Aeronautical Engineering Help needed

Nat Puffer wouldnt be able to help as it is NOT with HIS design, as I
said a canard design "LIKE" the COZY. I suppose if I had said "like"
a Long-EZ you would have recomended Burt as well? hehehehe... Try
again...

Looking for modelling software, not people... Looking to do some
analysis of some designs. Something along the lines of a virtual wind
tunnel testing, stress and load testing, etc... There has to be
someone with a clue in this group somewhere. (Hoping, atleast)

Marc

"Larry Smith" wrote in message ...
"Marc A. Lefebvre US-775" wrote in message
m...
Hello,

I am looking into modifying one of the canard designs like the COZY
MkIV and wanted to know what the best way to ensure that what changes

Call Nat Puffer. He'll be tickled to help you.

On 25 Dec 2003 14:00:00 -0800, (Marc A.
Lefebvre US-775) wrote:

:Nat Puffer wouldnt be able to help as it is NOT with HIS design, as I
:said a canard design "LIKE" the COZY. I suppose if I had said "like"
:a Long-EZ you would have recomended Burt as well? hehehehe... Try
:again...
:
:Looking for modelling software, not people... Looking to do some
:analysis of some designs. Something along the lines of a virtual wind
:tunnel testing, stress and load testing, etc... There has to be
:someone with a clue in this group somewhere. (Hoping, atleast)
:
There's isn't any consumer level modeling software that can do an
adequate job on a canard configuration. You need a vortex lattice
package, there are a lot of interactions between the canard and main
wing that are subtle and complex. There are a number of packages
around, most are written in Fortran, you need to get the source code
and compile for whatever your configuration is. Do a search on VLMD,
it's been used for canards and tandem wings.

wrote:

Looking for modelling software, not people... Looking to do some
analysis of some designs. Something along the lines of a virtual wind
tunnel testing, stress and load testing, etc... There has to be
someone with a clue in this group somewhere. (Hoping, atleast)

Wingco used the X-plane simulator to help with their new design.

http://www.wingco.com

http://www.x-plane.com

Profili and xfoil are serious tools for airfoil analysis. Profili is
an inexpensive front end for xfoil. xfoil recently became freeware.

http://www.profili2.com/eng/default.htm

http://groups.yahoo.com/group/xfoil/

There are many other firms offering software packages for aircraft
design. Spend some time learning about structuring Google queries and
you will find them. Seriously.

http://www.google.com/help/

Aircraft design is dead serious. The more you know the more dangerous
you become - you can die or cause others to die.

I do not mean to discourage you. However, ... beware.

Only airtime proves airframes.

Fly right.

nc

Hi Marc,
I frequently get questions from folks who want to make changes
to my design. It's human nature to want to build "a better mouse trap".
There are several available chart type plots of general aerodynamic
formulas boiled down into graphic comparisons of areas, forces, speeds,
weights,.........etc. (I.E. McCoy's, or Beaujon's aerodynamic
tablature)
You won't get any solid usable advice (none you want to hear) from
a design holder or probably many builders either.
Do the aerodynamic calculations and intentionally over build
strength-wise. You're almost on your own. .....Guess that's why we're
"Experimental" aviators.
......Good luck!

(Marvin Barnard) wrote in message ...
I frequently get questions from folks who want to make changes
to my design. It's human nature to want to build "a better mouse trap".
There are several available chart type plots of general aerodynamic
formulas boiled down into graphic comparisons of areas, forces, speeds,
weights,.........etc. (I.E. McCoy's, or Beaujon's aerodynamic
tablature)

Thanks for your response to my inquiry. Can you point me to a good
source for these tabs online? Also, are there any software packages
out there that can help with the task?

Marc

On 26 Dec 2003 18:49:54 -0800, (Nicholas Cafarelli)
wrote:

wrote:
:
: Looking for modelling software, not people... Looking to do some
: analysis of some designs. Something along the lines of a virtual wind
: tunnel testing, stress and load testing, etc... There has to be
: someone with a clue in this group somewhere. (Hoping, atleast)
:
:Wingco used the X-plane simulator to help with their new design.

And look where it got them.

X-plane is fine to start with, but it's not a good predictor of flight
characteristics, particularly with anything but a completely
conventional configuration.

For loading, if you're going composite, it's going to be very hard to
model. For aluminum, Catia is great, but insanely expensive.

(you can look at www.warezstore.com, but I didn't tell you that.)

As an aeronautical engineer, I'll give you some free advice regarding
modifying a canard configured aircraft: don't

As another aeronautical engineer I strongly agree (and second) this opinion.
BTW if you want long range a canard is not for you.


"David Lednicer" wrote in message
...
As an aeronautical engineer, I'll give you some free advice regarding
modifying a canard configured aircraft: don't

"Dan Apel" wrote:

BTW if you want long range a canard is not for you.

Your assertion rings false in both theory and practice. There is
nothing inherently range-limiting about a canard design. Of the
popular canard homebuilt designs, most rank quite well in cruise
range. A stock Long EZ, for example, will fly 1000 miles full
throttle at altitude (75% power) and land with VFR reserves in the
tanks. The Class C-1a and C-1b world records for range are held by
canard aircraft.

David O -- http://www.AirplaneZone.com

I thought the round the world non-stop Voyager was a canard... Guess I am
wrong! GRIN

--
Cy Galley
Editor, EAA Safety Programs
or




"David O" wrote in message
...

"Dan Apel" wrote:

BTW if you want long range a canard is not for you.

Your assertion rings false in both theory and practice. There is
nothing inherently range-limiting about a canard design. Of the
popular canard homebuilt designs, most rank quite well in cruise
range. A stock Long EZ, for example, will fly 1000 miles full
throttle at altitude (75% power) and land with VFR reserves in the
tanks. The Class C-1a and C-1b world records for range are held by
canard aircraft.

David O -- http://www.AirplaneZone.com