DOUGLAS TWO-LETTER DESIGNATIONS
DA-1 Ambassador parasol wing prototype ordered by Ambassador Airways; crashed on delivery
----------------------------------------------------------------------------------------------------------
DB-1 B-18
Bolo
DB-2 last aircraft in the B-18 contract modified as prototype with gun turret
DB-3 no data (perhaps applied to the B-19
"Hemisphere Bomber" ?)
DB-4 B-18A
Bolo (Source:
http://books.google.fr/books?id=Ul8hJBp-nmsC&pg=PA36);
other sources claim that the DB-4 was a projected bomber version of the first DC-4 design
DB-5 said to have been a projected bomber version of the DC-5
DB-6 no data (perhaps applied to the B-23
Dragon ?)
DB-7 A-20
Havoc and RAF
Boston (Douglas produced derivatives of the Northrop Model 7 design)
DB-8 A-17/A-33 (Douglas produced derivatives of the Northrop Model 8 design)
----------------------------------------------------------------------------------------------------------
DC-1 prototype of the DC-2/DC-3/DST family
DC-2 first production model; impressed as C-32, C-33, C-34, C-38, C-39, C-41 and R2D
DC-3 main production model; impressed as C-41A, C-48 to C-52 / procured as C-47
Skytrain,
C-53
Skytrooper C-117/A
Skytrain II/Skytrooper, and R4D
DC-4 (1) large four-engined prototype airliner with triple fins; copied as the Japanese G5N "Liz"
DC-4 (2) enlarged, more powerful derivative of the DC-3; procured as C-54
Skymaster; tests as C-114, C-115, C-116
DC-5 smaller size transport not related to other DC- designs; impressed as C-110 and R3D
DC-6 refined derivative of DC-6; impressed as C-118
Liftmaster and R6D
DC-7 (1) C-74
Globemaster transport and projected derivatives
DC-7 (2) stretched and reengined DC-6; last of the Douglas propliners; no military variant
DC-8 (1)
Skybus project, a 34-48 seat commercial transport development of the XB-42 (Model 1004)
DC-8 (2) four-jet transport; competitor of Boeing 707 and Convair 880
DC-9 (1) projected scaled-down version of the DC-8 (Model 1925)
DC-9 (2) short- and medium-range twin-engined liner family which evolved into the MD-80/82 series and Boeing 717
DC-10 large tri-engined long-range airliner which later evolved into the MD-11
----------------------------------------------------------------------------------------------------------
DF flying-boat transport sold to Russia (DF-151)
----------------------------------------------------------------------------------------------------------
DM (see separate topic on Douglas missiles)
----------------------------------------------------------------------------------------------------------
DO no details (DO-204 found); probably related to one of the Army Air Corps's O- series types
----------------------------------------------------------------------------------------------------------
DS (prefix which applied to Design Specifications)
----------------------------------------------------------------------------------------------------------
DT 6-passenger development of Northrop A-17A (DT-203); not built (not to be mistaken for Navy DT series)
DOUGLAS THREE-LETTER DESIGNATIONS
DOS Douglas Observation Seaplane (O-5);
World Cruiser converted
----------------------------------------------------------------------------------------------------------
DST Douglas Sleeper Transport; a sleeper transport version of the DC-3
----------------------------------------------------------------------------------------------------------
DWC Douglas World Cruiser; evolved from Navy DT-2 for the first successful round-the-world flight