How does a turboprop work?

Answer 1

A simple turbine.

Air is drawn into the engine continuously and compressed by a series of rotating blades. Fuel is sprayed into the combustion chamber and burnt increasing the gas temperature to around 1200C.

The hot high pressure gas expands through a second set of blades mounted on the same shaft as the compressor blades. The energy of the gas is partially expended powering the compressor, but has a residual energy which is either expended as a hot jet (resulting in thrust) or which drives a further independent set of blades to power a propeller or other device.

see http://www.rolls-royce.com/education/schools/how_things_work/journey02/index.html

Answer 2

Turbo-prop engines are a variety of aircraft turbine engines. There are three types of aircraft turbine engines, turbo-prop, turbo-jet and turbo-fan. In turbine engines, heated air from combusting fuel turn the turbine blades that turn a shaft. The shaft drives the compressor section of the engine that supplies pressurized air to the combustion section. In turbo-prop engines the turbine shaft is also attached to a propeller that propels the aircraft. In a turbo-jet engine, used for high speed aircraft like military jets, all the propulsion comes from the heated gas or jet that exits the engine. In a turo-fan most of the propulsion comes from air that comes from the large fan in front of the compressor section that also mixes with the hotter air that exits from the turbine engine. In general a turbo-prop, is the most efficient and a turbo-jet is the least efficient and a turbo-fan is in the middle. A high bypass turbo-fan, as used on all modern civillian transport jets, has a very high efficiency compared to earlier turbo-fan engines. The high bypass refers to the amount of air that bypasses the combustion and turbine sections of the engine. In general turbo-jet engines are capable of the highest speeds, up to several mach numbers (mach 1 is the speed of sound, over 700mph), while turbo-props have the lowest speeds. Turbo-fans have maximum speeds of below Mach 1, usually cruising at 500-600mph. Turbo-shaft engines transfer all the propulsion to the shaft and are used for propelling tanks or helicoptor rotors. A mixed use of a turbine engine is the Short Take-off and Vertical Landng, or Marine/Army, version of the Joint Strike Fighter. In that craft the single turbine engine supplies traditional Turbo-jet propolsion of the aircaft in horizontal flight, but can convert to vertical take off and landings by engaging a lift fan in the fuselage clutched to the turbine shaft.

Answer 3

There are two kinds of turboprops--single shaft and free turbine.

A single shaft engine is made out of a jet engine. At the end of the engine's shaft, there's a gearbox. The prop is connected to the output of the gearbox. The problem with this arrangement is, if something hits the prop it damages the engine.

A free turbine engine is also made out of a jet engine, but there's a fan at the end of the engine's shaft. A few inches away from that fan is ANOTHER fan. The first fan's breeze spins the second fan, which is bolted to the propeller. This costs you some horsepower, but there are two advantages: it's easier to start the engine because there's less load on it, and if you get a prop strike (either by a bird or by landing the plane wrong) you won't hurt the engine, just the prop.

Fun fact: the most popular turboprop is the Pratt & Whitney PT6. It's installed in the plane so the inlet--the "front" of the engine--is pointing at the back of the airplane.

Answer 4

go to YouTube.com and search for it.with an animation,sure you will understand.

Answer 5

mainly a jet-engine with a propeller and they use less fuel