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wig airfoil design (Read 723 times)

Jun 30^th, 2009 at 3:59am

skyte Offline
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Hi i am in the process of trying to sort a wing foil for a ground effects machine i am working on i have made a proto using the Clark y the problem i have is that I'm not so good at working out the math side of things here are the limitations of my design it will have a max speed of around 50 kts and have a total weight of approx 110kg including the pilot it is wind powered but not in the normal way also i only want it to lift approx 700mm to 1000mm then it will be held in the water with hydrofoils .so what i need to know is what foil is best i have been looking at the liebeck l1003 (M) how big much wing area will i need to create lift at this low speed if there is anyone that is interested in pointing me in the right direction or would like to see my proto . most who have seen it have just gone WOW any help would be just awesome and hi from new Zealand the land of many inventions not to blow but my gr8 grandfather was ernest godward inventor of the modern day carburettor thanks and all replys apprecated

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Reply #1 - Jun 30^th, 2009 at 8:15am

beaky Offline
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I can't answer those questions, but welcome to the forums! Grin

I would suggest you just try an online search under "wing area formula" or something... the data you need is probably out there somewhere.

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Reply #2 - Jun 30^th, 2009 at 9:11am

MiltonShupe Offline
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skyte,

Go here for some tools and reference material.

http://pagesperso-orange.fr/hsors/index.html

And NACA airfoil numbers and reference:

http://www.ae.uiuc.edu/m-selig/ads/aircraft.html

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Reply #3 - Jun 30^th, 2009 at 5:06pm

skyte Offline
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thanks for your reply i will chek out the site

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Reply #4 - Aug 5^th, 2009 at 11:53pm

homebrewer Offline
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Hello! I'm using FS9 and
FSX-DE.
United States of Good Beer

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Excuse my ignorance, but why does a model need an accurate airfoil to function in a sim? Can't we just model what we want and by digital magic, make it work? We ain't buildin' Swiss watches, here. Can we not just write in the config files what we need to make it fly?

My system: AMD Phenom 9500 cpu, 2 x eVGA e-GeForce 8800GTS Superclocked vidcards (640Mb DDR3 each), Zalman "sunflower" 9700 fan, Gigabyte GA-M57SLI-S4 mobo, 4Gb G.Skill PC2-6400 DDR2 800Mhz RAM, 2 x Sony 20X DVD writers, Thermaltake Toughpower 850W modular p/s, 7 x 120mm fans, Windows XP Home and SP3, 2 x 250Gb Western Digital SATA-300 HDs (1 for apps, 1 for storage and precious files backup), CoolerMaster CM 690 case, NOD-32. Won't run FSX. Locks up a lot with FS9, too.

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Reply #5 - Aug 6^th, 2009 at 12:09am

MiltonShupe Offline
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Of course you can. The model can be a box, a brick or a tree.

I use them to get the shape right to satisfy the more observant among us.

You can make a Boeing 747 fly like a hang glider or a fighter like 747.

Getting the foil data can provide key information for the flight model if one is into that.

Generally you can get by with basic dimensional information and a few calculations if you are using FM tools. Jerry Beckwith's Airwrench comes to mind, or his predecessor, the Flight Dynamics Spreadsheet.

Skyte has a different kind of model to make fly and it will be a challenge with not a lot of like products out there to learn from. So, finding the appropriate modeling data is crucial as will be his knowledge of FS flight modeling.

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Reply #6 - Aug 9^th, 2009 at 2:42pm

Ivan Offline
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No, I'm NOT Russian, I
only like Russian aircraft
The netherlands

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I don't think you are getting anywhere with NACA aerofoil data...

Some stuff that might help
TSAGI aerofoil data (wind tunnel and water basin testing)
http://forums.x-plane.org/index.php?autocom=downloads&showfile=2565

Video with some nice closeups... watch the lift flaps at the end of the wings. Also shows some early designs
http://www.youtube.com/watch?v=dv2dUgbSZi8&feature=related
http://www.youtube.com/watch?v=OeUe6aVib08

Even longer video
http://rutube.ru/tracks/17662.html?v=c6c1211fd048452c141ff20385f4b4aa

Some more technical details (one of the guys in this thread was a student of Alexeyev, the inventor of the Ekranoplan)
http://www.englishrussia.com/forum/viewtopic.php?t=769&postdays=0&postorder=asc&...

Russian planes: IL-76 (all standard length ones), Tu-154 and Il-62, Tu-134 and An-24RV&&&&AI flightplans and repaints can be found here

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