Praga D
title: "Praga D" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["boxer-engines", "1930s-aircraft-piston-engines"] topic_path: "sports" source: "https://en.wikipedia.org/wiki/Praga_D" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="infobox aero engine"]
| Field | Value |
|---|---|
| name | Praga D |
| image | File:Praga D (Letectví, No. 8, 1946, p. 243).jpg |
| engine_type | Air-cooled piston engine |
| manufacturer | Praga |
| national_origin | Czechoslovakia |
| first_run | 1936 |
| :: |
| name=Praga D | image=File:Praga D (Letectví, No. 8, 1946, p. 243).jpg | caption= |engine_type=Air-cooled piston engine |manufacturer=Praga |national_origin=Czechoslovakia |first_run=1936 |major_applications= |produced= |number_built= |developed_from= |variants_with_their_own_articles=
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
Applications
Specifications (Praga D)
| and start a new, fully formatted line with -- |ref=Jane's All The World's Aircraft 1951–52. |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) |diameter= |width=810 mm (31.89 in) |height=546 mm (21.5 in) |weight=67 kg (148 lb) |valvetrain=1 inlet and 1 outlet valve per cylinder |supercharger= |turbocharger= |fuelsystem=Zenith carburettor |fueltype=72 octane |oilsystem=Dry sump pressure lubrication |coolingsystem=air |power=56 kW (75 hp) at 2,650 rpm
- Cruising power: 42 kW (56 hp) at 2,400 rpm |specpower=19.7 kW/L (0.43 hp/cu in) |compression=6:1 |fuelcon=
|specfuelcon=235 g/hp hour (0.52 lb/hp hr) at rated power, 220 g/hp hour (0.48 lb/hp hr) at cruise power |oilcon=2 - 6 g/hp hour (0.004–0.013 lb/hp hour) |power/weight=
References
References
- Bridgman 1951, p. 48d.
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