Bölkow Bo 207

The Bölkow Bo 207 was a four-seat light aircraft built in West Germany in the early 1960s, a development of the Klemm Kl 107 built during World War II.

Bo 207
Role Civil utility aircraft
National origin West Germany
Manufacturer Bölkow
First flight 10 December 1960[1]
Produced 1961-1963
Number built 92
Unit cost
$13,700 in 1962 [2]

Design and development

The Bo 207 is a wood construction, single-engined, cantilever low-wing cabin monoplane with a conventional landing gear with a tail wheel. The aircraft is powered by a Lycoming O-360 four-cylinder, direct-drive, horizontally opposed, air-cooled, piston engine.

Bölkow had built the two and three-seat Kl 107 and developed a four-seat variant, at first designated the Kl 107D.[3] The low-wing cabin monoplane had a re-designed cockpit and canopy and a larger tail.[3] The two prototype Kl 107Ds were built at Nabern and the first flew on 10 October 1960.[3] With the change of name of the company to Bolkow and the move to new factory at Laupheim production of the new variant was started at the new factory.[3] In May 1961 the design was re-designated the Bolkow F.207 but by July 1961 it was re-designated again as the Bolkow BO 207.[3]

The first of 90 production aircraft built at Laupheim was flown on 24 May 1961 and production continued until 1963.[3][4] A number of aircraft remained unsold and the last aircraft although built in 1963 did not fly until 1 April 1966.[4] One aircraft was built with tricycle landing gear, and designated BO 217B or sometimes known as the BO 214 but it was fitted with a conventional landing gear before it was sold.[4]

Variants
Kl 107D
Two prototypes later re-designated F.207 and then BO 207. V-1 prototype modified as the BO 207T.[3]
BO 207
Production aircraft, 90 built.[3][4]
BO 207B
One 207 temporary modified with a tricycle landing gear, also known as the BO 214.[4]
BO 207T
Prototype V-1 modified as a trainer with reduced weight.[3]

Specifications (Bo 207)

Data from Jane's All The World's Aircraft 1965-66.[5]

General characteristics

  • Crew: 1
  • Capacity: 3 passengers
  • Length: 8.30 m (27 ft 3 in)
  • Wingspan: 10.81 m (35 ft 6 in)
  • Height: 2.25 m (7 ft 5 in)
  • Wing area: 15.40 m2 (165.8 sq ft)
  • Aspect ratio: 7.6:1
  • Airfoil: NACA 23018 at root, NACA 23012 at tip
  • Empty weight: 715 kg (1,576 lb)
  • Max takeoff weight: 1,200 kg (2,646 lb)
  • Fuel capacity: 190 L (50 US gal; 42 imp gal)
  • Powerplant: 1 × Lycoming O-360-A1A air-cooled flat-four engine, 130 kW (180 hp)

Performance

  • Maximum speed: 255 km/h (158 mph, 138 kn) at sea level
  • Cruise speed: 200 km/h (120 mph, 110 kn) (econ cruise)
  • Stall speed: 82 km/h (51 mph, 44 kn)
  • Never exceed speed: 340 km/h (210 mph, 180 kn)
  • Range: 1,250 km (780 mi, 670 nmi)
  • Service ceiling: 4,300 m (14,100 ft)
  • Rate of climb: 3.6 m/s (700 ft/min)
  • Takeoff distance to 15 m (50 ft): 480 m (1,570 ft)
  • Landing distance from 15 m (50 ft): 460 m (1,510 ft)
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See also

Related development

References
  1. Taylor 1965, p.66.
  2. "Wings and Things: Bolkow 207". Flying. Vol. 70 no. 5. May 1962. p. 3.
  3. "The Bolkow Lightplanes Part Two". Archive. Air-Britain. 1990 (2): 49–50. 1990. ISSN 0262-4923.
  4. "The Bolkow Lightplanes Part Three". Archive. Air-Britain. 1990 (3): 73–76. 1990. ISSN 0262-4923.
  5. Taylor 1965, pp. 66–67.
  • Taylor, John W. R. (1965). Jane's All The World's Aircraft 1965-66. London: Samson Low, Marston.
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 192.
  • Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing. p. 85.
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