Specifications (Blenheim MK.IV) Crew : 3 Length : 12.98 m Wingspan : 17.17 m Height : 3.00 m Empty weight : 4,450 kg Loaded weight : 6,545 kg Powerplant : 2 x 920 hp Bristol Mercury XV radial engines Maximum speed : 428 km/h Range : 2,351 km Ceiling : 11,000 m Armament : 5 x 7.7mm machine guns and up to 540 kg (1,200 lb) of bombs