HOW A ROTARY WORKS?

Most people know how a conventional engine works. Pistons & Rods go up and down while the crank rotates. These pistons accelerate up and come to a complete stop before accelerating back down the cylinders. This and other reasons is why piston motors tend to shake and vibrate. Many manufactures have tried to overcome this by balance shafts that spin with counter weights to overcome these vibrations. Hydraulic motor mounts have also been tried. Along with the pistons and connecting rods you also have camshafts, valves added to this picture. A power cycle occurs when the fuel is ignited happens just once every 2 revolutions of the crank shaft per cylinder. So in a typical 4 cylinder you have 4 power cycles per 2 crankshaft revolutions  (A V8 would have 8 power cycles thus seeming smoother than a 4 cylinder).

Now for the Rotary, Simple in design but efficient in power. A Rotor wobbles around in almost a spinning motion in a chamber connected to a shaft by a gear and lobe of the shaft. This shaft turns 3x faster than the rotor speed. Fuel mixture and exhaust are feed in by ports in the housing allowing no other moving parts. Simple? You bet. Now take 2 of these and bolt them together and you have the Mazda Rotary motor. 13B equaling 1300cc. Horsepower is comparable to motors 2-3x it's displacement. Mazda may have perfected the perfect motor. Lightweight, powerful and oh so smooth. The Rotary engine does have a drawback. As the power cycle occurs 3 times per rotor revolution or 3x per crank RPM per rotor. So in a 2 rotor Mazda motor you would have 6 power cycles per 9 crank revolutions.

Now you know why I choose the Mazda Rotary as the transplant for my Project Zuki.