Bookworm - NACA "Consideration of dynamic loads on the vertical tail by the theory of flat yawing maneuvers"
Congratulations! What a great find!
I found the underlinings in another
version of the report interesting!
This report does not seem to be amongst the NTSB on-line documents. I wonder if the NTSB/NASA were aware of it. Full rudder "fishtailing" was described at the NTSB hearing as having happened and discussed at length, but no mention of this report.
If I understand the last para before the conclusions correctly, a prevoius US Army Air Force report had already studied the effects and dangers of "fishtailing" the elevator. As I mentioned in a previous post, a current Boeing document warns against "fishtailing" any of the controls.
It was common in the 1940's for large a/c to have twin or triple fins. Was that done for structural reasons? What about current twin-finned fighters?
Once again, a great find!
