Overview of de Havilland D.H.2 versions produced in the USA:
DH-4 Liberty Plane - licensed production D.H.4, Liberty engine
DH-4A - 416 litre fuel tank
DH-4B - tank moved in front of pilot, landing gear moved
DH-4B-1 - 416 l fuel tank
DH-4B-2 - training version
DH-4B-3 - 511 l fuel tank
DH-4B-4 - transport, 416 l fuel tank
XDH-4B-5 - transport, covered cabin
DH-4BD - powder-coated version
DH-4BG - B with fogging device
DH-4BK - night flight equipment
DH-4BM - single-seat connector, 416 l fuel tank
DH-4BM-1 - twin-controlled jumper
DH-4BM-2 - twin-controlled, 511 l fuel tank
XDH-4BP - experimental photo reconnaissance
XDH-4BP-1 - photographic exploratory
XDH-4BS - repowered Liberty engine
DH-4BT - dual control trainer
DH-4BW - Wright H engine
DH-4C - Packard engine
XDH-4L - civilian, narrow fuselage, 700 l fuel tank
DH-4M-1 - fuselage with arc-welded steel airframe
DH-4M-1K - towing gear
DH-4M-1T - dual control trainer
DH-4M-2 - fuselage with gas welded steel skeleton
DH-4M-2A - transport
DH-4M-2K - towing device
DH-4M-2P - photo reconnaissance
DH-4M-2S - repowered engine
DH-4M-2T - dual control trainer
DH-4Amb-1 - ambulance for 1 stretcher
DH-4Amb-2 - ambulance for 2 stretchers
DH-4Ard - for navigation training
O2B-1 - DH-4M-1 for Marines
O2B-2 - long-range equipment
XCO-7 - DH-4M-1 with new wings
XCO-7A - modified landing gear
XCO-7B - new engine
XCO-8 - DH-4M-2 with new wings
Source:
Jackson, A. J. De Havilland Aircraft since 1909, Naval Institute Press, Annapolis 1987. ISBN 0-87021-896-4
Bowers, Peter M. The American D.H.4, Aircraft in Profile No.97, Profile Publications, Leatherhead 1966
DH-4 Liberty Plane - licensed production D.H.4, Liberty engine
DH-4A - 416 litre fuel tank
DH-4B - tank moved in front of pilot, landing gear moved
DH-4B-1 - 416 l fuel tank
DH-4B-2 - training version
DH-4B-3 - 511 l fuel tank
DH-4B-4 - transport, 416 l fuel tank
XDH-4B-5 - transport, covered cabin
DH-4BD - powder-coated version
DH-4BG - B with fogging device
DH-4BK - night flight equipment
DH-4BM - single-seat connector, 416 l fuel tank
DH-4BM-1 - twin-controlled jumper
DH-4BM-2 - twin-controlled, 511 l fuel tank
XDH-4BP - experimental photo reconnaissance
XDH-4BP-1 - photographic exploratory
XDH-4BS - repowered Liberty engine
DH-4BT - dual control trainer
DH-4BW - Wright H engine
DH-4C - Packard engine
XDH-4L - civilian, narrow fuselage, 700 l fuel tank
DH-4M-1 - fuselage with arc-welded steel airframe
DH-4M-1K - towing gear
DH-4M-1T - dual control trainer
DH-4M-2 - fuselage with gas welded steel skeleton
DH-4M-2A - transport
DH-4M-2K - towing device
DH-4M-2P - photo reconnaissance
DH-4M-2S - repowered engine
DH-4M-2T - dual control trainer
DH-4Amb-1 - ambulance for 1 stretcher
DH-4Amb-2 - ambulance for 2 stretchers
DH-4Ard - for navigation training
O2B-1 - DH-4M-1 for Marines
O2B-2 - long-range equipment
XCO-7 - DH-4M-1 with new wings
XCO-7A - modified landing gear
XCO-7B - new engine
XCO-8 - DH-4M-2 with new wings
Source:
Jackson, A. J. De Havilland Aircraft since 1909, Naval Institute Press, Annapolis 1987. ISBN 0-87021-896-4
Bowers, Peter M. The American D.H.4, Aircraft in Profile No.97, Profile Publications, Leatherhead 1966