DescriptionNACA Airfoils- Variable Density Tunnel (7605917584).jpg
Description By August 1929, tests in the Variable Density Tunnel had derived the family of airfoils NACA 0006 through NACA 6721, shown here in cross-section. Published in James R. Hansen, Engineer in Charge, NASA SP- 4305, p. 98.
This image was taken from Flickr's The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as:
The copyright is in the public domain because it has expired;
The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions;
The institution owns the copyright but is not interested in exercising control; or
The institution has legal rights sufficient to authorize others to use the work without restrictions.
Please add additional copyright tags to this image if more specific information about copyright status can be determined. See Commons:Licensing for more information.
No known copyright restrictionsNo restrictionshttps://www.flickr.com/commons/usage/false