprised. They have even had cases in which they come down
through parts of the envelope which had been previously cleared and
encounter flutter (or limit cycle oscillation, which is a euphemism
for flutter that doesn't run away because it encounters some limiting
factor like the controls banging against the stops and changing the
resonant characteristics of the structure.)
This stuff is B-A-D bad. I plan to get his book and learn more. When
I find out where to get it I'll share the info.
______________________________________________________________________
David E. Munday E-mail: munday@engr.uky.edu
Dept. of Mechanical Engineering Web: http://www.engr.uky.edu/~munday
University of Kentucky Voice: (606) 257-3263
Lexington, KY 40506-0108 FAX: (606) 257-3304
Office: 202 D. V. Terrell Bldg.
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