Aero Commander 560 L26B U4A v1 is a photograph by John Straton which was uploaded on November 23rd, 2014.
Aero Commander 560 L26B U4A v1
The Aero Commander 500 family is a series of light-twin piston-engined and turboprop aircraft originally built by the Aero Design and Engineering... more
by John Straton
Title
Aero Commander 560 L26B U4A v1
Artist
John Straton
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Photograph
Description
The Aero Commander 500 family is a series of light-twin piston-engined and turboprop aircraft originally built by the Aero Design and Engineering Company in the late 1940s, renamed the Aero Commander company in 1950, and a division of Rockwell International from 1965. The initial production version was the Aero Commander 520. Piston-engined versions manufactured after 1967 are known as the Shrike Commander
The idea for the Commander light business twin was conceived by Ted Smith, a project engineer at the Douglas Aircraft Company.[2] Working part-time after hours through 1944, a group of A-20 engineers formed the Aero Design and Engineering Company to design and build the proposed aircraft with a layout similar to their A-20 bomber.[2][3] Originally the new company was going to build three pre-production aircraft but as the first aircraft was being built they decided to build just one prototype.[2] The final configuration was completed in July 1946 and was designated the Model L3805.[2]
Registered NX1946 the prototype first flew on 23 April 1948.[2] The L3805 accommodated up to five people and was powered by two Lycoming O-435-A piston engines.,[1] it was an all-metal high-wing monoplane with retractable undercarriage using components from a Vultee BT-13 Valiant. The market segment planned for this aircraft to be sold to small feeder airliner firms and was originally designed to carry seven passengers, but instead found use in the private business aircraft and military market.[4] Walter Beech test flew the aircraft in 1949 and expressed interest in buying the project, but passed on to develop the Beechcraft Twin Bonanza, Fairchild Aircraft also evaluated the prototype at its Hagerstown, Maryland headquarters.[3]
The prototype flew successfully and the company leased at no cost a new 26,000 square foot factory at Bethany near Oklahoma City to build a production version certified on 30 June 1950. Nearly 10,000 hours of redesign work went into the model including more powerful Lycoming GO-435-C2 engines with a combined horsepower of 520. The production model was named the Commander 520. The first Commander 520 was rolled out of the new factory in August 1951. Serial number one was used as an demonstrator then sold in October 1952 to the Asahi Shimbun Press Company of Tokyo.
General characteristics
Crew: Two
Capacity: four passengers
Length: 36 ft 9� in (11.22 m)
Wingspan: 49 ft 0� in (14.95 m)
Height: 14 ft 6 in (4.42 m)
Wing area: 255 ft� (23.69 m�)
Airfoil: NACA 23012 modified
Aspect ratio: 9.45:1
Empty weight: 4,635 lb (2,102 kg)
Max. takeoff weight: 6,750 lb (3,062 kg)
Powerplant: 2 � Lycoming IO-540-E1B5 air-cooled flat-six piston engines, 290 hp (216 kW) each
Performance
Maximum speed: 215 mph (187 knots, 346 km/h) at sea level (TAS)
Cruise speed: 203 mph (176 knots, 326 km/h) at 9,000 ft (2,750 m), 75% power, TAS
Stall speed: 68 mph (59 knots, 109 km/h) flaps and landing gear down, CAS
Minimum controllable speed: 75 mph (65.5 knots, 121 km/h)
Range: 1,078 miles (936 nmi, 1,735 km)
Service ceiling: 19,400 ft (5,913 m)
Rate of climb: 1,340 ft/min (6.8 m/s)
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November 23rd, 2014
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