Wankel engine

Motor vehicle engine Wankel rotary engines Overview Also called "RENESIS" (RX-8 engine) Production 1967 Layout 0.4L 360cc (22cuin) 0.8L 798cc (48.7cuin) 1.0L 982cc (59.9cuin) 1.2L 1,146cc (69.9cuin) 1.3L 1,308cc (79.8cuin; 1.308L) 2.0L 1,962cc (119.7cuin) 2.6L 2,616cc (159.6cuin; 2.616L) Combustion 1982 & up Fuel type Output 100–700hp (75–522kW) 20–200lb⋅ft (27–271N⋅m) Dimensions Dry weight 347lb (157kg) The Mazda Wankel engines are a family of Wankel engines were invented in 1950s by Since the end of production of the Displacement [ ] See also: 3 ⋅ 3 ⋅ D e p t h ⋅ R a d i u s 2 ⋅ ( O f f s e t / R a d i u s ) 1000 Note that this only counts a single face of each rotor as the entire rotor's displacement, because with the eccentric shaft – crankshaft – spinning at three times the rate of the rotor, As Wankel engines became commonplace in The key for comparing the displacement between the 4-cycle engine and the rotary engine is in studying the number of rotations for a thermodynamic cycle to occur. For a 4-cycle engine to complete a thermodynamic cycle, the engine must rotate two complete revolutions of the crankshaft, or 720°. By contrast, in a Wankel engine, the engine rotor rotates at one-third the speed of the crankshaft. Each rotation of the engine (360°) will bring two faces through the combustion cycle (the torque input to the eccentric shaft). This said, it takes three complete revolutions of the crankshaft, or 1080°, to complete the entire thermodynamic cycle. To g...

Typically, Wankel engines are limited to a rotor speed of 3,000 revolutions per minute (rpm) because of the excessive crankshaft bending caused by the centrifugal forces of the eccentric rotor. The Szorenyi engine is not rev-limited in this regard, as it used a balanced rotor. The Wankel rotary engine has been an ideal choice for many owners and operators of small, propeller-driven aircraft. Compared to conventional piston engines, Wankel rotaries are small, lightweight, and has a high power-to-weight ratio. They’re nearly vibrationless, they can’t seize or knock, and they have fewer moving parts (to break). At this point, it’s difficult to improve on the Wankel design; that is, unless you’re considering changing the shape of the rotor… into a changing shape. A new configuration of a rotary engine – the Szorenyi rotary engine – has been developed by the Melbourne-based Rotary Engine Development Agency (REDA). While the stator, or stationary part of the Szorenyi engine is similar to that of a Wankel engine, the geometric shape of the engine rotor is a rhombus, which deforms as it rotates inside the contour of the stator. Szorenyi rotary engine cycle This geometry translates to a rotary engine with four combustion chambers as opposed to a traditional Wankel rotary’s three. Each revolution of the crankshaft produces one revolution of the rotor and a complete engine cycle in each of the four chambers: or four power strokes. In contrast, the Wankel engine produces one power str...

The NSU Ro80 is an advanced passenger sedan released in the 1960s that would ultimately kill the company that developed it and result in the founding of a company we all know today as Audi. With a front-mounted twin rotor Wankel engine, a semi-automatic three speed transmission, four wheel independent suspension, four wheel disc brakes, power steering, and excellent aerodynamics, the NSU Ro80 was intended to be a car of the future – but reliability problems with the rotary engine would lead to its demise. Fast Facts – The NSU Ro80 • In the 1950s NSU was one of the largest motorcycle manufacturers in the world, they released the world’s first Wankel rotary-engined car, the NSU Spider or “Wankelspider,” in 1964 followed by the rotary engined NSU Ro80 in 1967. • NSU were world leaders in Wankel rotary engine technology, selling patent licenses to many of the world’s leading automobile (and some motorcycle) companies – most notably Mazda and Norton. • In the 1960s many believed that the Wankel rotary engine was the engine of the future, countless millions were spent refining the design however problems with apex seals, high emissions, and poor fuel economy have dogged the design for decades. • The NSR Ro80 is powered by a twin rotor Wankel engine with a displacement of 995cc and 113 bhp at 6,500 rpm and 101 ft lbs of torque at 3,000 rpm. The top speed was 180 km/h (112 mph) and the car had an excellent drag coefficient for the era – just 0.355 Cd. Developing The NSU Ro80 The e...

Related Story • How Rotary Engines Work, And Why They're Dead Now But there are major drawbacks. A Wankel engine doesn't burn fuel nearly as cleanly or efficiently as a piston engine. That leads to dirty emissions—a problem that's compounded by the way the engine burns its lubricating oil. The technical challenges of the rotary engine eventually led every major automaker except Mazda to abandon the design. Even now, Mazda doesn't currently build a rotary-powered vehicle, but we've been Related Story • Here's How Hydrogen Engines Actually Work Here's the interesting thing: Most of the Wankel's drawbacks turn into advantages with one simple change. All you have to do is swap fuels, from gasoline to hydrogen. Beloved YouTube nerd Jason Fenske of Engineering Explained is here to describe for us exactly what happens inside a Wankel engine that's running on hydrogen, Fenske uses an incredibly cool 3D-printed cutaway engine to explain exactly why the rotary is so good at burning hydrogen, and how future vehicles might take advantage of this benefit. Check out the full video here.

Wankel Aviation focuses on hybrid propulsion systems for electrically powered drones and light aircraft. Core components of these hybrid propulsion systems are: • the Wankel SuperTec rotary engines • matching generators driven by the rotary engine, generating electricity and serving as starters for the engine • power electronics • a buffer battery that provides power for starting the system and for peak demands • an electronic control system • electric motors to power the aircraft. Hybrid propulsion systems allow for smaller internal combustion engines than direct drive systems. The internal combustion engines in hybrid systems can be operated close to their design point, providing unmatched fuel efficiency. In addition, an electric hybrid system supports optimal matching of efficiency between the engine and propeller. We began developing hydrogen-powered engines in 2018, commissioned the first such engine in 2019, and have been further optimizing it ever since. However, the use of hydrogen in aviation raises challenging questions about the safety of the overall system on board the aircraft. Certification requirements must be considered early in the aircraft development process to ensure the aircraft receives EASA or FAA certification. We can assist you in developing certifiable hydrogen propulsion systems for later integration into the aircraft. We would be very pleased to assist you in making your aircraft safe with hydrogen.