The Douglas A-20 Havoc, derived from their DB-7 design, also flew as the Boston. Some were reequipped and redesignated P-70, for use as an interim night fighter while the P-61 was being developed. The US nickname was always Havoc; most sources agree that that name came from the British, who applied it to the night intruder and the nightfighter versions. An alternate version is that when they took off the glass nose and put on the gun nose the Boston became the Havoc, as in "Cry 'Havoc!', and let slip the dogs of war." The gun-nosed version would certainly seem to fit the "dogs of war" description.
A preliminary draft version of the Aviation Design Analysis article [ PDF, 11.5 MiB ], recovered from microfilm, is included. An HTML version, with illustrations recovered from the magazine [ HTML ], is also provided.
The design analysis from Air Tech [ HTML ] is also included.
Combat experience and the availability of improved engines led to the development of the A-26 Invader.
- "Bostons For Britain"[ HTML ] is a short, illustrated introductory article to the DB-7.
- "Mass Producing the A-20 Bombers"[ HTML ] describes the production line setup at Douglas for producing the plane.
- "American Aircraft in the RAF" [ HTML ] describes pilot reactions to the Boston and Havoc.
- "The Douglas Havoc A-20" [ HTML ] describes the gun-nosed A-20G and the glass-nosed A-20J. It also lists nicknames for the P-70 as Midnite Mauler and Nighthawk.
- "Hit and run" [ HTML ] goes into Marauder strikes and joint Havoc-Marauder raids out of England.
Drawings and diagrams
- "Aviation's Sketchbook of Design Detail" drawings:
- A Douglas ad, "Fastest, fightin'est plane the Havoc," features a painting of A-20s attacking a port. An A-20 is seen from 7 o'clock through the bombardier's window of another.
- The Air Tech Design Analysis article [ HTML ] includes 11 drawings and diagrams:
- The Aviation Design Analysis article [ HTML ] includes 18 drawings and diagrams:
- A news clip with photo shows a Boston on the tarmac seen in RAF livery from 3 o'clock.
- A news clip with photo shows a shows an A-20A on tarmac, seen from 2 o'clock. Finish is natural metal, with "meatball" insignia and striped rudder.
- The "Have You Seen?" section for January, 1941, shows an early picture of an A-20 USAAC version of the DB-7.
- "Bostons For Britain" [ HTML ] includes an in-flight photo of a Boston in RAF paint scheme, seen from 2 o'clock.
- A news clip with photo, "Self-Sealing Gas Tanks," shows workers installing self-sealing fuel tanks into inner wing subassemblies.
- "War in the Air" [ HTML ] has a photo of a Boston III on the ground in Libya, seen from 7 o'clock
- The "Have You Seen?" section for July, 1942, shows a flight of Bostons in RAF colors, seen from 10 o'clock.
- "Report from the British Airfront" includes a photo of a Boston in flight, seen from 10 o'clock high.
- "Bomber Command" [ HTML ] includes a photo: "The Douglas Boston has been effectively used by the RAF as the spearhead of its daylight attacks in Northern France."
- "Destination: Dieppe" shows the nose of an A-20 with added armament.
- A "Bulletin Board" photo shows four armorers with British-style bombs in front of a SAAF DB-7B Havoc III.
- A Fafnir Ball Bearings ad, "Off to Bostonize the enemy!," shows 4 glass-nose A-20s in formation, near plane seen from approximately 3 o'clock. Planes have star-in-circle insignia. These planes show the tunnel-gun ventral defensive position.
- A Roller Bearing Co of America ad, "RBC Aircraft Series #5 Douglas Boston," shows a glass-nose DB-7 in RAF livery, seen from 2 o'clock high.
- A color Gallery photo, "Current AAF night fighter is four-cannon Douglas P-70," shows a P-70 from 2 o'clock high. Paint scheme seems to be matte black.
- A color Gallery photo, "One of the best-liked AAF combat types is the Douglas Havoc (A-20)," shows the left side of the nose of a glass-nose A-20 in OD over light grey camo. Plane is on the ground, seen from 11 o'clock close. Plane has packet guns mounted next to the nose .50s; packet gun shown is probably a .50-cal.
- A color Gallery photo, "Ole' Man Mose," shows A-20A 0101 Ole' Man Mose on a dirt field. Plane has modified glass nose with an extra .50-cal, access panel open for installing packet gun. Camo paint is quite faded. View is of lefthand engine and left side of nose.
- "War in the Air" [ HTML ] (Flying, October, 1943) includes a photo of a P-70 with attack nose instead of ventral tray. Plane is seen fromo 9 o'clock, slightly above the wing.
Caption reads: "Typical of the ever-increasing strength of air power is the Douglas P-70 night fighter with four 20-mm cannon."
- The Aviation Design Analysis article [ HTML ] includes 18 photos:
- A H A Wilson Co (specialty metals) ad, "Flexible in range
Rigid in quality," shows a line of glass-nose Bostons on a grass field. Photo shows the righthand engine and nose of each of 5 planes.
- A news clip with photo, "Black as the Enemy's Heart," shows 2 P-70s in right profile.
These planes were probably flying out of Guadalcanal.
- "The Douglas Havoc A-20" [ HTML ] includes 4 photos:
- Forward armament, distinctive invasion striping are prominent in this head-on shot of a Douglas A-20 Havoc photographed on June 6th. With six .50-cal machine guns in nose, two in dorsal turret, another in ventral tunnel, the present Havoc is formidable Ninth Air Force weapon over France. [ photo ]
- Carrying 2,000 pounds in demolition, incendiary, anti-personnel bombs, this version of the Havoc is fined with only two 50-cal guns in the nose. [ photo ]
- Packing tremendous forward firepower, this new version of the A-20 mounts four .50-ca1 machine guns in enclosed nose, two in recessed tunnels. [ photo ]
- Less awe-inspiring than the blockbusters, smaller bombs normally carried by A-20 have been effective against troops, buzz bomb sites, bridges. [ photo ]