CO - Corps Observation Aircraft

Model Designation Manufacturer Engine(s) Crew Other
CO-1
Engineering Division 1 Liberty 12 2
CO-2
Engineering Division 1 Liberty 12 2
CO-3
Engineering Division 1 Liberty 12 2 cancelled
XCO-4
Fokker-Atlantic 1 Liberty 12A 2
CO-4A
Fokker-Atlantic 1 Liberty 12A 2
XCO-5
Fokker-Atlantic 1 Liberty 12 2 TP-1
XCO-6
Engineering Division 1 Liberty V-1410 2
XCO-6B
Engineering Division 1 Liberty 12A 2
XCO-6C
Engineering Division 1 Liberty 12A 2
XCO-7
Boeing 1 Liberty 2
XCO-7A
Boeing 1 Liberty 2
XCO-7B
Boeing 1 Liberty 12A 2
XCO-8
Fokker-Atlantic 1 Liberty 2