Hirth HM 504 - Engine - avia.wikisort.org

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The Hirth HM 504 is a four-cylinder air-cooled inverted inline engine. The HM 504 was a popular engine for light aircraft of the 1930s-1940s, and it was used to power a number of Germany's trainer aircraft of World War II. The engine featured a cast magnesium alloy crankcase.[1] The Hitachi Hatsukaze Model 11 was a Japanese licensed version.

Hirth HM 504

Hirth HM 504 on display at the Flugausstellung Hermeskeil
Type	Inline piston engine
National origin	Germany
Manufacturer	Hirth-Motoren GmbH, Stuttgart-Zuffenhausen
Major applications	Bücker Bü 131
Developed into	Hitachi Hatsukaze

Applications

Bücker Bü 131
Bücker Bü 181
BŻ-1 GIL (helicopter)
Klemm Kl 35
Matra-Cantinieau MC-101 (helicopter)
Morane-Saulnier MS.603
Payen Arbalète
Repülőgépgyár Levente II

Specifications (HM 504 A-2)

Data from Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944,[2] Der Flugmotor. Bauteile und Baumuster[3]

General characteristics

Type: 4-cylinder air-cooled inverted inline
Bore: 105 mm (4.13 in)
Stroke: 115 mm (4.53 in)
Displacement: 3.980 l (242.87 cu in)
Length: 945 mm (37.2 in)
Width: 520 mm (20.5 in)
Height: 780 mm (30.7 in)
Dry weight: 107 kg (236 lb) dry, unequipped

124 kg (273 lb) wet, equipped

Components

Valvetrain: 1 inlet and 1 exhaust under-valve per cylinder driven by pushrods and rockers
Fuel type: 80 Octane
Oil system: dry sump, pressure feed with scavenge
Cooling system: air-cooled

Performance

Power output:

105 PS (104 hp; 77 kW) at 2,530 rpm (5 minutes) at sea level
95 PS (94 hp; 70 kW) at 2,450 rpm (30 minutes) at sea level
85 PS (84 hp; 63 kW) at 2,360 rpm (max. continuous / cruise) at sea level

Specific power: 26.35 PS/L (0.43 hp/cu in; 19.38 kW/L)
Compression ratio: 6.2:1
Specific fuel consumption: 0.228 kg/PSh (0.510 lb/(hp⋅h); 0.310 kg/kWh) at max continuous
Oil consumption: 0.002–0.003 kg/PSh (0.004–0.007 lb/(hp⋅h); 0.003–0.004 kg/kWh) at max continuous
Power-to-weight ratio: 0.98 PS/kg (0.44 hp/lb; 0.72 kW/kg)
B.M.E.P.: 9.37 atm (9.49 bar; 137.7 psi)

References

Wikimedia Commons has media related to Hirth HM 504.

Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. p. 77. ISBN 978-1-85260-163-8.
Schneider, Helmut (Dipl.Ing.) (1944). Flugzeug-Typenbuch. Handbuch der deutschen Luftfahrt- und Zubehör-Industrie 1944 (in German) (Facsimile reprint 1986 ed.). Leipzig: Herm. Beyer Verlag. p. 396. ISBN 381120484X.
Katz, Hans (Dr.Ing) (1940). Der Flugmotor. Bauteile und Baumuster. Luftfahrt Lehrbücherei Band 7. Berlin: de Gruyter.

External links

Göbler-Hirthmotoren Company website (nothing in there about pre-war engines)

v t e Hirth and Heinkel-Hirth aircraft engines
Piston engines	HM 8 HM 60 HM 150 HM 500 HM 501 HM 504 HM 506 HM 508 HM 512 HM 515
Two-strokes	F-23 F-30 F-33 F-36 F-40 F-263 2302 2702 2703 2704 2706 3002 3003 3202 3203 3502 3503 3701 3702 3703 4103 4201
Gas turbines	HeS 1 HeS 3 HeS 8 HeS 30 HeS 40 HeS 50 HeS 60 HeS 011

На других языках

[de] Hirth HM 504

Der Hirth HM 504 ist ein deutscher Flugmotor, der hauptsächlich in den Schul- und Sportflugzeugen der 1930er Jahre zum Einsatz kam.

- [en] Hirth HM 504

[it] Hirth HM 504

L'Hirth HM 504 era un motore aeronautico quattro cilindri in linea rovesciati, raffreddato ad aria, progettato dalla tedesca Hirth Motoren GmbH ed installato su molti velivoli leggeri e da addestramento nel periodo tra gli anni trenta e quaranta. L'HM 504 era caratterizzato dal peso contenuto grazie anche al basamento realizzato in lega di magnesio.

[ru] Hirth HM 504

Hirth HM 504 — немецкий поршневой авиационный двигатель воздушного охлаждения, разработанный и производившийся с 1934 года компанией Hirth-Motoren GmbH. Устанавливался преимущественно на учебных и спортивных самолётах 1930-х и 40-х годов; в частности, им был оснащён известный Bücker Bü 131.

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