nafod40 wrote in message ...
drake wrote:
Hi,

there is a HAL HPT-32 (pistonengined 2 seater trainer light a/c)
which, when attempting a stall, does not pitch down correctly. Instead
one of the wings (either port or starboard (50/50)... no gyro problems
due to engine) almost always drops, and this genreally results in the
a/c entering a spin (which the rookie pilots are unable to handle,
generally).

Sounds like a great trainer aircraft! If this problem common to the
type, or just this particular A/C?

The 50/50 part is interesting. Normally, if a plane is bent, it'll favor
one side or 'tuther.

Stall strips are a common way to improve stall performance, so as to
keep the tips flying (and ailerons working) while the root stalls. Does
the type have them?

Good luck...

Some airplanes might have some nasty stall characteristics
caused by wing design, and sometimes such design is intentional to get
good aerobatic performance and to teach advanced flight maneuvers.
Most training airplanes are designed to have straightforward stalling
behaviour, some so forgiving that there is no real stall at all.
Newbie pilot students can get into big trouble real quick with stall
behaviour that drops one wing or the other.
Any certified airplane will have a straight-ahead stall break.
Wing drop is caused by one wing stalling slighty earlier, or the stall
on that side has progressed more than on the other, and if the wing
isn't out of rig, it's caused by uncoordinated flight. The nose of the
airplane isn't pointing straight ahead so that the airplane is sliding
slightly sideways as it stalls, and the wingtip that's farther aft
will stall first and drop. The same holds true for skidding turns; the
inside wing will drop first.
A power-on stall will most often drop the wing on the side that
has the upgoing prop blade; in North America, that's the left wing.
The rotating propwash strikes the wing root and causes a higher angle
of attack on that side, causing an earlier stall.

Dan