Today's Message Index:
----------------------
1. 07:01 AM - Re: wind tunnel (Robert Haines)
2. 08:19 AM - Re: Re: wind tunnel (Gnwac@cs.com)
3. 09:34 AM - Re: Re: wind tunnel (bike.mike)
4. 12:41 PM - Re: Re: wind tunnel (Fred Weaver)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> Pietenpol-List message posted by: "Robert Haines" <robertsjunk@hotmail.com>
Max - starting on my airplane is currently in the queue, it's right behind
restoring my 1866 house (I had it lifted off the foundation and replaced the
basement last winter) and my 1930 Model-A, and this last summer we had our
second son (yea, my friends and family think I'm nuts). I've got my hands
busy after hours. This wind tunnel thing is something I can sneak in on my
lunch hour. More to the point, it's actually part of what I would consider
my pre-building "homework" to an aircraft design that I'm sure I will
modify. Until my after-work projects run their course, I'm doing OK flying
152's periodically, at least I'm flying.
Chris - So if I added little bumps and dips on the 24" scaled wing section
the test would then be valid? Otherwise, the information is meaningless?
Please reread my previous post regarding error in testing, all testing has
error. At 1/10 scale (I'm considering a wing section with a 6" cord) the
surface irregularities due to rib stitching is too small to matter. The
deformation of the skin between the ribs is a consideration, but you would
have to be a fortune teller to be able to guess what that deformation is to
any accuracy since the deformation changes under different speeds and angle
of attack. Not to mention there are those who consider adding an aluminum
or plywood wrap around the front edge to midigate this and this would then
be another set of models.
Gesh, I'm just trying to do something that would be helpful to the group.
Respectfully,
Robert Haines
Du Quoin, Illinois
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Robert,
Any help and information you can add to the Group would be helpful regarding
the FC 10. Please continue. I would like to see what you come up with in the
end.
Greg Menoche
Delaware
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> Pietenpol-List message posted by: "bike.mike" <bike.mike@verizon.net>
Robert, et al:
What is it that you expect to learn by performing a wind tunnel test?
If you want to enjoy the scientific lab work of building a model, setting up
and running a test, and analyzing results, the wind tunnel is a great
exercise that is fun in its own way.
If, however, you want to learn how the Piet wing performs, in its
full-scale, bug-smashed, real-life, application, there are thousands and
thousands of hours of actual flight, reported by the thousands of Piet
pilots of every possible skill level and scientific background who have
built and flown this little beauty in every conceivable configuration and
modification over the last 75 years. A wind tunnel test of any sort, even a
full-scale airplane in a large section tunnel at Langley in Virginia or at
Ames in California, is only going to give you an approximation of what is
learned in actual flight.
Enjoy your tunnel testing, but don't expect it to tell you anything usable
that hasn't already been learned.
Mike Hardaway
(More hours in airplanes than on tunnels, but have enjoyed both for their
own sakes.)
----- Original Message -----
From: Robert Haines <robertsjunk@hotmail.com>
Subject: Pietenpol-List: Re: wind tunnel
> --> Pietenpol-List message posted by: "Robert Haines"
<robertsjunk@hotmail.com>
>
> Max - starting on my airplane is currently in the queue, it's right behind
> restoring my 1866 house (I had it lifted off the foundation and replaced
the
> basement last winter) and my 1930 Model-A, and this last summer we had our
> second son (yea, my friends and family think I'm nuts). I've got my hands
> busy after hours. This wind tunnel thing is something I can sneak in on
my
> lunch hour. More to the point, it's actually part of what I would
consider
> my pre-building "homework" to an aircraft design that I'm sure I will
> modify. Until my after-work projects run their course, I'm doing OK
flying
> 152's periodically, at least I'm flying.
>
> Chris - So if I added little bumps and dips on the 24" scaled wing section
> the test would then be valid? Otherwise, the information is meaningless?
