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Advantages of super long stroke

1.Super long stroke means increased swept volume allowing more mass of air to be drawn into the cylinder which in turn allows more fuel to be burnt, hence increasing power output
2.super long stroke increases piston travel time and thereby decreases crank speed so more time for combustion during the stroke.
3. The efficiency of Large dia propellers is best at slower RPM...With super long stroke we can have slower RPM of engine with no change in mean piston speed of the engine
4. Low grade fuels can be used
5.  lower horizontal space consumed by cross head reduction of weight for same power disadvantage- increased lateral force on guides due to the relatively short connecting rods
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