The rotational speed between rotor and crankshaft is different in Wankel rotary engine.
If the gear ratio is 2 : 3, the speed ratio of the crankshaft to the rotor is 3 : 1.
If the gear ratio is 3 : 4, the speed ratio of the crankshaft to the rotor is 4 : 1.
In addition, Peritrochoid curves are used here, please check the reference.
Gear Ratio 2 : 3
Dimensions: 130 * 145 * 110 mm^3
Gear Module: 1.5
Number of Teeth: 26, 39
Gear Ratio 3 : 4
Dimensions: 150 * 150 * 110 mm^3
Gear Module: 1.5
Number of Teeth: 39, 52
Contact plane clearance: 0.15 - 0.2 mm
STL files download link:
https://www.thingiverse.com/thing:671...
Reference:
Kenichi Yamamoto, 1981, Rotary Engine.
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