Lublin R-XII
| Lublin R-XII | |
|---|---|
| Role | Sports and touring plane |
| National origin | Poland |
| Manufacturer | Plage i Laśkiewicz |
| First flight | Autumn 1930 |
| Status | prototype |
| Primary user | Poland |
| Number built | 1 |
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The Lublin R-XII was the Polish three-seat sports and touring plane, designed in 1930 in the Plage i Laśkiewicz factory in Lublin, that remained a prototype.
Design and development
Plage i Laśkiewicz works was among factories, that developed sports aircraft for an order of the LOPP paramilitary organization. Its design, the Lublin R-XII, was basically a scaled down passenger plane Lublin R-XI. The main designer was Jerzy Rudlicki. The only prototype was flown in autumn 1930 (registration SP-AFB). It was not built in series.
The plane was not successful and its performance was not satisfactory because of too much weight. It did not take part in the 3rd Polish Light Aircraft contest because of a weight limit. It was owned by the factory and little used, after a few years it was scrapped. The R-XII was the only sports plane of Plage i Laśkiewicz.
Description
A mixed construction cantilever high-wing monoplane, single-engine, conventional in layout. It had a steel framed, canvas covered fuselage (engine part covered with duralumin) and a single-piece, plywood-covered, two-spar elliptical wing of wooden construction. The empennage was of steel construction, canvas covered. In a closed cabin under the wing there were two places side-by-side, with double controls, behind them was the third seat or a place for baggage. The cabin had single door on the left and front and rear doors on the right. It had a conventional fixed landing gear, with a rear skid, the main gear was joined with wings by vertical struts with oil and air shock absorbers. It had a single 5-cylinder air-cooled Armstrong-Siddeley Genet uncovered radial engine in front, delivering 88 hp take-off power and 80 hp nominal power, driving a two-blade propeller. A fuel tank was in the fuselage. The cruise fuel consumption was 21 l/h.
Specifications
Data from Glass, A. (1977)
General characteristics
- Crew: 1, pilot
- Capacity: 2, including co-pilot
- Length: 7.62 m ()
- Wingspan: 11.5 m ()
- Height: 2.36 m ()
- Wing area: 18.54 m² (ft²)
- Empty weight: 504 kg ()
- Useful load: 325 kg ()
- Max. takeoff weight: 829 kg ()
- Powerplant: 1 × Armstrong-Siddeley Genet 5-cylinder radial engine, 88 hp ()
Performance
- Maximum speed: 156 km/h
- Cruise speed: 135 km/h
- Stall speed: 73 km/h ()
- Range: 550 km ()
- Service ceiling: 4,750 m ()
- Rate of climb: 4.3 m/s ()
- Wing loading: 44.7 kg/m² (lb/ft²)
See also
- Related development
- Aircraft of comparable role, configuration and era
References
- Andrzej Glass: "Polskie konstrukcje lotnicze 1893-1939" (Polish aviation constructions 1893-1939), WKiŁ, Warsaw 1977, p. 149 (Polish)
External links
- Photos and drawings at Ugolok Neba page
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