PZL.46 Sum

PZL.46 Sum (sheatfish) was a light bomber of the Polish Air Force from World War II. Although it was in production in the spring of 1939 none were completed before the outbreak of the war. Only two prototypes were flown.

General characteristics

• Crew: 3
• Length: 10.5 m (34 ft 5 in)
• Wingspan: 14.6 m (47 ft 11 in)
• Height: 3.3 m (10 ft 10 in)
• Wing area: 27 m² (290 sq ft)
• Empty weight: 1,995 kg (4,398 lb)
• Gross weight: 3,550 kg (7,826 lb)
• Powerplant: 
  • PZL-Bristol Pegasus XXB 9-cylinder air-cooled radial piston engine, 685 kW (918 hp) maximum power (short duration) 
• Propellers: 3-bladed Hamilton/PZL variable-pitch propeller

Performance

• Maximum speed: 
  • 425 km/h (264 mph, 229 kn) at 3,600 m (11,811 ft)
  • 350 km/h (220 mph; 190 kn) at sea level
• Stall speed: 110 km/h (68 mph, 59 kn)
• Range: 1,300 km (810 mi, 700 nmi)
• Service ceiling: 7,700 m (25,300 ft)
• Rate of climb: 6 m/s (1,200 ft/min)
• Wing loading: 131.1 kg/m² (26.9 lb/sq ft)
• Power/mass: 0.196 kW/kg (0.119 hp/lb)

Armament

• Guns: 6 x machine guns:
  • 2 x 7.92 mm FK wz.36 fixed in nose with synchronising gear;
  • 2 x 7.92 mm FK wz.36 fixed in wings;
  • 1 x 7.92 mm karabin maszynowy obserwatora wz.37 in rear upper station (production planes were to have 2)
  • 1 x 7.92 mm karabin maszynowy obserwatora wz.37 in rear underbelly station;
• Bombs: 600 kg (1,323 lb) of bombs under wings.

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