Having spun 150's numerous times
over the years, I personally have never
had a problem provided the recommended
procedure was carried out. It is likely
that a misrigged aircraft may lead to
an abnormal recovery sequence.
I've never noticed a tendency to flatten in
a 150. I was a passenger when
a friend of mine spun a 150 from
12000',
We were exploring the absolute ceiling.
After a botched recovery we continued
inverted recovering at about 4000'.
Having learned nothing, (young and foolish)
we did it twice more, this time without
inverting. Recovering around 3000'
this time. The one thing I noticed was
that once stabilised there was little
change in the rate of rotation and
normal recovery actions brought
us out immediately. At no point did
it flatten in any way.
Eventually I got nervous and feigned
airsickness to convince my friend
to stop. Hardly to be recommended
but interesting for all that. It did,
however give me some confidence
in the relative docility of the 150 in a
spin. Perhaps misplaced.
As a suggestion prior to entering a spin,
perhaps a couple of stalls designed to provoke
a wing drop,should there be any
might convince you to do your
spins in another aircraft.
Having said all that I cannot recall
any incident where a Cessna 150
failed to recover from a deliberately
induced spin.
I've spun 172's too but always slightly
guilty at this abuse of a docile aircraft.
Some are very very reluctant to spin
and require firm handling.
The story of the Provost which
recovered after the departure of the
student was interesting. A very similar
thing happened to an Irish Air Corps
Vampire T55 (RAF T10). After failing
to recover from the spin. The QFI
ordered the student to eject, when he
did so the jerk of the seat caused the
Vampire to recover from the spin. The
QFI flew home with the wind in his
hair leaving the hapless student to
make his own way back.
In an odd follow up the student in his
helmet and flight gear walked to an
isolated farmhouse for help causing
the occupants to flee in terror fearing
they had been invaded by aliens!