avia.wikisort.org - Engine

The Praga Hostivař D was a four-cylinder, air-cooled, horizontally opposed aircraft engine first produced in Czechoslovakia in 1936 but which enjoyed its greatest success after World War II due to the explosion in popularity of sports flying. A version for helicopters was produced post World War II as the Praga DH

Praga D
Type	Air-cooled piston engine
National origin	Czechoslovakia
Manufacturer	Praga
First run	1936

Applications

• Mráz M-2 Skaut
• Aero XE-II
• IFIL-Reghin RG-6 (1957)

Specifications (Praga D)

Data from Jane's All The World's Aircraft 1951–52.[1]

General characteristics

• Type: four-cylinder, air-cooled, horizontally opposed
• Bore: 95 mm (3.74 in)
• Stroke: 100 mm (3.93 in)
• Displacement: 2.836 L (173 cu in)
• Length: 894 mm (35.19 in) (with propeller boss)
• Width: 810 mm (31.89 in)
• Height: 546 mm (21.5 in)
• Dry weight: 67 kg (148 lb)

Components

• Valvetrain: 1 inlet and 1 outlet valve per cylinder
• Fuel system: Zenith carburettor
• Fuel type: 72 octane
• Oil system: Dry sump pressure lubrication
• Cooling system: air

Performance

• Power output: 56 kW (75 hp) at 2,650 rpm
• Cruising power: 42 kW (56 hp) at 2,400 rpm
• Specific power: 19.7 kW/L (0.43 hp/cu in)
• Compression ratio: 6:1
• Specific fuel consumption: 235 g/hp hour (0.52 lb/hp hr) at rated power, 220 g/hp hour (0.48 lb/hp hr) at cruise power
• Oil consumption: 2 - 6 g/hp hour (0.004–0.013 lb/hp hour)

See also

Related lists

• List of aircraft engines

References

• Bridgman, Leonard (1951). Jane's All The World's Aircraft 1951–52. London: Sampson Low, Marston & Company, Ltd.

Further reading

Media related to Praga D at Wikimedia Commons

• Bridgman, Leonard, ed. (1947). Jane's all the World's Aircraft 1947. London: Sampson Low, Marston & Co. p. 37d.

На других языках

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[de] Praga D

Der Praga D ist ein Flugmotor des tschechoslowakischen Herstellers Praga aus dem Jahr 1938. Er ist eine leistungsgesteigerte Weiterentwicklung des Praga B-2 von 1936. Obwohl er noch vor dem Zweiten Weltkrieg entstanden war, erlebte er seine größte Verbreitung erst nach dessen Ende im Zuge des Wiederaufbaus der Luftfahrtindustrie des Landes. Eingesetzt wurde er vorrangig in Sportflugzeugen. Es existierte mit dem Praga DH jedoch auch eine Ausführung für Hubschrauber.

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- [en] Praga D

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