LANGLEY RESEARCH CENTER

Hampton, VA.

AD-3N	SNJ-5C	DO-31	Bell-P-39

Sikorsky R4	USN JRF	XP-42	P-40

Some of the military types undergoing drag cleanup, flying qualities and other improvement in 1943.

Piper J-2 Cub	Sikorsky S-43	P-51	Unknown

Grumman F-4F	Unknown	P-41	Unknown

Unknown	P-51