The Beechcraft Model 99 is a civilian aircraft produced by Beechcraft. It is also known as the Beech 99 Airliner and the Commuter 99. The 99 is a twin-engine, unpressurized, 15 to 17 passenger seat turboprop aircraft, derived from the earlier Beechcraft King Air and Queen Air. It uses the wings of the Queen Air, the engines and nacelles of the King Air, and sub-systems from both, with a specifically designed nose structure.
Design and development
Designed in the 1960s as a replacement for the Beechcraft Model 18, it first flew in July 1966. It received type certification on May 2, 1968, and 62 aircraft were delivered by the end of the year.
In 1984, the Beechcraft 1900, a pressurized 19-passenger airplane, was introduced as the follow-on aircraft.
Production ended in early 1987 with 239 airframes completed. Nearly half the Beech 99s in airline service are now operated as freighters by Ameriflight.
99 Airliner: Twin-engined Commuter and cargo transport aircraft, 10,400 lb max takeoff weight, accommodation for a crew of two and up to 15 passengers. powered by two 550-hp (410-kW) Pratt & Whitney Canada PT6A-20 turboprop engines.
99 Executive: Executive transport version of the 99 Airliner.
99A Airliner: Same as the 99 Airliner, but powered by two Pratt & Whitney PT6A-27 engines flat-rated at 550 hp.
A99A Airliner: One of a kind, 99A Airliner without wing center section tanks; this aircraft has been scrapped.
B99 Airliner: Improved version, 10,900 lb max takeoff weight, powered by two 680-hp (507-kW) Pratt & Whitney PT6A-27/28 engines.
B99 Executive: Executive transport version of the B99 Airliner.
C99 Commuter: Improved version, 11,300 lb (5,100 kg) max takeoff weight, Pratt & Whitney PT6A-36 (engines flat rated at 715 hp)
Capacity: Normally 15 passengers (8-seat 'Business Executive' model available) / Up to 3,600 lb (1,633 kg) depending upon fuel requirements; some aircraft have a belly pod for additional baggage or cargo
Propellers: 3-bladed Hartzell constant speed feathering and reversible propellers
Performance
Cruise speed: 205 kn (236 mph, 380 km/h) at 10,000 ft (3,000 m)
Range: 910 nmi (1,050 mi, 1,690 km)
Service ceiling: 26,200 ft (8,000 m)
Rate of climb: 1,700 ft/min (8.6 m/s)
Notable accidents and incidents
In 1987, pilot Henry Dempsey survived an incident in which he was sucked out of the aircraft when he fell against a door in the hold which opened. He managed to hang on until the plane made an emergency landing and suffered only minor injuries.[4][5]
Holmström Air flight, a Beechcraft 99 crashed May 8, 1989 at Oskarshamn, Southern Sweden on final approach to Oskarshamn airport. The investigation found that the accident was probably caused by the pilot's inability to compensate for the rapid nose pitch-up that occurred when the wing flaps were deployed, engines running at high power and with the plane too aft-heavy. The plane pitched sharply up, stalled and fell to the ground. The crash and subsequent fire killed all 16 onboard including the two pilots. The passengers were made up of politicians and their aides working for the National telecom planning committee as well as two young students.[6][7]
