Loening
Aircraft Locator
Designation
Nickname
Primary role
COA-1
 
U.S. Air Force Corps Observation, Amphibian (1919-1924)
HL
 
U.S. Navy / Marines Hospital (Ambulance) (1929-1942)
LS
 
U.S. Navy / Marines Scout (1922-1946)
M-3
Cat 
Various US Military Undesignated Aircraft (1909-1919)
M-8
 
Various US Military Undesignated Aircraft (1909-1919)
O-1
 
U.S. Air Force Observation (1924-1942)
O2L
 
U.S. Navy / Marines Observation (1922-1962)
OA-1
 
U.S. Air Force Observation, Amphibian (1925-1947)
OA-2
 
U.S. Air Force Observation, Amphibian (1925-1947)
OL
 
U.S. Navy / Marines Observation (1922-1962)
PW-2
 
U.S. Air Force Pursuit, Watercooled (1919-1924)
PW-2
 
U.S. Air Force Pursuit, Watercooled (1919-1924)
R-4
 
U.S. Air Force Racer (1919-1924)
S2L
 
U.S. Navy / Marines Scout (1922-1946)
SL
 
U.S. Navy / Marines Scout (1922-1946)