Table III—
Continued
Manufacturer’s Designation
Letter Manufacturer Period
R Interstate Aircraft and Engineering Corp. 1942–1962
R Radioplanes Co. 1948–1962
R Ryan Aeronautical Co. 1948–1962
S Schweizer Aircraft Corp. 1941–0000
S Sikorsky Aviation Corp. 1928–1962
S Sperry Gyroscope Co. 1948–1962
S Stearman Aircraft Co. 1934–1945
T Taylorcraft Aviation Corp. 1942–1946
T Tempco Aircraft Corp. 1955–1962
T New Standard Aircraft Corp. 1930–1934
T The Northrop Corp. 1933–1937
T Northrop Aircraft Inc. 1944–1962
T Timm Aircraft Corp. 1941–1943
U Lewis & Vought,Chance Vought, 1922–1962
Vought Sikorsky
V Vultee Aircraft Inc. 1943–1945
V Lockheed Aircraft Corp. 1942–1962
W Canadian Car and Foundry Co., Ltd. 1942–1945
W Waco Aircraft Corp. 1934–1945
W Willys-Overland Co. 1948–1962
W Wright Aeronautical Corp. 1922–1926
X Cox-Klemin Aircraft Corp. 1922–1924
Y Consolidated Aircraft Corp. 1926–1954
Y Convair Division (General Dynamics Corp) 1954–1962
Z Pennsylvania Aircraft Syndicate 1933–1934
A basic company name has been used in some of the above enteries even
though the company may have undergone restructuring.
Table III—
Continued
Manufacturer’s Designation
Letter Manufacturer Period
H Stearman-Hammond Aircraft Corp. 1937–1939
J Berliner/Joyce Aircraft Co. 1929–1935
J North American Aviation 1937–1962
K Fairchild Aircraft Corp. 1937–1942
K Kaman Aircraft Corp 1950–1962
K Kaiser Cargo Inc.Fleetwings Div. 1948–1962
K Keystone 1927–1930
K Kinner Airplane & Motor Corp. 1935–1936
L Bell Aircraft Corp. 1939–1962
L Columbia 1944–1946
L Grover Loening, Inc. 1923–1933
L Loening Aeronautical Engineering Corp. 1922–1932
M General Motors Corp.(Eastern Aircraft Div.) 1942–1945
M Glenn L.Martin Co. 1922–1962
N Gyrodyne Company of America 1955–1962
N Naval Aircraft Factory 1922–1948
N Naval Air Development Station 1948–1962
O Lockheed Aircraft Corp. 1931–1962
P Pitcairn Autogyro Co. 1931–1932
P Piasecki Helicopter Corp. 1946–1955
P Vertol Aircraft Corp. 1955–1962
P Spartin Aircraft Co. 1940–1941
Q Bristol Aeronautical Corp. 1941–1943
Q Fairchild Engine and Airplane Co. 1928–1962
Q Stinson Aircraft Corp. 1934–1936
R Aeronca Aircraft Corp. 1942–1946
R Ford Motor Co. 1927–1932
UNITED STATES NAVAL AVIATION 1910–1995 471