20-03-2012, 03:41 PM
AIRCRAFT ENGINES-NEW TYPES
AIRCRAFT ENGINES-NEW TYPES.pptx (Size: 1.55 MB / Downloads: 76)
WANKEL ENGINE
It is commonly called a rotary engine
It is a type of internal combustion engine using an eccentric rotary design to convert pressure into a rotating motion instead of using reciprocating pistons.
Its four-stroke cycle takes place in a space between the inside of an oval-like epitrochoid-shaped housing and a rotor that is similar in shape to a Reuleaux triangle but with sides that are somewhat flatter.
The engine was invented by German engineer Felix Wankel. He received his first patent for the engine in 1929, began development in the early 1950s,completing a working prototype in 1957.
ADVANTAGES!
Wankel engines are considerably lighter, simpler, and contain far fewer moving parts than piston engines of equivalent power output.
They have no valves or complex valve trains; In addition, since the rotor rides directly on a large bearing on the output shaft, there are no connecting rods and there is no crankshaft.gives the Wankel engine high reliability, a smoother flow of power, and a high power-to-weight ratio.
The Wankel engine is constructed with an iron rotor within a housing made of aluminium, which has a greater coefficient of thermal expansion.
This ensures that even a severely overheated Wankel engine cannot seize, as would be likely to occur in an overheated piston engine. This is a substantial safety benefit of use in aircraft.