Bertie the Bunyip wrote:



Like DC6's and Connies and such? Oh yes, they definitely were. It was a
requirement of the period. The old ATC system was the same regardless of
the aircraft size and was in effect until the late forties. I believe
the last aircraft to be certified under that system was the Fokker F-27.
There has to be some sort of spin testing even now. I've done full stals
in jets after deep maintenance, so they had to have had some exploration
of spin entry tendencies, but the old airplanes were spun, regardless of
size, if they could be spun. I think the only US certified airplanes
exempt were the Ercoupe, the General Skyfarer and the Gwynn Aircar, all
because they couldn't be spun.
I know someone who works at Boeing,or rather did, and I've often
wondered how deeply they went into it with the current crop of
airliners. I'll ask him next time i talk to him.


Bertie


Interesting. Now I'm wondering if the spin testing involved fully
developed spins or incipient spin entry.