DescriptionBell L-39.jpg	English: One of two highly modified P-63Cs made for testing low-speed and stall characteristics of transonic and supersonic wing designs. The L-39 had 35-degree swept wings. The first L-39 was later taken to NACA at Langley where it was used for wind tunnel tests.
Date	circa 1946 date QS:P,+1946-00-00T00:00:00Z/9,P1480,Q5727902
Source	Transferred from en.wikipedia to Commons by Rcbutcher using CommonsHelper. Original uploader was Binksternet at en.wikipedia 3 October 2007 (original upload date)
Author	US Government
Permission (Reusing this file)	Public domainPublic domainfalsefalse This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use. This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse

Original upload log

• 2007-10-03 15:25 Binksternet 515×263× (40633 bytes) One of two highly modified P-63Cs made for testing low-speed and stall characteristics of supersonic wing designs. The L-39 had 35-degree swept wings. The first L-39 was later taken to NACA at Langley where it was used for wind tunnel tests. It was then g