Why Is NACA 64A416/4416 Mod Airfoil Data Unavailable?

[SpudB]

Hello,

I am looking for coordinates data for the airfoil NACA 64A416/4416 mod. This airfoil was used on the DeHavilland DHC-2 Beaver. While the airfoil is listed on various manufactures lists no data, or image, of the airfoil is available. Can you tell me whether there is a reason this data is not given, or am I misunderstanding something. And, is there an alternative airfoil which can be used and where the data and an image is available. The information is required for a large scale model of the DHC_2 Beaver up to 140 inch wing span.

Regards,
Spud

 

[Baluncore]

Welcome to PF.
You generate your own coordinates. The profile is specified by the designation.

Start here; http://en.wikipedia.org/wiki/NACA_airfoil
See; http://www.aeromech.usyd.edu.au/aero/sections/nacacalc.shtml

Google 'NACA generation' for online generation algorithms and code.

 

[SpudB]

Hi Baluncore,

I visited aeromech and found that by entering either 4416 (4 Series) or 64a416 (6 series) I finally get an image representation of an airfoil, plus its data. The other databases on the web don't produce either for the designations above. I don't know why but its a pity that they dont. All I need now is a method of coding the data for AutoCAD and Rhino so that the airfoil is automatically drawn. Many thanks for your help, it is very much appreciated.

Regards,
Spud

 

[Baluncore]

Google; 'autocad naca profiles'
There appear to be several available.