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70 years of Pitts

Posted: Mon Aug 10, 2015 10:40 pm
by Fendermandan
Just read the EAA article in their monthly mag. Interesting story on design and set of circumstances around the design. Most interesting were the parts where they were testing various wing profiles and the top wing stalls first even inverted.

I am not a big fan of biplanes, but these are a real beauties.

[img]http://www.tasmanianaeromodellingacadem ... ts%201.jpg[/img]
[img]http://barrieaircraft.com/images/pitts- ... ial-05.jpg[/img]

Re: 70 years of Pitts

Posted: Tue Aug 11, 2015 10:01 pm
by Napoleon So Low
The rubber chicken is a nice touch.  8)

Re: 70 years of Pitts

Posted: Tue Aug 11, 2015 11:27 pm
by ScudRunner-d95
[quote author=Napoleon So Low link=topic=624.msg2396#msg2396 date=1439330503]
The rubber chicken is a nice touch.  8)
[/quote]

haha too funny

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 1:55 am
by Colonel
If you ever fly a Model 12 you may
conclude (as did I) that it's more
like a junior Stearman.  It's really,
really big compared to the original
S1.  It's really big even compared
to the certified two-seats, which
the purists already consider truck-
like.

[img][/img]

In my experience, plenty of aircraft
look like a Pitts, but none of them
fly like one.  The control harmony
and response is outstanding.

They have been obsoleted by the
cantilever monoplanes, but like
many older machines, have a
subjective charm that either appeals
to you, or it doesn't.

I had the honour of meeting Curtis
a couple of times.  He liked how
we flew.

[img][/img]


Not that I have anything against
monoplanes.  I highly recommend
that everyone get a Viper L29.  Much
easier to fly than a Pitts, and oh my
God, what fun!

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 2:27 am
by duCapo
Counting down the days!

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 2:56 am
by David MacRay
That radial in the cut-away picture is reverse rotational too. Yes?

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 2:45 pm
by ScudRunner-d95
I believe you are right the Polish engines and this is not a slight at my Polish brethren rotate the "wrong" way. Actually I will look that up

[url=https://en.wikipedia.org/wiki/Vedeneyev_M14P]https://en.wikipedia.org/wiki/Vedeneyev_M14P[/url]

[quote]Unlike most Western aero-engines, which turn to the right (clockwise) when viewed from the cockpit, the M14P rotates to the left (counter-clockwise).[/quote]

So there ya go, be ready on the rudder pedals for the opposite yaw than your use to and with that thing I bet it kicks hard if your ham fisted on the throttle.

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 3:38 pm
by Colonel
[quote]reverse rotational[/quote]

Yup.  I was worried the first time I flew one,
and I shouldn't have.  Don't think, just look
outside and do what you need to do.  Reminds
me of my first helicopter lesson - in a R22.

Hovering that cunt is like trying to stuff a
banana up a monkey's ass.  And no PGI,
no pre-flight brief or anything, just jumped
in and tried to hover that bitch, closed loop.
Did ok, I guess.

We pilots are simple people.  It is best
when we try not to think - just do.



Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 3:41 pm
by David MacRay
I suspect I would initially do all sorts of over reacting fun stuff.

[list]
[li]bring the tail up too quick[/li]
[li]a little too much right rudder[/li][li]pull back a bit too quick[/li][li]a little too much left rudder[/li]
[/list]

Re: 70 years of Pitts

Posted: Wed Aug 12, 2015 3:45 pm
by Colonel
Actually, with a composite (or wooden!) blade
prop, most of that gyroscopic stuff goes away.

All you really have to worry about is the slipstream
contracting as you slow down.

[img][/img]

A short-fuselage S1 with a metal blade prop,
is going to be MUCH more of a rudder machine
than the huge model 12 with the 3-blade MT
prop, which I found to be something of gentle
old cow (hence the baby Stearman comment)
which sounded weirdly like a Russian tractor.

Blat blat blat blat blat ...

IMHO aircraft with the mixture reverse-rigged
are MUCH more dicey than simply having the
prop go the wrong way.

I gave some aerobatic instruction on a Yak-52
(after talking about it's spins to an airshow pilot
friend that flies a 'chang) and the reverse-rigged
mixture got my attention a lot more than the
"wrong" rudder pedal.

Not far from here, some very high-time pilots
crashed a $400,000 Cornell restoration, and I
was told it was the authentic reverse-rigged
mixture that got pushed forward.  You know,
cutoff.

Sometimes a little less authenticity can be a
really good idea.  A locking tailwheel is a great
example of this, too.  Flying a taildragger with
a non-locking tailwheel on dry pavement can
be very scary.  I know a guy who does it, but
he's a phenomenal stick (and a retired four-bars,
I might point out) but he was always in terrible
trouble with the union (ALPO) because he was
always flying on the side.

Sidebar:  most tailwheels are auto-locking with
a detent, and pop out when the tailwheel yaw
angle becomes too great.  A few taildraggers
have a manually-locking tailwheel (eg Pitts S1,
Beech 18, etc) but they are much less common.