oi! Dude, not getting mad at you, but there is a search button and www.google.com

Anyway, a supercharger on a car forces(forced induction) more air and fuel into the chamber than can happen normally(naturally aspirated.
Basically, your intake valves are open and exhasut valves are shut, then the supercharger forces air into the cyllinder to create a certain amount of "boost" which is just pressure so that the air and fuel is somewhat compressed before the piston comes down. then the intake valves close and the engine compresses the air/fuel more.

BUT, on most single cyllinder 2 strokes, like an RC engine, there are no valves... The intake and exhaust are open simutaniously. SO a supercharger will push air into the cyllinder faster, but won't create any boost because the air/fuel just gets pushed out the other side...

So, really, on an RC it will give you Higher RPMs, but won't create any more power (torque or HP). Actually it will reduce HP because of the Drag of the supercharger (superchargers are driven off the engine: eg, flywheel, rather than off the exhaust like a turbo) And depending on the tensile strength of the connecting rod, crank shaft, wrist pin etc... You could easily destroy your engine due to higher RPM's.

People have reported slightly higher speeds and better accel with superchargers, but it will make the engine significantly less fuel efficient, so your run times suffer horribly. Also there is the risk of destroying your engine.