Wing Stall

"Ray Andraka" wrote in message ...
I had a set of video magazines from sometime in the 80's that had a clip of
someone famous doing exactly that, except he used pieces of yarn and had several
dozen on the wing. I don't think I have the videos any more. It was a video
magazine for pilots that only lasted 2 or 3 issues. Wish I could remember the
name of the mag. The speaker on that segment might have been Barry Schiff. The
same series had Chuck Yeager's time to climb attempt in a conquest, and had a
segment on that gulfstream outfitted with cameras for filming aircraft in
flight.

Kerschner for sure spent some time tufting his plane. He also added little trailing
cones and some interior pendulums to work out the dynamics during spins. He
has a rather humerous talk on his escapades with this (both the results of the tests
and comments between him and ATC when he flew the tufted plane into a controlled
field).

I had a set of video magazines from sometime in the 80's that had a clip of
someone famous doing exactly that, except he used pieces of yarn and had several
dozen on the wing. I don't think I have the videos any more. It was a video
magazine for pilots that only lasted 2 or 3 issues. Wish I could remember the
name of the mag. The speaker on that segment might have been Barry Schiff. The
same series had Chuck Yeager's time to climb attempt in a conquest, and had a
segment on that gulfstream outfitted with cameras for filming aircraft in
flight.

ShawnD2112 wrote:

Chuck,
You didn't happen to video it, did you? I've been looking for exactly that
kind of footage for my ground school class to show exactly what you've
talked about.

Shawn
"PaulaJay1" wrote in message
...

I did an interesting experiment in my Archer yesterday. I've read about
the
wing washout and know the soft stall of my Archer but yeaterday I saw it.
Using small pieces of duct tape, I put eight, six inch ribbons on the left
wing
- four along the leading edge, back about 10 inches, and four, 10 inches
forward of the trailing edge.

At 3,000 AGL, I slowly decreased speed while holding altitude. For the
longest
time they all streamed. Then the most inboard aft "came loose". Just
before
the break for the stall, all four close in ribbons were stalling and the
four
out ribbons were still streaming. The Archer stall is mild and is a
series of
scollops. The outside ribbons, in the area of the ailerons kept
streaming.

I saw what makes this a forgiving plane and a good choice for the
occasional
pilot.

Chuck

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930 Fax 401/884-7950
email
http://www.andraka.com

"They that give up essential liberty to obtain a little
temporary safety deserve neither liberty nor safety."
-Benjamin Franklin, 1759

Probably copyrighted, though.


There's the rub. Thanks for the tip, though.

Shawn
"Dave Butler" wrote in message
...
Various of the King Schools knowledge exam prep multimedia materials have
some
footage like that. Probably copyrighted, though.

Dave
Remove SHIRT to reply directly.

ShawnD2112 wrote:
Chuck,
You didn't happen to video it, did you? I've been looking for exactly
that
kind of footage for my ground school class to show exactly what you've
talked about.

Shawn
"PaulaJay1" wrote in message
...

I did an interesting experiment in my Archer yesterday. I've read about

the

wing washout and know the soft stall of my Archer but yeaterday I saw
it.
Using small pieces of duct tape, I put eight, six inch ribbons on the
left

wing

- four along the leading edge, back about 10 inches, and four, 10 inches
forward of the trailing edge.

At 3,000 AGL, I slowly decreased speed while holding altitude. For the

longest

time they all streamed. Then the most inboard aft "came loose". Just

before

the break for the stall, all four close in ribbons were stalling and the

four

out ribbons were still streaming. The Archer stall is mild and is a

series of

scollops. The outside ribbons, in the area of the ailerons kept

streaming.

I saw what makes this a forgiving plane and a good choice for the

occasional

pilot.

Chuck





--
Dave Butler, software engineer 919-392-4367
A fool and his money are soon flying more airplane than he can handle.

I have a video of just that done with a Cherokee by someone at the
factory. It also includes an interview of the Cherokee original
engineer. Now what was his name?????......

ShawnD2112 wrote:
Chuck,
You didn't happen to video it, did you? I've been looking for exactly that
kind of footage for my ground school class to show exactly what you've
talked about.

