On Wed, 23 Jun 2010 23:55:58 +0200, Mxsmanic
wrote:

Hatunen writes:

Again you display your actual lack of knowledge and willingness
to display it in public. First, there is no FAR prohibiting the
demonstration or practice of doing spins.

Spins must be permitted for the aircraft, and regulations permit them (and
other aerobatic maneuvers) only under certain conditions.

Plese cite the FAR.

Of course an aircraft has to be rated for a spin. But depending
on context, what that means is than many airplanes aimply cannot
be spun with a safe recover. This is true of most military
fighter jets. In this case it would be more accurate to say that
one should not spin in an aircraft from which rcovery is
impossible.

So I'd be fascinated to read the actual wording of the FAR you
refer to.

In this case, the
Cessna 150 may be spun only after certain modifications are made (since 2009),
in part to prevent maximum rudder travel from interfering with the elevators.

Well, OK. I have spun in a 150 many years ago, but this injuction
is not rally an injuction against spinning but ratehr a rather
bad design flaw that onley appera when spinning (I presume).

Yes, I have the AD in front of me.

I have no reaosn to doubt you on this one.

However, the video was uploaded in 2007, and the aircraft has a Canadian
registration number, so this might not apply to the pilot in question.

In view of hte fact you've already said spinning in a 150 was
enjoined in 2009, it soesn't apper to me to matter whether the
spin was in the USA or Canada.

There's still the question of reckless and careless operation, but if he was
in Canada, that might not apply.

In this case it would only be reckless had the pilot been made
aware of the design flaw. Spins are not intrinsicly reckless.

In general, one must question the wisdom of a
pilot who executes aerobatic maneuvers in an aircraft not designed for that
purpose.

As I pointed out, there are aircraft designed such that they
cannot recover from a spin and it would be stupid to attempt a
spin in such an aircraft. And you note there is a specific
aircraft, the 150, that has a design flaw that can lead to
trouble in a spin (but not inevitably as my presence here is
proof of). While not necessarily stupid, it would be rather
ill-advised in a 150.

Here again, this has parallels in the world of automobiles:
executing
extreme maneuvers in an automobile not designed for such maneuvers is reckless
and careless.

Duh.

But aircraft are not designed specifically to spin (save certain
planes designed for aerobatic use). The normal structural
integrity of a plane will allow it to spin in a quite
well-behaved manner, and the warning is really about aircraft
that shouldn't be spun.

I've been too long out of the game to remember if there is a
certification plate in aircraft that says "OK for spin" or "Do
not spin".

--
************* DAVE HATUNEN ) *************
* Tucson Arizona, out where the cacti grow *
* My typos & mispellings are intentional copyright traps *