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.
Introduced for the model year 1969, the larger, more powerful Baron 58 was developed from the Baron 55, with an increased gross weight of 5,400 lbs. Depending on the variant, the Baron 58 is fitted with either Continental IO-520 or IO-550 300-hp engine. The Baron 58 can cruise at 200 knots (370 km/h) at 7000 ft (2100 m). The most significant change was a fuselage stretch of 10 inches (25 cm) and the introduction of double rear fuselage doors and reversible club seats in the center row, eliminating the need for passengers to climb over the center seats or through the rear baggage door to access the rear seats. The entire fuselage was repositioned forward on the wing to address the aft CG issue that plagued the short-body models. The longer 58 fuselage has four side windows while the 55 and 56 fuselages have three. The larger fuselage and improved rear-cabin access have made the 58 far more popular with commercial air charter and cargo operators than the smaller 55 and 56.
ICAO type designator of all versions is BE58.