The Beechcraft Baron is a light twin-engined piston aircraft designed and produced by Beechcraft. The aircraft was introduced in 1961. A low-wing monoplane developed from the Travel Air, it remains in production. Design and development The direct predecessor of the Baron was the Beechcraft 95 Travel Air, which incorporated the fuselage of the Bonanza and the tail control surfaces of the T-34 Mentor military trainer. To create the new airplane, the Travel Air's tail was replaced with that of the Beechcraft Debonair, the engine nacelles were streamlined, six-cylinder engines were added, and the aircraft's name was changed. In 1960, the Piper Aztec was introduced, using two 250 hp Lycoming O-540 engines; Cessna too had improved its 310 with two Continental IO-470 D, producing 260 hp. Meanwhile, Beechcraft's Bonanza had been improved with a Continental IO-470-N. But the answer to competition was to make a true twin-engined variant of the Bonanza. The first model, the 55, was powered by two six-cylinder IO-470-L engines producing 260 hp at 2,625rpm each; it was introduced in 1961. The first Baron included the fully-swept vertical stabilizer of the Debonair while still retaining the four to four+five place seating of the Travel Air. Variants Barons come in three basic types: the Baron 55 (short body), Baron 56 (short body) and Baron 58 (long body), with several sub-variants each. Baron 55 The early Baron 55, A55 and B55 were fitted with Continental IO-470 engines and had gross weights of 4880 to 5100 lb (2,200 to 2,300 kg). These had a typical cruise speed of 190 knots (350 km/h) at 7000 ft (2100 m), and came with 116 or 136 US gallon (440 or 515 L) fuel tanks. Although its performance was eclipsed by the later variants, the B55 continued to be offered as the basic economy model until the end of the Baron 55 model run, and it would ultimately capture about half of total 55-series sales. The C55, D55 and E55 models used Continental IO-520 engines, increasing cruise speed to . Gross weight increased to and the forward fuselage was lengthened by to increase baggage space in the nose. 136, 142, or 166 US gallon (515 or 628 L) fuel tanks were offered. The Baron 55 was sold with four seats in two rows as standard equipment; a third-row fifth seat was optional initially, and a sixth seat became optional on the A55. However, the lack