Hirth HM 504

From Wikipedia, the free encyclopedia

The Hirth HM 504 was a 4 cylinder air cooled inverted inline engine. The 504 was a popular engine for light aircraft of the 1930-40's and it was used to power a number of Germany's trainer aircraft of WWII. The engine featured a cast magnesium alloy crankcase. The Hitachi Hatsukaze Model 11 was a Japanese licensed version.

[edit] Specifications (HM 504)

General characteristics

• Type: 4 cylinder air cooled inverted inline
• Bore: 105mm (4.13 in)
• Stroke: 115mm (4.53 in)
• Displacement: (244 cu in)
• Length: 957mm (37.70 in)
• Width: 505mm (19.90 in)
• Height: 726mm (28.60 in)
• Dry weight: 104kg (230 lbs)

Components

• Valvetrain: 1 inlet and 1 exhaust valve per cylinder
• Fuel type: 77 octane
• Cooling system: air

Performance

• Power output: 105hp @ 2500 RPM
• Compression ratio: 6.00:1
• Power-to-weight ratio: 2.87 lb/hp @ cruise speed

[edit] Applications

• Bücker Bü 131
• Bücker Bü 181
• BŻ-1 GIL
• Klemm Kl 35
• Repulogpegyar Levente II
• BŻ-1 GIL (helicopter)

[edit] External links

• Göbler-Hirthmotoren Company website

v • d • e Lists relating to aviation General Timeline of aviation · Aircraft (manufacturers) · Aircraft engines (manufacturers) · Airports · Airlines Military Air forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft Accidents/incidents General · Military · Commercial (airliners) · Deaths Records Airspeed · Distance · Altitude · Endurance · Most-produced aircraft