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Bartel BM-1 Maryla
The Bartel BM-1 Maryla was a fighter aircraft design for the Polish military that did not advance beyond the design stage. It was designed in response to a Polish War Ministry competition in 1925 and was placed third, netting Bartel a zł 1,000 prize. Maryla was the name of Bartel's wife. The design was a single-seat parasol-wing monoplane. A distinctive feature were Y-shaped struts joining wing with an undercarriage. It was not built.
Engine: 1 × Lorraine 12E Courlis or Hispano-Suiza 12 cylinder liquid-cooled 340 kW (450 hp)
Wingspan: 11 m (36 ft 1 in)
Wing area: 22 m2 (240 sq ft)
Airfoil: Bartel 37/IIa
Length: 7 m (23 ft 0 in)
Height: 3 m (9 ft 10 in)
Empty weight: 1,020 kg (2,249 lb)
Gross weight: 1,500 kg (3,307 lb)
Maximum speed: 285 km/h (177 mph; 154 kn)
Crew: 1
2 × fixed, forward-firing 7.7 mm (0.303 in) Vickers machine guns in the fuselage
2 × fixed, forward-firing 7.5 mm (0.295 in) Darne machine guns in wings

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