LiTOT: Douglas index
A corporate history timeline compiled from the Eaton Chronicle of the Aviation Industry in America outlines Donald Douglas' participation in the American aviation industry and that of his eponymous company.
With the SBD, the A-20/DB-7 (and, later, the A-26), the military versions of the DC-3, the C-54 and the license built B-17s and B-24s, Douglas was a major player in the US air effort in WWII. They also built the giant XB-19 technology development platform and designed a number of advanced planes that didn't make it to operational status. They produced nearly 30,000 planes during the war years. Importantly, Douglas was part of the B-V-D Boeing - Vega - Douglas) consortium producing B-17F and B-17G planes.
- A-20 Havoc, DB-7 Boston two-engined attack bomber
- A-26 Invader two-engined attack bomber
- A-33 single-engined light attack bomber
upgraded Northrop A-17, manufactured by Douglas as the 8A-5
- B-18 Bolo two-engined medium bomber
derived from DC-2 airliner airframe
- XB-19 Hemisphere Defender four-engined heavy bomber
technology development experimental plane
- XB-22 experimental improved B-18
- B-23 Dragon two-engined medium bomber
- XB-42, XA-42 Mixmaster two-engined attack bomber
- BTD Destroyer single-seat, single-engined dive/torpedo bomber
- XCG-17 experimental cargo glider; glider conversion of C-47
- C-32, R2D two-engined transport; conscripted DC-2
- C-33 two-engined transport; DC-2 variant
- C-34 two-engined transport; DC-2 variant
- C-38 two-engined transport; DC-2 variant
- C-39 two-engined transport; DC-2 variant
- C-41 two-engined transport; DC-2 variant
- C-41A two-engined transport; DC-3 variant
- C-42 two-engined transport; DC-2 variant
- C-47 Skytrain, R4D, Dakota two-engined transport; DC-3 variant
- C-48 two-engined transport; conscripted DC-3
- C-49 two-engined transport; conscripted DC-3
- C-50 two-engined transport; conscripted DC-3
- C-51 two-engined transport; conscripted DC-3 variant
- C-52 two-engined transport; conscripted DC-3
- C-53 Skytrooper two-engined transport; paratroop version of C-47
- C-54, R5D Skymaster four-engined transport; military version of DC-4
- C-58 two-engined transport; transport version of B-18
- C-67, UC-67 two-engined transport; transport version of B-23
- C-68 two-engined transport; conscripted DC-3
- C-74 Globemaster four-engined transport; predecessor to DC-7
- C-84 two-engined transport; conscripted DC-3
- C-110, R3D two-engined transport; conscripted DC-5
- XC-112 four-engined transport; predecessor to DC-6
- XC-114 four-engined transport; re-engined C-54
- YC-116 four-engined transport; re-engined C-54
- C-117 Skytrooper two-engined transport; upgraded C-47
- O-46 single-engined high-wing observation
- P-70 Midnite Mauler two-engined night fighter conversion of A-20, aka Havoc, Nighthawk
- SBD Dauntless, A-24 Banshee two-place single-engined scout/dive bomber
- TBD Devastator three-place single-engined torpedo bomber
- Our Airlines A Bulwark of Defense (DC-3) [ drawing ]
- Our second line of air defense pays its way (DC-3) [ drawing ]
- In Peace or War nothing can replace our airlines (DC-3) [ drawing ]
- Douglas Defends Democracies (XB-19, A-20) [ drawing ]
- Fastest, Fightin'est Plane the Havoc (A-20) [ drawing ]
- Douglas Dauntless the world's hardest hitting dive bomber, in US Navy service (SBD, plus Douglas line) [ photo ]
- No 1 on the Hit Parade (whole line) [ drawing ]
- "Mass Producing the A-20 Bombers" [ HTML ] describes production of the DB-7/A-20 attack bomber.
- "Fortresses by Douglas" [ HTML ] , [ PDF, 14.9 MiB ] describes the organization and process Douglas used in constructing B-17s as part of the B - V - D consortium.
- "Fingers of Speech" [ HTML ] ,
[ PDF, 8.6 MiB ], from the Douglas Army Service School, describes hand signals used on flight lines and other areas where noise levels are too high for voice.
ie, types without a Design Analysis article
- A26 Invader
- A News clip with photo, "First photo of Invader," shows an A-26 on hardstand, seen from 11 o'clock.
Captioned: Described by War Department as newest and fastest all-purpose bomber, this is Douglas A-26 Invader, specifically designed for either low- or medium-altitude operations against enemy ground and naval forces and installations. Combined in craft are heavy firepower and bomb capacity plus great speed. Power is supplied by twin Pratt & Whitney 2,000-hp R-2800 Double Wasp engines. NACA low-drag (laminar flow) airfoil section is employed, and double-slotted flap is a feature. Design for maintenance simplification stresses accessibility to parts, and nose takes special-mission equipment on production line, thus saving trip to modification center.
