- Hirth HM 504
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.Specifications (HM 504)
pistonspecs
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)
diameter=width=505mm (19.90 in)
height=726mm (28.60 in)
weight=104kg (230 lbs)
valvetrain=1 inlet and 1 exhaust valve per cylinder
supercharger=
turbocharger=
fuelsystem=
fueltype=77 octane
oilsystem=
coolingsystem=air
power=105hp @ 2500 RPM
specpower=
compression=6.00:1
fuelcon=
specfuelcon=
oilcon=
power/weight=2.87 lb/hp @ cruise speedApplications
*
Bücker Bü 131
*Bücker Bü 181
*BŻ-1 GIL
*Klemm Kl 35
*Repulogpegyar Levente II
*BŻ-1 GIL (helicopter)External links
* [http://www.hirth-engines.de Göbler-Hirthmotoren Company website]
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