I used this prog years ago and now that I need to use it again I find its not on
my system anymore.

Every link I've tried to NACA4GEN comes back with page not found error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C

Brian Cleverly wrote:
I used this prog years ago and now that I need to use it again I find
its not on my system anymore.

Every link I've tried to NACA4GEN comes back with page not found error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C

Try Profil (Profili?) - it's an Italian foil generation
program that is much more user friendly, offers DXF export
to export to your favourite CAD program, etc. Also allows
you to fine tune a foil if you're smarter than I am...

Evan Gatehouse

Try Profil (Profili?) - it's an Italian foil generation
program that is much more user friendly, offers DXF export
to export to your favourite CAD program, etc. Also allows
you to fine tune a foil if you're smarter than I am...

http://www.profili2.com/

Maybe that you mean this one...
Profili is italian for foils...

Paolo

Evan Gatehouse wrote:
Brian Cleverly wrote:

I used this prog years ago and now that I need to use it again I find
its not on my system anymore.

Every link I've tried to NACA4GEN comes back with page not found error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C


Try Profil (Profili?) - it's an Italian foil generation program that is
much more user friendly, offers DXF export to export to your favourite
CAD program, etc. Also allows you to fine tune a foil if you're smarter
than I am...

Evan Gatehouse

Thanks Evan.

I tried it and it does far more than I need.

For just profiling a rudder NACA4GEN is super easy to use (even tho it is a DOS
prog). Select profile #, enter chord and voila you have a co-ordinate list.

Thanks to the other kind sole who mentioned a link for 4GEN.

Brian C

On Sat, 02 Jul 2005 00:32:29 -0700, Brian Cleverly wrote:

Evan Gatehouse wrote:
Brian Cleverly wrote:

I used this prog years ago and now that I need to use it again I find
its not on my system anymore.

Every link I've tried to NACA4GEN comes back with page not found
error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C


Try Profil (Profili?) - it's an Italian foil generation program that is
much more user friendly, offers DXF export to export to your favourite
CAD program, etc. Also allows you to fine tune a foil if you're smarter
than I am...

Evan Gatehouse

Thanks Evan.

I tried it and it does far more than I need.

For just profiling a rudder NACA4GEN is super easy to use (even tho it
is a DOS prog). Select profile #, enter chord and voila you have a
co-ordinate list.

Thanks to the other kind sole who mentioned a link for 4GEN.

Brian C

Oh, for people who just want rudders, there is a simple equation to
generate the base NACA0020 data. Other versions are just scaled. For
example, to generate NACA0012, you would just multiply by 12/20.

Anyway, I guess I'll post the equation here for the benefit of those who
might be looking (google and all). I know it took me a long time to find
it. ;-)

y/c = 0.2969 * sqrt(x/c) - 0.1260 * x/c - 0.3516 * (x/c)^2 +
0.2843 * (x/c)^3 - 0.1015 * (x/c)^4

Variables:
c- chord
y- ordinate
x- distance along cord from leading edge

So for NACA0012, just multiply all the y values by 12/20, and for
NACA0006, multiply by 6/20, etc.

The source of this information is NASA Technical Memorandum 4741 which is
titled _Computer Program To Obtain Ordinates for NACA Airfoils_ and was
published in 1996 by NASA.

With a spreadsheet it is pretty easy to lay out any uncambered 4-digit
NACA foil you might be interested in this way.

The memorandum explains how to generate data for just about any NACA foil.

--Mac

"Brian Cleverly" wrote in message
...
I used this prog years ago and now that I need to use it again I find its
not on
my system anymore.

Every link I've tried to NACA4GEN comes back with page not found error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C


It is still available he

http://www.mfgworld.com/fileid.html

Good Luck,

Phil
247PalmBeachRE.com

On Fri, 01 Jul 2005 00:14:11 -0700, Brian Cleverly wrote:

I used this prog years ago and now that I need to use it again I find its not on
my system anymore.

Every link I've tried to NACA4GEN comes back with page not found error...

Seems Harold has moved.

Does anyone have a working link to Harold's Home Page or NACA4GEN ?

TIA,

Brian C

Xfoil can generate all the NACA foils, I believe, as well as analyze
arbitrary foils and so on. I don't know how hard it is to get running on
Windows, but it seems to work OK on my linux box.

It is also not that hard to calculate the NACA foil coordinates if you
have the documentation.

--Mac