Loening Aeronautical Engineering Company aircraft designations:
Flying Boat (1911)
First monoplane flying boat.
Loening-Milling (1912)
Single engine, land-based biplane built in the Curtiss factory for Loening.
Duckling (1918)
LS-1 (1918)
300 HP Hisso
M-2 Kitten (1918)
Submarine and ship launched aircraft
M-3 (1918)
Development of M-2 with floats.
M-8 (1918)
Fighter and racing aircraft for the US Army and Navy.
M-80 (1919)
Navy seaplane with floats
PW-2 (1920)
Loening Air Yacht (1922)
Single 400 HP Liberty 12 in pusher configuration
PW-2A (1922)
PW-2B (1922)
R-4 (1922)
Racing aircraft with 600 HP Packard 1-A.
PA-1 (1922)
Amphibian (1923)
S-1 Army Seaplane (1923)
XCOA-1 (1924)
Four prototypes powered by 400hp V-1650-1 engines, three later to COA-1
CW-1 Amphibian (1927)
C-2C Air Yacht (1928)
C-2H Air Yacht (1928)
C-4C Cabin Amphibian (1928)
C-5 (19??)
C-6 Commuter (1929)
Duckling (1929)
FL-1 (19??)
Fighter design study XFL-1 USN S/N 9346
HL (1930)
Aerial Ambulance based on C-2H.
COA-1 (1924)
Three prototypes and nine production aircraft for the Army Air Service
OA-1A (1926)
Army production aircraft with redesigned vertical tail and powered by a 420-horsepower, water-cooled Liberty V-12 engine that was mounted inverted, 15 built.
XOA-1A (1925)
One prototype with a single retractable mainwheel and skids fitted to wing floats. Powered by a inverted V-12 Wright Typhoon,[1] redesignated OA-10 before delivery in 1929.
OA-1B (1927)
Same as an OA-1A with a water-cooled V-1650-1 engine, nine built.
OA-1C (1928)
OA-1B with redesigned fin and rudder, ten built.
OA-2 (1929)
OA-1C with 480hp Wright IV-1460-1 engine modified tail surfaces and forward-firing machine gun moved to port upper wing, eight built.
XO-10 (1925)
One XOA-1A redesignated before delivery by the U.S. Army.
OL-1 (1925)
Naval version with third cockpit, two prototypes powered by a 440hp Packard 1A-1500
OL-2 (1925)
Naval version similar to the COA-1, five built.
OL-3 (1927)
OL-1 powered by a 475hp Packard 1A-1500 and other detail changes, four built.
OL-4 (1927)
OL-3 powered by a 400hp V-1650-2 engine, six built.
OL-5 (1926)
Three of these were built for the U.S. Coast Guard in 1926
OL-6 (1927)
OL-3 with a redesigned vertical tail as OA-1C, 28 built.
XOL-7 (1928)
One OL-6 fitted with experimental thicker wing.
XOL-8 (1928)
One OL-6 re-engined with 450hp Pratt & Whitney R-1340-2 engine.
OL-8 (1928)
As XOL-8 with two cockpits and a 450hp R-1340-4 engine, 20 built.
OL-8A (1929)
An OL-8 fitted with arrestor gear, 20 built.
XSL-1 (1931)
Submarine launched seaplane
XSL-2 (1931)
Re-engined submarine launched seaplane.
OL-9 (Keystone 1934)
An OL-9 with equipment changes, 26 built.
XO2L-1 (1932)
An improved version of the OL-6, prototype only.
XO-37
A development of the OA-2 with a 200hp R-1340-0 engine, project cancelled.