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The Sportavia-Pützer SFS 31 Milan is a single-seat motor glider that was produced in Germany in the early 1970s.

SFS 31 Milan
Role	Motor glider Type of aircraft
National origin	Germany
Manufacturer	Sportavia-Pützer, Scheibe Flugzeugbau
First flight	31 August 1969[1]
Number built	14 by 1973[1]
Developed from	Fournier RF 4, Scheibe SF-27

Design and development

The Milan was created by essentially combining the fuselage of the Fournier RF 4 with the wings of the Scheibe SF-27.[2][3][4] The resulting aircraft is a conventional motorglider design, a low-wing cantilever monoplane with a nose-mounted engine.[1][4] The undercarriage consists of a single retractable mainwheel, a fixed tailwheel, and an outrigger under each wing.[1][5] Construction is of wood, skinned in plywood and fabric.[1][5] The designation was created by combining the initials of the manufacturers involved (Sportavia, Fournier, and Scheibe), and adding together the model numbers of the two constituent aircraft designs.[1][4]

The SFS 31 prototype (registered D-KORO) first flew on 31 August 1969[1][4] and soon replaced the RF 4D in production at Sportavia-Pützer.[6] In 1971, Hans Huth piloted an SFS 31 to third place in the German national motorglider competition.[1][7]

Specifications

Data from Taylor 1977, p.560, except as noted

General characteristics

• Crew: one pilot
• Length: 6.05 m (19 ft 10 in)
• Wingspan: 15.00 m (49 ft 3 in)
• Height: 1.57 m (5 ft 2 in)
• Wing area: 12.0 m² (129 sq ft)
• Aspect ratio: 18.6
• Airfoil: Wortmann FX-61-184 at root, Wortmann FX-60-126 at tip
• Empty weight: 310 kg (683 lb)
• Gross weight: 440 kg (970 lb)
• Powerplant: 1 × Rectimo 4 AR 1200 , 29 kW (39 hp)

Performance

• Cruise speed: 180 km/h (112 mph, 97 kn)
• Range: 670 km (415 mi, 361 nmi)
• Service ceiling: 6,000 m (19,700 ft)
• Maximum glide ratio: 29:1[5]
• Rate of climb: 3.0 m/s (590 ft/min)

Notes

References

• Hardy, Michael (1982). Gliders & Sailplanes of the World. London: Ian Allan.
• "Hanover Report". Flight International: 713–22. 30 April 1970. Retrieved 2011-03-13.
• Ross, Peter (1 July 1971). "Soaring to Power". Flight International: 14–15. Retrieved 2011-03-13.
• Simpson, R.W. (1995). Airlife's General Aviation. Shrewsbury: Airlife.
• Taylor, John W.R. (1974). Jane's All the World's Aircraft 1973–74. London: Jane's Yearbooks.
• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.

На других языках

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[de] Scheibe SFS 31

Die Scheibe SFS 31 „Milan“ ist ein in den 1960er-Jahren von den Firmen Scheibe-Flugzeugbau und Sportavia-Pützer in Kooperation gefertigter Motorsegler.

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- [en] Sportavia-Pützer SFS 31 Milan

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