- The color front cover of Aviation for December, 1944, is a Hamilton Standard ad, "Hydromatics on the A-26," features a color painting of A-26s on a low-level bombing run. Foreground plane is seen from 12 o'clock low.
- A News clip with photo shows "A-26B-10-DL 139136 in flight, seen from 2 o'clock.
Captioned: New version of Douglas A-20 Havoc, the A-26 Invader is powered by two Pratt & Whitney Double Wasp engines (2000-hp), has three-bladed Hamilton Standard Hydromatic propellers 12'7" in diameter.
- A Chandler-Evans Corp (Ceco carburetors) ad, "Sextuple Threat," shows an A-26 in flight, seen from 4 o'clock low.
- "Douglas A-26 Invader Proves "Hottest" Attack Bomber"[ HTML ] describes the A-26 in some detail and includes a first-person report of a training mission. The article includes 3 photos:
- Close-up flight shot of Douglas A-26 Invader, newest AAF attack bomber which makes bombing runs above 300 mph. For attack work, armament may be quickly varied between 50-cal machine guns and 20-, 37-, or 75-mm cannon. Clearly shown are remote control twin-50 gun turrets similar to those installed on Boeing B-29. [ photo ]
Plane is A-26B-35-DL 139459, seen from 3 o'clock high.
- Despite high speeds made possible by laminar-flow wing and ofter aerodynamic characteristics, landing speed is kept moderate by new-type Douglas flaps which give added lift and drag. Large flap deflection is shown here on craft landing at Florence (SC) Army Air Field, where crews receive final training. [ photo ]
- Roger One (center) piloted by Capt Douglas Dean, with Aviation correspondent aboard as observer, starts turn during high-speed bombing training mission typical of those employed by First Air Force's 56th Combat Crew Training Wing. A-26 bomb loads range up to three tons, with types ranging from incendiaries to 1,000-pounders. [ photo ]
From tail numbers, these appear to be Douglas A-26B-20-DL Invaders.
Interestingly, the planes shown have the gun nose rather than the bombardier's glass nose.
- "Landing Flaps for A-26 Invader" [ HTML ] describes development of the Douglas double-slotted flap and includes
- An Altair (Pacific Division of Bendix Aviation Corp hydraulic controls) ad, "8 Altair hydraulic controls on the Douglas Invader," shows an A-26 in flight, seen from 2 o'clock.
- "Double-Slotted Flaps On A-26 Give High-Efficiency Performance" [ HTML ] describes development of the Douglas double-slotted flap and includes
- Graphic representation of test results depicting airflow over various types of flaps set at 52°. Note complete separation over plain flap, partial separation over conventional slotted flap, and reduced separation with Douglas double-slotted flap. [ drawing ]
- In retracted position of flap, linkage is completely contained within the wing contour, providing aerodynamic cleanliness. [ photo ]
- Double-slotted flap in extended position. Vane is at top and moves with respect to flap so as to maintain optimum position for all degrees of flap travel. [ photo ]
- This underwing shot of Douglas A-26 Invader shows bottomside of vane and its relative position between wing trailing edge and flap proper. Note fairing for linkage when flap is retracted [ photo ]
Photo shows A-26B-5-DL 139108 left-wing flap, aft of nacelle, empennage
- A Barber-Colman Co (fhp electric motor controls) ad, "Barber-Colman controls on carburetor heat and filters for the A-26 Invader," shows A-26B-10-DL 139136 in flight, seen from 2 o'clock.
- An Alcoa ad, "7Gs plus 75ST = safe pullouts," shows an A-26 from directly above the right wing.
- A News Clip with photo, "Grace of a gull
," shows a Douglas 8A-5 in flight, seen from 10 o'clock low
- Douglas A-33, conscripted 8A-3 export version of the Northrop A-17 Nomad, used as a trainer and utility plane.
- B-18 Bolo
- A Bendix Products Division (landing gear components) ad, "'Easy' is the word with bombers too!," shows some 15 B-18s parked close on hardstand. Foreground plane is seen from 9 o'clock high. Planes have "meatball" insignia, striped rudders.
- A detail photo from a Rohm & Hass (Plexiglas) ad shows the greenhouse nose of a B-18, seen from below left.
- A White-Rodgers Electric Co (electric fhp motor controls) ad, "Make them more and more automatic," shows a flight of 5 B-18As flying in echelon right. View is from 10 o'clock low. Planes have "meatball" insignia, striped rudders.
- A Saginaw Products Corp ad, "Bombs Handle with Care," shows a B-18 on grass being bombed up. Plane is seen from 1 o'clock close.
- B-23 Dragon
- A color Gallery photo, Douglas B-23 shows a Dragon in flight, tail number 94/MD, seen from 10 o'clock.
- O-46 observation
- A color Gallery photo, Douglas O-46 shows an O-46, tail number 63/WD, in flight, seen from 1 o'clock low.
- TBD Devastator