Shawn
"PaulaJay1" wrote in message
...

I did an interesting experiment in my Archer yesterday. I've read about

the

wing washout and know the soft stall of my Archer but yeaterday I saw it.
Using small pieces of duct tape, I put eight, six inch ribbons on the left

wing

- four along the leading edge, back about 10 inches, and four, 10 inches
forward of the trailing edge.

At 3,000 AGL, I slowly decreased speed while holding altitude. For the

longest

time they all streamed. Then the most inboard aft "came loose". Just

before

the break for the stall, all four close in ribbons were stalling and the

four

out ribbons were still streaming. The Archer stall is mild and is a

series of

scollops. The outside ribbons, in the area of the ailerons kept

streaming.

I saw what makes this a forgiving plane and a good choice for the

occasional

pilot.

Chuck

PaulaJay1 wrote:
In article eZ5Bb.272612$Dw6.930509@attbi_s02, Kevin writes:


Cool test Chuck! I assume the ribbons were straight back in normal

flight? What did they do during the stall? Sideways, upwards,
forwards, random?

-Nathan


It would get even better if you add some vortex generators .


Straight back and no flutter during normal flight.
Ribbons lifted off the wing and did random lazy circles in stall.

What does "even better" mean? I liked what I saw. Vortex generators (don't
think they are STCed for the Archer) would make the flow stick longer and the
wing break more sudden, wouldn't it.

Chuck

VG details, look at the steep climbout of the cherokee .

/www.pipermods.com/SEATBELT.html

In article , "ShawnD2112"
writes:

Chuck,
You didn't happen to video it, did you? I've been looking for exactly that
kind of footage for my ground school class to show exactly what you've
talked about.

Shawn

Sorry Shawn, I didn't but it sure would be easy to duplicate yourself. I used
8 ribbons - 4 along the lead edge and 4 aft. Actually 6 inch pieces of yarn
and a bit of duct tape at the front. Eight or ten ribbons are plenty to show
the progressing stall. Pretty obvious to see the effect as you approach stall.

Chuck

Cheers, Chuck. I may do that (one of these days, when I get around to it,
etc, etc, etc)

Shawn :-)
"PaulaJay1" wrote in message
...
In article , "ShawnD2112"
writes:

Chuck,
You didn't happen to video it, did you? I've been looking for exactly
that
kind of footage for my ground school class to show exactly what you've
talked about.

Shawn

Sorry Shawn, I didn't but it sure would be easy to duplicate yourself. I
used
8 ribbons - 4 along the lead edge and 4 aft. Actually 6 inch pieces of
yarn
and a bit of duct tape at the front. Eight or ten ribbons are plenty to
show
the progressing stall. Pretty obvious to see the effect as you approach
stall.

Chuck

On Tue, 09 Dec 2003 03:49:40 GMT, Michelle P
wrote:

Chuck,
You were conducting the this "experiment" in a Experimental Certified
aircraft right? ;-) Otherwise you violated the type certificate of the
aircraft.
I hope you were alone and the FAA was not watching.

It's OK if he was not carrying passengers.


Michelle

PaulaJay1 wrote:

I did an interesting experiment in my Archer yesterday. I've read about the
wing washout and know the soft stall of my Archer but yeaterday I saw it.
Using small pieces of duct tape, I put eight, six inch ribbons on the left wing
- four along the leading edge, back about 10 inches, and four, 10 inches
forward of the trailing edge.

At 3,000 AGL, I slowly decreased speed while holding altitude. For the longest
time they all streamed. Then the most inboard aft "came loose". Just before
the break for the stall, all four close in ribbons were stalling and the four
out ribbons were still streaming. The Archer stall is mild and is a series of
scollops. The outside ribbons, in the area of the ailerons kept streaming.

I saw what makes this a forgiving plane and a good choice for the occasional
pilot.

Chuck

"Bill J" wrote in message
...
I have a video of just that done with a Cherokee by someone at the
factory. It also includes an interview of the Cherokee original
engineer. Now what was his name?????......

"Papa Alpha" or something like that, wasn't it?

--
Jim Fisher