Praga BH-44

The Praga BH-44 (designated E-44 by the Czechoslovak Air Force) was a prototype Czechoslovak fighter biplane of the early 1930s. Only two were built, the rival Avia B-34 being ordered instead.

Praga BH-44
Class Aircraft
Type Fighter
Manufacturer CKD-Praga
Origin Czechoslovakia
Country Name Origin Year
Czechoslovakia 1932
Country Name Operational Year Retirement Year
Czechoslovakia View
ManufacturerName Production From Production To Quantity
CKD-Praga 2 View

In 1932, CKD-Praga, the aircraft department of the Czechoslovak company Praga, entered a competition to design a new fighter for the Czechoslovak Air Force, with its design, the BH-44, competing against designs from Avia (the B-34) and Letov (the Š-231). The BH-44 was a single-bay biplane of mixed construction, with wooden wings and a fabric covered, steel-tube fuselage. Powerplant was a single Praga ESV water-cooled V12 engine.

The first prototype made its maiden flight on 19 July 1932. Performance was unimpressive, as the engine delivered only 500 horsepower (370 kW) instead of the promised 750 horsepower (560 kW). A second prototype (sometimes called the EH-144), fitted with a supercharged Praga ESVK engine, flew in April 1934, but performance remained disappointing. The first prototype was therefore re-engined with a 650 horsepower (480 kW) Rolls-Royce Kestrel VII, flying in this form on 30 October 1934, and as such was evaluated by the Czechoslovak Air Force as the E-44. The imported Kestrel engine worked poorly with the fuel used by the Air Force, however, and the type was rejected, the B-34 being purchased instead.

Role Fighter aircraft
National origin Czechoslovakia
Manufacturer CKD-Praga
First flight 19 July 1932
Status Prototype only
Number built 2

General characteristics

  • Crew: 1
  • Length: 7.62 m (25 ft 0 in)
  • Wingspan: 9.25 m (30 ft 4 in)
  • Wing area: 23.14 m2 (249.1 sq ft)
  • Empty weight: 1,462 kg (3,223 lb)
  • Gross weight: 1,837 kg (4,050 lb)
  • Powerplant: 1 × Praga ESV water-cooled V12 engine, 560 kW (750 hp) (predicted power - actual power 500 hp (370 kW))


  • Maximum speed: 330 km/h (205 mph; 178 kn)
  • Endurance: 1.8 hours
  • Time to altitude: 5.2 minutes to 3,000 m (9,800 ft)

End notes