Douglas A-20 Boston/Havoc

The Douglas A-20 Boston/Havoc (DB-7) is an American twin-engine monoplane light bomber and night fighter. It first flew on October 26, 1938, entering service in March 1940 with the French Air Force. Designated as the DB-7 in France and the Soviet Union. The British referred to the bomber/attack variants as the Boston, night fighter and intruder variants as the Havoc. The USAAC designated the bomber/attack variants as the A-20 Havoc, night fighter as the P-70 and the photo-reconnaissance variant as the F-3. Production ended in September 1944 with 7,478 airframes of all variants built.

The airframe is an all-metal with a semi-monocoque fuselage, the mid-mounted wings and single fin tail assembly are a cantilever design with fabric-covered flight control surfaces. The undercarriage is a retractable tricycle type.

It was powered by two Wright R-2600, 14-cylinder twin-row air-cooled radial engine, one on each wing, driving three-bladed Hamilton-Standard propellers. The A-20G had a maximum speed of 510 km/h (317 mph), a cruise speed of 450 km/h (280 mph), a 7,620 m (25,00 ft) service ceiling and range of 1,650 km (1,025 mi), 3380 km (2100 mi) with bomb bay drop tank.

Early production A-20Gs had a solid nose armed with four 20mm Hispano cannon and two 0.50 calibre machine guns a single dorsal mounted 0.50 calibre machine gun, one ventral 0.30 calibre machine gun and 2,000 lbs of bombs internally. Later production replaced the nose cannons with 0.50 calibre machine guns, dorsal armament with a Martin turret with twin 0.50 machine guns and twin 0.50s in the ventral position. Underwing hardpoints for torpedoes or four 500 lb bombs.