Re: Lift Tabs Etc

David A Froble

Ken Miller wrote:

Message text written by INTERNET:N2284Y@...
some distance from the rest of the plane and the incident was caused by severe turbulence at the time.
Does anyone have any feedback as to the failiure mode??
Was it the attachment hardware ??<
The last report I read indicated the canard departed the aircraft after
turbulence-induced flutter of an elevator. Large chunks of F22 were found
still attached to the lift tabs, So the attachment system worked. Not so with the Airbus 300 that crashed in New York. Some theories point
to rudder flutter, which removed the vertical fin at the attach points. There isn't a structure out there that can withstand fully divergent
flutter of a control surface.
Ah Yep! Fully divergent flutter would probably turn a rock into gravel or sand.


David Froble Tel: 724-529-0450
Dave Froble Enterprises, Inc. Fax: 724-529-0596
DFE Ultralights, Inc. E-Mail: davef@...
T-Soft, Inc. 170 Grimplin Road Vanderbilt, PA 15486

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