"DaveSproul" wrote in message ...
Actually, the early Cherokee 140s were certified for spins.

Wow. I never knew that. What changed later? The airframes were identical for
many years, right?

All the 140's were approved in the utility category up to 1950 lb gross weight.
The 150 and the 160 were only certificated in the normal category (making
them not spinable). Might have been that the empty weights crept up so
high as to make the CG envelope of the utility category fairly unusable.
I know that my Navion has a utility envelope that's only places gross only
a couple of hundred pounds over the empty weight...I could only get in it with
minimal fuel and no passengers/baggage.