Bartel BM-1

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 similar in configuration to the Nieuport-Delage sesquiplanes of the era. A distinctive feature were Y-shaped struts joining wing with an undercarriage. It was not built.

Specifications (as designed)

Data from Polish Aircraft 1893–1939,^[1] Bartel BM-1 "Maryla", 1925^[2]

General characteristics

• Crew: 1
• Length: 7 m (23 ft 0 in)
• Wingspan: 11 m (36 ft 1 in)
• Height: 3 m (9 ft 10 in)
• Wing area: 22 m² (240 sq ft)
• Airfoil: Bartel 37/IIa
• Empty weight: 1,020 kg (2,249 lb)
• Gross weight: 1,500 kg (3,307 lb)
• Powerplant: 1 × Lorraine 12E Courlis or Hispano-Suiza 12 cylinder liquid-cooled piston engine, 340 kW (450 hp)

Performance

• Maximum speed: 285 km/h (177 mph; 154 kn)

Armament

• 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

References

Further reading

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. 

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