Beech King Air 90 

The Model 90 King Air was conceived as the Model 120 in 1961. In May 1963, Beechcraft began test flights of the proof-of-concept Model 87, a modified Queen Air with Pratt & Whitney Canada PT6A-6 engines. After 10 months of test flying the “proof-of-concept” King Air 87, the Model 87 was delivered to the United States Army as the NU-8F. The first production aircraft was delivered on October 8, and by the end of the month, 152 aircraft had been ordered; by year's end, seven had been built.

On July 14, Beech announced a new type, and a month later began accepting orders for the “King Air”, with deliveries to commence in Autumn 1964. On January 24, 1964, the first definitive prototype, by now designated Model 65-90 and also fitted with PT6A-6 engines, flew for the first time. The first production 65-90 was delivered in October of the same year.

After two years of production the 65-90, Beechcraft moved on to the 65-A90 in 1966. The A90’s TOGW was increased from 9,000 to 9,300 lbs and it was given an engine upgrade from the PT6A-6 engines found on the original 65-90 to more powerful PT6A-20 engines. Its flight deck was also redesigned, and it came equipped with a new engine de-icing system. The 65-A90 was the most widely produced of the variations as 206 of them were built.

Variations

King Air 87

“Proof-of-concept” test aircraft based on the Model A80 with PT6A-6 turboprops; one built.

King Air 65-90

Based on the Model 88 with two PT6A-6 turboprops and a 9000lb Take Off Gross Weight (TOGW); 112 built.

King Air 65-A90

Model 90 with TOGW increased to 9300lb, two 550shp PT6A-20 engines, redesigned flightdeck and a new engine de-ice system, 206 built.

King Air 65-A90-1

Based on the Model 87, unpressurised with square windows and 550shp PT6A-20 engine, 141 built and delivered to the US Army with the designation U-21A.

King Air 65-A90-2

Specialized electronic warfare variant of the A90-1 with five seats, three built as U-21Bs (later RU-21B).

King Air 65-A90-3

Variant of the A90-2 with improved electronic equipment, two-built for the US Army with the designation RU-21C.

King Air 65-A90-4

Project Guardrail variant of the A90-2, strengthened airframes and higher gross weight, 16 built for the US Army.

BEECHCRAFT 90 King Air (1964-1966) LJ-1 through LJ-113

Twin engine turboprop aircraft with retractable landing gear. The 90 King Air seats up to 9 passengers plus 1 pilot.

Performance specifications

  • Horsepower: 2 x 500 HP
  • Best Cruise Speed: 235 KIAS
  • Best Range (i): 1,270 NM
  • Fuel Burn: 67.8 GPH
  • Stall Speed: 75 KIAS
  • Rate of climb: 2,000 FPM
  • Rate of climb (1 engine out): 525 FPM
  • Ceiling: 28,400 FT
  • Ceiling (1 engine out): 17,700 FT
  • Takeoff distance: 1,350 FT
  • Landing distance: 1,250 FT
  • Takeoff distance over 50ft obstacle: 1,755 FT
  • Landing distance over 50ft obstacle: 1,870 FT

Weights

  • Gross Weight: 9,000 LBS
  • Empty Weight: 5,680 LBS
  • Maximum Payload: 2,976 LBS
  • Fuel capacity: 384 GAL

BEECHCRAFT A90 King Air (1966-1967) LJ-114 through LJ-317

Twin engine turboprop aircraft with retractable landing gear. The A90 King Air seats up to 9 passengers plus 1 pilot.

Performance specifications

  • Horsepower: 2 x 550 HP
  • Best Cruise Speed: 216 KIAS
  • Best Range (i): 1,160 NM
  • Fuel Burn: 71.0 GPH
  • Stall Speed: 77 KIAS
  • Rate of climb: 1,900 FPM
  • Rate of climb (1 engine out): 490 FPM
  • Ceiling: 30,200 FT
  • Ceiling (1 engine out): 17,700 FT
  • Takeoff distance: 1,730 FT
  • Landing distance: 1,250 FT
  • Takeoff distance over 50ft obstacle: 2,150 FT
  • Landing distance over 50ft obstacle: 1,960 FT

Weights

  • Gross Weight: 9,300 LBS
  • Empty Weight: 5,680 LBS
  • Maximum Payload: 2,976 LBS
  • Fuel capacity: 384 GAL

 

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