Airhead engines

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Fudmucker

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BMW R80GS
There are some nice engine drawings here:

https://www.ketchum.org/BMWEnginePix/index.htm

Also an interesting pic of a 247 motor converted for aircraft use:

AvAirhead-529x437.gif


Note that the cylinders (and therefore the crankshaft profile) have been reversed.
The exhaust ports are facing the bell housing where the reduction gear replaces the gearbox.
The inlet is a rather crude over the top arrangement...?
 
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