http://auto.howstuffworks.com/rotary-engine.htm
zaujaly me tam tyto poznatky:
Since the rotors spin at one-third the speed of the output shaft, the main moving parts of the engine move slower than the parts in a piston engine. This also helps with reliability.
jestli to rotuje pomaleji nez 4 valec a pritom to jde rychle do haje, pak to opravdu nebude tak uzasne zarizeni

Typically, it is more difficult (but not impossible) to make a rotary engine meet U.S. emissions regulations.
They typically consume more fuel than a piston engine because the thermodynamic efficiency of the engine is reduced by the long combustion-chamber shape and low compression ratio.
ono to sice bude mi nejake ruzne vyhody, ale ocividne to neni pro bezny provoz, takze to, ze se to neujalo ve vetsim nebude jen otazka lobby
