The development of low-drag cowlings for air-cooled radial engines was one of NACA Langley's major achievements, for which it was awarded the Robert J Collier Trophy in 1929. This Curtiss XP-3A has a full-chord NACA cowling, with the front fuselage sides built out behind it to improve streamlining.

Самолёты на фотографии: Aircrafts on the photo: Curtiss F6C / P-1 / Hawk / Model 34 - СШАUSA - 1925

After completing its test programme at Wright Field, the XP-51 41-039 was used by NACA at Langley for investigations into the drag of laminar flow wings.

Самолёты на фотографии: Aircrafts on the photo: North American P-51 Mustang - СШАUSA - 1940

Favourably reviewed on this page, "Engineer in Charge" records the successive arrival at Langley Laboratory of this aircraft in March 1943: a captured Mitsubishi A6M Zero-Sen fighter for a brief evaluation

Самолёты на фотографии: Aircrafts on the photo: Mitsubishi A6M Reisen - ЯпонияJapan - 1939