This fighter is sometimes called "PZL.62", but the correct designation is PZL.55.^[1]

PZL.55 was a Polish pre-war initial project for a fighter aircraft, designed by Jerzy Dąbrowski of the PZL works. The design was for a single-seat low-wing monoplane, developed from the PZL.26 sports plane and private sports plane project designed by Jerzy Dąbrowski for his own purposes.

The prototype PZL.55/I was designed for the Hispano-Suiza 12Y inline engine but production aircraft were intended to be powered by Hispano-Suiza 12Z inline engines.^[2]

Planned specifications (PZL.55)

Data from ^[3]

General characteristics

• Length: 9.6 m (31 ft 6 in)
• Wingspan: 11.25 m (36 ft 11 in)
• Height: 2.7 m (8 ft 10 in)
• Wing area: 22.5 m² (242 sq ft)
• Empty weight: 2,300 kg (5,071 lb)
• Gross weight: 3,250 kg (7,165 lb)
• Powerplant: 1 × Hispano-Suiza 12Z V-12 liquid-cooled piston engine, 1,200 kW (1,600 hp)

Performance

• Maximum speed: 660 km/h (410 mph, 360 kn)
• Range: 800 km (500 mi, 430 nmi)

Armament

• Guns: 1 x Hispano-Suiza HS.404 20 mm (0.787 in) cannon, 6-8 x 7.92 mm (0.312 in) PWU wz.36 machine guns