What's Piper J3-Cub's airfoil NACA number?
09-25-2013, 07:35 AM
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What's Piper J3-Cub's airfoil NACA number?
Im trying to draw piper j3 cub in Autocad. so I dont know the NACA number of piper airfoil.
does anyone know?
I want to search its number and find airfoil coordinates and draw it in autocad.
I will appreciate your help.
does anyone know?
I want to search its number and find airfoil coordinates and draw it in autocad.
I will appreciate your help.
09-25-2013, 08:34 AM
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Thought I would look up the data for you, just scrool down or use the "U" link. http://aerospace.illinois.edu/m-seli...atabase.html#U
09-25-2013, 08:34 AM
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Airfoil database:
http://aerospace.illinois.edu/m-selig/ads/coord_database.html#P
USA35-B
http://www.flyingmag.com/aircraft/pistons/piper-cub
http://aerospace.illinois.edu/m-selig/ads/coord_database.html#P
USA35-B
http://www.flyingmag.com/aircraft/pistons/piper-cub
"Taylor chose the lightly loaded USA-35B airfoil for the E-2, a design that provided good low-speed flying qualities — it was reluctant to stall and provided plenty of warning before it did. All Cubs, including the J-3 and Super Cub, have used this same airfoil shape. "
Dave
Dave
Last edited by fritzke; 09-26-2013 at 07:19 AM. Reason: Added Quotes.
09-25-2013, 08:56 AM
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thanks for your kind answers.
I drew the airfoil in autocad.
but leading edge isn't smooth. it seems it is drawn with a few lines. how can I solve this?
I drew the airfoil in autocad.
but leading edge isn't smooth. it seems it is drawn with a few lines. how can I solve this?
Last edited by Hashem; 09-25-2013 at 09:09 AM.
09-25-2013, 10:55 AM
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Your can also use the arc command "A" is an embedded short cut and using three point form several arcs And then join all the rest of the line segments useing the polyline edit "PE".
09-25-2013, 08:02 PM
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I sent you my email.
I used "pedit" command after seleting the airfoil then I selected the "spline" to smooth the curves.
but I think the curve has some issues, see the image:
the arrows shows two bad smooth curves which I think have affected the airfoil shape.
don't you think the points coordinates for drawing airfoil is few? (33 points)
Last edited by Hashem; 09-25-2013 at 08:14 PM.
09-26-2013, 08:56 AM
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compufoil have generated more points. its great. thank you Dan for your help
I have uploaded the compufoil generated airfoil for whom are interested.
