Engineering:Fournier RF7
| RF7 | |
|---|---|
| |
| The RF7 prototype as G-LTRF | |
| Role | Motorglider |
| National origin | France |
| Manufacturer | Fournier |
| Designer | René Fournier |
| First flight | 5 March 1970[1] |
| Number built | Two |
| Developed from | Fournier RF 4 |
The Fournier RF7 was a single-seat motorglider designed and built in prototype form by René Fournier in France in 1970 and intended for series production by Sportavia-Pützer in Germany.
Design and development
The RF7 was a conventional motorglider design derived from Fournier's RF 4D,[1] a low-wing cantilever monoplane with an engine mounted in tractor configuration in the nose.[2] The sailplane-style undercarriage consisted of a retractable mainwheel, a fixed tailwheel, and small outriggers under each wing.[1] Compared to the RF 4. the wings were shorter and the tailplane surfaces larger.[1][2] The ailerons were also larger,[3] and the RF7 was fully stressed for aerobatics.[3][4]
Construction of the prototype (registered F-WPXV[3]) began in July 1969,[1] and the aircraft first flew on 5 March 1970.[1] It was displayed at the Hanover Air Show the following month, where the journal Flight International praised it for the quality of its finish "[i]n spite of its prototype status."[3] By 1971, Sportavia-Pützer abandoned its plans of series production of the type and hoped to market the RF7 in kit form instead.[4] By 1978, all development had been abandoned and the prototype was offered for sale.[5]
Specifications
Data from Taylor 1972, p.96
General characteristics
- Crew: one pilot
- Length: 6.05 m (19 ft 11 in)
- Wingspan: 9.40 m (30 ft 11 in)
- Wing area: 10.0 m2 (108 sq ft)
- Empty weight: 300 kg (660 lb)
- Gross weight: 445 kg (981 lb)
- Powerplant: 1 × Sportavia-Limbach SL 1700 D , 51 kW (68 hp)
Performance
- Cruise speed: 220 km/h (137 mph, 119 kn)
- Range: 650 km (403 mi, 350 nmi)
- Service ceiling: 7,000 m (23,000 ft)
See also
Related lists
Notes
References
- "Hanover Report". Flight International: 713–22. 30 April 1970. http://www.flightglobal.com/pdfarchive/view/1970/1970%20-%200785.html. Retrieved 2011-03-11.
- "Hanover Review". Flight International: 1436–46. 13 May 1978. http://www.flightglobal.com/pdfarchive/view/1978/1978%20-%200766.html. Retrieved 2011-03-11.
- Interavia 26: 1225. 1971.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- Taylor, John W. R. (1972). Jane's All the World's Aircraft 1972–73. London: Jane's Yearbooks.
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