The wankel rotary engine is simply a masterpiece of automotive engeneering.
However, some of the presente rotary engines still remain with the problem of high consumption of oil, as also fuel.
The rotary engines have a smoothly sound but when it takes to rev's highther their sound like a beast.
Rotary engines can support high rpm's near to 8500rpm's is the maximum till now.
The rotary engine is fitted with 2 rotors in eliptical shape.
Each one of the 3 faces o f the rotor can have nearly 700cc in maximum depending in the size o f bore and stroke, which allows to produce a high amount of power with less cc.