Blume Bl.502

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Blume BL.503 D-EKUB Riem 30.07.65 edited-4.jpg
The sole Blume Bl.503 to be completed pictured at Munich's Riem Airport in 1965
Role Civil utility aircraft
National origin West Germany
Manufacturer Walter Blume
Designer Walter Blume
First flight 14 March 1957
Primary user The designer
Number built 2

The Blume Bl.500, Bl.502, and Bl.503 were a family of four-seat light aircraft designed in West Germany by Dr Walter Blume in the late 1950s.

Design and development[edit]

Derived from his Arado Ar 79, the basic design shared by all models was that of a conventional low-wing cantilever monoplane with retractable tricycle undercarriage and all-metal construction. The Bl.500 prototype was built for Blume at the Focke-Wulf plant and was powered by a Lycoming O-320 engine of 112 kW (150 hp). This led to a modified version, the Bl.502 that achieved German type certification and was offered for sale alongside the generally similar Bl.503 with a more powerful engine. However, no orders were forthcoming and Blume abandoned the project.

Operational history[edit]

The final example of the design, the Blume Bl.503 was still active in 1965.


intended production version with Lycoming O-320
proposed production version with Lycoming O-360. A single example was completed.

Specifications (Bl.502)[edit]

Data from Jane's All The World's Aircraft 1961–62[1]

General characteristics

  • Crew: 1
  • Capacity: 3 passengers
  • Length: 8.15 m (26 ft 9 in)
  • Wingspan: 10.50 m (34 ft 5 in)
  • Height: 2.40 m (7 ft 10 in)
  • Wing area: 15.0 m2 (161 sq ft)
  • Aspect ratio: 7.35:1
  • Empty weight: 670 kg (1,477 lb)
  • Gross weight: 1,120 kg (2,469 lb)
  • Powerplant: 1 × Lycoming O-320 air-cooled flat-four engine, 110 kW (150 hp)


  • Maximum speed: 250 km/h (160 mph, 130 kn)
  • Cruise speed: 220 km/h (140 mph, 120 kn) (70% power)
  • Range: 900 km (560 mi, 490 nmi)
  • Endurance: 4.1 hr
  • Service ceiling: 4,800 m (15,700 ft)
  • Rate of climb: 5.11 m/s (1,005 ft/min)
  • Takeoff distance to 15 m (50 ft): 375 m (1,230 ft)

See also[edit]

Related development


  1. ^ Taylor 1961, p. 77
  • Taylor, John W. R. (1961). Jane's All The World's Aircraft 1961–62. London: Sampson Low, Marston & Company.
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 169.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 890 Sheet 49.