Airfoil Bartel

[Bublays]

Please,
have you got somebody coordinate profile Bartel 37IIA.
Thank you

[Ollie]

The Google search engine did not turn up any information at all on this airfoil. That probably means that it is not listed among over 2000 airfoils on Profili 2.0 program data base, the NASA data base, the NASG data base or the UIUC data base.

[davidfee]

Apparently there was a Polish aircraft in the 1930's called the RWD-5 which used this airfoil (Bartel 37 IIA). I haven't found the coordinates, but there are some drawings at the second website that show the section. Looks rather like a Clark-Y.

http://avstop.com/History/AroundTheWorld/Poland/rwd5.html

http://rwd5.republika.pl/index-a.htm


-David


http://rwd5.republika.pl/rysunki/plan-5.gif

[Sparky Paul]

From a structural drawing at the site, it appears to be a NACA 2418 type..
Chord 291, thickness 49
about 4 degrees positive incidence..
the tip has zero incidence for washout.
and is about 12% thick. The highpoint is further aft than the root, and the section is more closely symmetrical, but not fully.
Close enough for government work....

[kbosak]

Please,
have you got somebody coordinate profile Bartel 37IIA.
Thank you
Here it is.
Used in PZL-11c.
http://www.fotosik.pl/pokaz_obrazek/pelny/297c1282d8ba1022.html
I don't know if it was used in RWD-5, but it kept flying the whole series of Pulawski gull-winged aircrafts (PZL-1...PZL-11, PZL-24).
Modification of this airfoil (creating laminar profile) was used in pre-war PZL-37 Łoś ('elk') twin-engined bomber - top polish construction of the time (they have choosen to interleave designs: 5 years for fighters, 5 for bombers, so we got 91+ top-notch unprotected bombers in 1939 used for battlefield close support and armored column bombing - with heavy losses from artillery, less from fighters (the beast was fast) ).

RWD-5bis single-seated mod was under 450kg and was the lightest machine to cross the Atlantic for a long, long time (the record held since 1933 till 1986, pilot: S. Skarżyński).

[kbosak]

I haven't found the coordinates, but there are some drawings at the second website that show the section. Looks rather like a Clark-Y.

Much closer to Clark-YH if at all. Clarks have flatt bottoms, Bartel doesn't.

[kbosak]

SP-LOP is probably cool, but SP-AJU is better (was rebuilt as twin-seater after the magic flight) ;-)