A Brief Look at the PT6A Powered Beechcraft Model 99 & Variants

The Beechcraft Model 99 is a civilian aircraft produced by the 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

Jamaica Air Shuttle Beech 99 In Flight

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. Nearly half the Beech 99s in airline service are now operated as freighters by Ameriflight.

Variants

  • 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)
Ameriflight Beech C99 freighter takes off from the Mojave Airport

Operators

In July 2018, 105 Beechcraft B99 were in airline service, all in the Americas:[1]

Specifications (Model 99A)

General characteristics

  • Crew: One
  • Capacity: Normally 15 passengers (8-seat ‘Business Executive’ model available)
  • Length: 44 ft 6¾ in (13.58 m)
  • Wingspan: 45 ft 10½ in (13.98 m)
  • Height: 14 ft 4⅓ in (4.37 m)
  • Wing area: 279.7 ft² (25.99 m²)
  • Empty weight: 5,533 lb (varies depending upon equipment and configuration) (2,515 kg)
  • Loaded weight:
  • Max. takeoff weight: 10,400, 10,900, or 11,300 lb – see above (4,727 kg)
  • Powerplant: 2 × Pratt & Whitney PT6A-20, -27. or -36 turbopropHartzell constant speed, feathering, and reversing, 550, 680, or 715 eshp depending upon model/mod status each

Performance

First read at https://www.revolvy.com/page/Beechcraft-Model-99

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