Who Actually Invented the Rotary Engine?
2 Answers
German engineer Felix Wankel successfully developed the world's first rotary engine in 1957 and obtained the patent. Introduction to rotary engines: 1. Advantages: The rotor of a rotary engine performs power stroke once per rotation, compared to conventional four-stroke engines that require two rotations per power stroke. This gives it a higher power-to-displacement ratio (smaller engine size can deliver greater power output). 2. Characteristics: Due to the axial operation characteristics of rotary engines, they can achieve higher operating speeds without requiring precise crankshaft balancing. The entire engine has only two moving components, representing significant structural simplification compared to conventional four-stroke engines with over twenty moving parts including intake/exhaust valves, thereby greatly reducing potential failures. Beyond these advantages, rotary engines also feature compact size, lightweight construction, and low center of gravity.
I recently read some automotive history materials. The inventor of the rotary engine was undoubtedly Felix Wankel, a German engineer who began developing it in the 1930s. Back then, he wanted to create something different—not the traditional piston setup with its heavy vibrations, but a cleverly designed triangular rotor that spins inside. In the 1960s, NSU incorporated it into their cars, and after Mazda took over, it became a sensation. The classic RX-7 model used it brilliantly, delivering smooth and exhilarating performance, like a silky rollercoaster ride. Unfortunately, it had its flaws—poor sealing leading to oil leaks, terrible fuel efficiency, and eventual obsolescence due to stricter environmental regulations. Still, today, many car enthusiasts remain devoted to it, happily refurbishing and driving second-hand models. Knowing who Wankel is counts as basic knowledge in car enthusiast circles, as his engine represents the courage of technological innovation, even if it wasn’t perfect in the end.
