A Look at the PT6A-21 Powered Beechcraft King Air C90A

The Beechcraft King Air family is part of a line of twin-turboprop aircraft produced by Beechcraft. The King Air line comprises a number of models that have been divided into two families; the Model 90 and 100 series are known as King Airs, while the Model 200 and 300 series were originally marketed as Super King Airs, with “Super” being dropped by Beechcraft in 1996. Since production began in 1964, over 3,100 aircraft have been built. Production is currently still active, giving the Beechcraft King Air the longest continual production run of any civilian aircraft of its class.

Beechcraft created several variants of the original design, including the Model C90A, which featured the redesigned engine cowlings of the F90-1. The C90A received an increase in MTOW in 1987, being certified to 10,100 lb (4,580 kg). The C90A model was in production until 1992, by which time 235 had been built, all but 74 with the increased MTOW.

Beechcraft King Air C90A Powered by the PT6A-21

Single-pilot BOW is about 7,000 lb. to 7,100 lb. and the aircraft carry 2,573 lb. of fuel.  Max ramp weight is 10,160 lb., so tanks-full payload is less than 500-600 lb. Two 550 shp Pratt & Whitney Canada PT6A-21 turboprops power these aircraft. The props turn 2,200 rpm for takeoff, so cabin sound levels are obtrusive at maximum power. All engine takeoff distance (over a 50-ft. obstacle) is 2,790 ft. assuming sea-level/ISA conditions and 4,600 ft. when departing B&CA’s 5,000 ft. elevation, ISA+20C airport.

Via http://jetav.com/king-air-c90-series-powerful-solid-and-completely-reliable/

Why the King Air C90 Series stands out

  • Though certified for single pilot operation, the C90A can carry up to seven passengers and their baggage
  • Allowing for shorter trip times and lower operating costs, the King Air C90 Series features more powerful Pratt & Whitney PT6A-21 engines and a significantly longer wingspan than earlier models. These items allow an increase in maximum takeoff weights, better runway performance, higher speeds and lower fuel flows.
  • The all-weather, twin-engine, turboprop aircraft is as rugged and sturdy as it gets with a long history of reliability improvements.
  • Commonly referred to as the SUV of the sky, it can fly long hours.
  • The Executive configured cabin is preferred for business travel.

Beechcraft King Air C90A Capacity

Passenger and baggage amounts can greatly effect the performance of an aircraft since minimum runway lengths, range and speed are all effected by its weight.

Typical passenger configuration is the typical number of passengers the jet is configured to accommodate 5 passengers, however each jet will have a custom configuration to accommodate an owners specific needs and will therefore vary. Internal baggage capacity is the amount of available baggage which can be stowed inside the aircraft where there will be pressurization and temperature control. External baggage capacity is the amount of baggage space accessed from outside the aircraft and may not have pressurization or temperature control. Total number of bags is the total number of bags, using an average 5 cubic feet per bags plus 2 cubic feet of space between bags (unusable space) that you could expect to fit in the aircraft.Typical passenger configuration: 5 pax
Internal baggage capacity: 54 cubic feet
External baggage capacity: 0 cubic feet
Total number of bags: 8 bags

Beechcraft King Air C90A Speed

Cruise speeds vary greatly during the course of a flight, during climb, cruise and descent. In addition, there is a speed limit of 250 knots below 10,000 feet which will impact average speed for shorter flights greater than longer flights.

Maximum cruise is the speed the aircraft can fly at its optimal altitude where the air is thinner. Average cruise is calculated by taking an average trip length and takes into account the climb, speed limit, cruise and descent speeds. Long range cruise is the speed required to attain the maximum range.Maximum Cruise: 262 mph
Average Cruise: 262 mph
Long Range Cruise: 219 mph

Beechcraft King Air C90A Range

Range varies depending on the weight of the baggage and passengers as well as the required runway length, altitude and speed during flight.

Maximum range is the furthest the jet can fly at long range cruise speed at optimal altitude. Seats full range is the maximum range the jet will fly at long range cruise speed at optimal altitude with the maximum payload.Maximum range: 1,261 miles
Seats full range: 931 miles

Beechcraft King Air C90A Altitude

Service ceiling is the maximum altitude the jet can fly. The higher the altitude, the thinner the air which allows the jet to fly faster and more efficiently since the thinner air produces less friction. Higher altitude can also make the flight more pleasurable since the pilots have more altitude options to avoid turbulence and adverse weather.Service ceiling 30,000 feet

Beechcraft King Air C90A Required runway length

Balanced field length is the distance required to bring the aircraft up to take off speed and slow it to a full stop at an average air density and payload. Balanced field length is effected by many factors such as altitude, temperature, humidity and the condition of the runway which is effected by rain and snow. This calculation is performed by the pilot in command prior to every flight to ensure an adequate margin of safety in the event a take-off has to be aborted. Landing distance is the amount of runway required to land the aircraft at an average weight and air density and will vary greatly for each mission.Balanced field length: 5,167 feet
landing distance: 3,055 feet

Beechcraft King Air C90A Payload

Useful payload is the amount of weight available after the weight of the pilot, crew and usable fuel have been deducted. Operational weight It is the basic weight of the aircraft including the the crew, all fluids necessary for operation such as engine oil, engine coolant, water, unusable fuel and all operator items and equipment required for flight but excluding usable fuel and the payload. Maximum take off weight is the maximum total weight of the aircraft fully packed with passengers, crew, baggage and fuel able to take off. Maximum landing weight is the maximum weight of the aircraft can be at landing.Useful payload: 572 lbs
Operational weight: 6,825 lbs
Maximum take off weight: 10,100 lbs
Maximum landing weight: 9,600 lbs

Beechcraft King Air C90A Specs

Price New$2.0M
Price Used (Min)$475K
Price Used (Max)$675K
Passengers (Typical)5
Volume6 cu m
Height1 m
Width1 m
Length4 m
Year Started1984
Year Ended1992
Range1,336 km
Max Takeoff Weight4,581 kg
Max Cruise Speed463 km/hr
Max Altitude9,083 m
Balanced Field Length1,615 m
Total Fixed Cost/Year$272,270
Total Fixed Cost/Hour$523
Total Fixed Cost/Unit Distance$3 /km
Total Misc Cost/Year$79,375
Total Misc Cost/Hour$120
Total Crew Cost/Year$159,445
Total Fuel Cost/Hour$394
Total Mx Cost/Hour$590
Total Variable Cost/Year$574,812
Total Variable Cost/Hour$1,105
Total Variable Cost/Unit Distance$8 /km

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