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MechWarrior (Mechanical)
1 Mar 03 21:57
What airfoil should be used with ultralight aircrafts. I have searched the web but I can't find it.
JeanAlesi (Aeronautics)
30 Mar 03 14:21
Most ultralights do not have a certain trend towards specific airfoil (i.e: thickness ratio...etc). I think more attention is paid to the structural design, like seaplaneguy mentioned.
Just a last note: Gliders tend to have a pronounced historical trend towards basic wing layout, most notably the use of extreme high aspect ratio wings, which reduced induced drag, which is the dominant drag for the speed regime gliders fly in.
Piece.
gliderdesign (Aeronautics)
3 Jun 03 17:00
Have a look at the Eppler "ultralight airfoils" E377, E377, E378, and E379 at 字串1
http://www.aae.uiuc.edu/m-selig/ads/coord_database.html#E
You can plot polars, etc for each by using the JavaFoil applet available at
http://www.mh-aerotools.de/airfoils/javafoil.htm
GliderDesign
DORD2002 (Aeronautics)
7 Jul 03 12:24
This is a reply to Mechwarrior:
There is a bigger movement in the ultralight industry than most people know about. In particular, airfoil usage. Many of the early ultralight airplanes did in fact use a "rag and tube" wing with no particular airfoil. And a few still do. However, most of the newer and better designs use a specific airfoil with a "hard" wing (that is, a wing made of composites, aluminum, wood, etc). A good place to start your search for airfoils used for ultralight-type airplanes is a book by Dr. Harry Riblett titled GA Airfoils. I can point to a few very popular ultralights and experimentals that use his airfoils with great success.
字串7
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