> Please reread my previous post regarding error in testing, all testing has
> error. At 1/10 scale (I'm considering a wing section with a 6" cord) the
> surface irregularities due to rib stitching is too small to matter. The
> deformation of the skin between the ribs is a consideration, but you would
> have to be a fortune teller to be able to guess what that deformation is
to
> any accuracy since the deformation changes under different speeds and
angle
> of attack. Not to mention there are those who consider adding an aluminum
> or plywood wrap around the front edge to midigate this and this would then
> be another set of models.
>
> Gesh, I'm just trying to do something that would be helpful to the group.
>
>
> Respectfully,
>
> Robert Haines
> Du Quoin, Illinois
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
--> Pietenpol-List message posted by: "Fred Weaver" <Mytyweav@earthlink.net>
Thanks Mike! Well said....
----- Original Message -----
From: "bike.mike" <bike.mike@verizon.net>
Subject: Re: Pietenpol-List: Re: wind tunnel
> --> Pietenpol-List message posted by: "bike.mike" <bike.mike@verizon.net>
>
> Robert, et al:
>
> What is it that you expect to learn by performing a wind tunnel test?
> If you want to enjoy the scientific lab work of building a model, setting
up
> and running a test, and analyzing results, the wind tunnel is a great
> exercise that is fun in its own way.
> If, however, you want to learn how the Piet wing performs, in its
> full-scale, bug-smashed, real-life, application, there are thousands and
> thousands of hours of actual flight, reported by the thousands of Piet
> pilots of every possible skill level and scientific background who have
> built and flown this little beauty in every conceivable configuration and
> modification over the last 75 years. A wind tunnel test of any sort, even
a
> full-scale airplane in a large section tunnel at Langley in Virginia or at
> Ames in California, is only going to give you an approximation of what is
> learned in actual flight.
> Enjoy your tunnel testing, but don't expect it to tell you anything usable
> that hasn't already been learned.
>
> Mike Hardaway
> (More hours in airplanes than on tunnels, but have enjoyed both for their
> own sakes.)
>
> ----- Original Message -----
> From: Robert Haines <robertsjunk@hotmail.com>
> To: <pietenpol-list@matronics.com>
> Sent: Wednesday, February 18, 2004 7:00 AM
> Subject: Pietenpol-List: Re: wind tunnel
>
>
> > --> Pietenpol-List message posted by: "Robert Haines"
> <robertsjunk@hotmail.com>
> >
> > Max - starting on my airplane is currently in the queue, it's right
behind
> > restoring my 1866 house (I had it lifted off the foundation and replaced
> the
> > basement last winter) and my 1930 Model-A, and this last summer we had
our
> > second son (yea, my friends and family think I'm nuts). I've got my
hands
> > busy after hours. This wind tunnel thing is something I can sneak in on
> my
> > lunch hour. More to the point, it's actually part of what I would
> consider
> > my pre-building "homework" to an aircraft design that I'm sure I will
> > modify. Until my after-work projects run their course, I'm doing OK
> flying
> > 152's periodically, at least I'm flying.
> >
> > Chris - So if I added little bumps and dips on the 24" scaled wing
section
> > the test would then be valid? Otherwise, the information is
meaningless?
> > Please reread my previous post regarding error in testing, all testing
has
> > error. At 1/10 scale (I'm considering a wing section with a 6" cord)
the
> > surface irregularities due to rib stitching is too small to matter. The
> > deformation of the skin between the ribs is a consideration, but you
would
> > have to be a fortune teller to be able to guess what that deformation is
> to
> > any accuracy since the deformation changes under different speeds and
> angle
> > of attack. Not to mention there are those who consider adding an
aluminum
> > or plywood wrap around the front edge to midigate this and this would
then
> > be another set of models.
> >
> > Gesh, I'm just trying to do something that would be helpful to the
group.
> >
> >
> > Respectfully,
> >
> > Robert Haines
> > Du Quoin, Illinois
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|