The Airco D.H.9a biplane bomber was an enlarged version of the D.H.9 with much needed improvements. It was equipped with the more efficient American Liberty engine, had a nose mounted radiator and even featured a spare tire mounted under the fuselage. Although a bit shorter than the D.H.9, its larger wings provided more lift for carrying heavier payloads. The D.H.9a entered service too late to have much of an impact on the outcome of the war.
Airco D.H.9a Specifications
Aircraft Manufacturing Co. Ltd.
Liberty, 12 cylinder, liquid cooled, inline V, 400 hp
45 ft 11½ in (14 m)
30 ft 3 in (9.22 m)
11 ft 4 in (3.45 m)
4,645 lb (2,107 kg)
123 mph (198 km/h)
18,000 ft (5,486 m)
2-3 machine guns
460-660 lb (208.7-299.4 kg) of bombs