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Home ::  Articles ::  Related Articles ::  The Difference between Gas Turbine Engine and Gasoline Engine

The Difference between Gas Turbine Engine and Gasoline Engine

There are a number of different types of engines in the market, such as glow engine, gas turbine engine and gasoline engine. As we know, all of them are internal combustion engines. In this post, we will learn about the difference between gas turbine engine and gasoline engine. (Also read the Comparing RC Gas Engines with Glow Engines)

Introduction
Gas turbine engine has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber in-between. In a gas turbine, a pressurized gas spins the turbine. It use rotating compressors to compress air, and then mix it with fuel and burn the mixture to produce hot exhaust gases that drive turbines. However, gasoline engine or petrol engine, is working petrol (gasoline) and similar volatile fuels. And in most of engines, the fuel and air are usually pre-mixed before compression.

Engine Types
There are various types of gas turbines, include Jet engines, turboprop engines, turbojet and turbofan engines and more. But we sometimes call gas turbine engine a jet engine. All of them supply thrust directly by accelerating air and/or exhaust gases rearward.

The classification of gasoline engine is based on number of stokes per cycle: two stroke and four stroke engine. Two-stroke engine ignites fuel at every upward stroke, so there are two strokes for every ignition of fuel. The working of internal combustion is divided into four stages called four strokes of the engine.

Application
Turbine engines come in a wide variety of shapes and sizes because of the many different aircraft missions. They are used in all kinds of un­expected places. For example, turboprop aircraft, helicopters, ships, armored vehicles and even for electrical power generation.

Similarly, gasoline engines have many applications; they are most commonly used for motor cars, motorcycles, small trucks and buses, general aviation aircraft, outboard and small inboard marine units, moderate-sized stationary pumping, lighting plants, machine tools, and power tools.

Performance
Gas turbine engines have a great power-to-weight ratio; they are smaller than their reciprocating counterparts of the same power. That is, the amount of power you get out of the engine compared to the weight of the engine itself is very good.

However the flexibility, smoothness, instant power and broader rev range make the gasoline engine better for general flying. And the instant power of the petrol engine allows maximum momentum to be gained in a very short distance. Factors such as lower initial cost and faster warm up times, coupled with a higher power-to-weight ratio also means that gasoline engines are better suited to shorter stop-start flying conditions.

Disadvantage
But inevitably it has not always got everything right - gas turbine engines are expensive when compared to gas engines of the same size. They are high-demanding in designing and manufacturing as they spin at high speeds and operate high temperatures. In additional, they require more fuel even in idle state.

The big problem of gasoline engine is pollution. Burning 100L of petrol emits about 250kg of carbon dioxide into the atmosphere.