Engines and Motors Part - 2. Engines and Motors Turbines Rocket Steam.

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Presentation transcript:

Engines and Motors Part - 2

Engines and Motors Turbines Rocket Steam

Turbine Engines In all cases, something (a force) spins the turbine. Background Steam Water Wind

Gas Turbine / Jet Engines In a gas turbine a pressurized gas spins the turbine.

Gas Turbine / Jet Engines The engine produces its own pressurized gas, and it does this by burning something like propane, natural gas, kerosene or jet fuel. The heat that comes from burning the fuel rapidly expands the exhaust gasses, and the high-speed rush of this hot air spins the turbine. Helicopter Engine Helicopter Engine

Gas Turbine / Jet Engines Advantages: Excellent Power to Weight Ratio Small Size Disadvantages: EXPENSIVE! Prefer a constant load

External Combustion Engines Steam Engines Rocket Engines

Steam Engines Steam engines were the first engine type to see widespread use. Thomas Newcomen in 1705 Used to pump water from coal mines along sea shore

Steam Engines Steam engines powered all early locomotives, steam boats and factories, and therefore acted as the foundation of the industrial revolution.

Steam Engines

Rocket Engines Rocket engines are reaction engines. The "strength" of a rocket engine is called its thrust. Thrust is measured in "pounds of thrust"

Rocket Engines – 2 Types Solid Fuel Liquid Fuel

Rocket Engines-Solid Fuel Solid-fuel rocket - first engines created by man. Invented in China around 1232

Rocket Engines – Solid Fuel Solid-fuel rocket engines have three important advantages: Simplicity Low Cost Safety They also have two disadvantages: Thrust cannot be controlled Once ignited, the engine cannot be stopped or restarted

Rocket Engines- Liquid Propellant Rockets Robert Goddard-1926 He also worked on and solved a number of fundamental problems in rocket engine design, including pumping mechanisms, cooling strategies and steering arrangements.

Rocket Engines- Liquid Propellant Rockets Advantages: Shut Down/Restart Can Throttle Higher Performance Disadvantages: Very Complex Very Expensive

Electric Motors 1 st practical electric motors from Emily and Thomas Davenport in RMP, and powered machine tools and a printing press

Electric Motors Electric Motors: D/C A/C

Electric Motors

Electric Motor in Action Electric Motor in Action

Hybrids Any vehicle is hybrid when it combines two or more sources of power. Examples: mo-ped, car, locomotive, sail boat

Hybrids Hybrid Cars Electric Drag Racing

The End