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The Wankel rotary Engine is not the best

engine design.

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Few people understand what takes place in the Wankel engine.

The rotor has one third more teeth in its gear than the stationary gear. In one revolution of the e-shaft all the teeth in the stationary gear mesh with two thirds of the teeth in the rotor. this forces the rotor to turn backwards two thirds.

At the same time the e-shaft makes a full 360 degree revolution. The eccentric lobe causes the rotor to orbit around the center of the e-shaft once going CCW two thirds and going CW one third to total 360 degrees.

Designers of the rotary engine fail to ask the question, How do I get the combustion to turn the e-shaft? A superior designer in his (or her) minds eye will stand a scrabble letter on edge on a flat surface. He will then balance a 6 inch ruler on it to represent a rotor surface. The with a little thought he will realize that to move the top of the scrabble letter to the right he has to apply pressure to the left hand side of the ruler.

Then looking at the rotor when it is positioned at the end of the compression stroke he will note that a combustion cavity should be drilled as close to the trailing apex seal as possible that is directed to the top of the e-shaft lobe. This is positioned at the 3:o'clock position for a crankshaft engine.

Designers of the Wankel try to get the combustion pressure to rotate the rotor CW when it is turning two thirds of a revolution CCW. Regardless the rotor gear is held against a stationary gear and cannot turn without the e-shaft turning first.