walton aero propulsion ppt
TRANSCRIPT
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Propulsion
Reuben, Garrick, Collin
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Piston Engine
• Standard Engine used in small aircraft
• Piston torque and horsepower are decided by bore and stroke
• Generally powers a propeller• Can be found in most
transportation vehicles• Supercharges and Turbos can
be added to increase power output
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Radial Engine
• A radial engine has 1 or more rows of cylinders arranged in a circle around the crankcase.
• Every row must have an odd number of cylinders, in order to operate smoothly.
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Ethanol Power• The incorporation of Ethanol into the
production of airplane engines is a big breakthrough in the fight for supporting nature and reducing the amount of fossil fuels used in everyday flying.
• Fagen Inc. has taken Ethanol to a new level. It is now used for high performance stunts in air shows, instead of having low HP.
• For Example: The Ethanol-Powered Fagen MX2 has a whopping 400+ HP and top speed of 275 mph.
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Wankle Engine
• Internal Combustion engine; uses a rotary design
• 4 Stroke Cycle• Developed in the 1950’s and
only recently was perfected by Mazda
• Simpler, Lighter, and have less moving parts than piston powered engines of the same power output
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Electric Engine
• Uses updraft from the props to store energy
• Able to use solar power to help fly
• Some have a battery for takeoff. After takeoff, it runs completely on solar power.
• Generally glider shaped, for maximum lift with minimum power
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Motorjet
• Very inefficient design for an aircraft engine
• Drives a compressor which fires into the jet engine
• Very fuel inefficient and produces less or equal power as a conventional jet engine
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Pulse Jet Engine
• Low fuel economy, however, cheap and easy to build.• Not very fast • Pulse jet diagram: First part of the cycle: air flows
through the intake (1), and mixed with fuel (2). Second part: the valve (3) is closed and the ignited fuel-air mix (4) propels the craft.
• Used in a few German planes
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Hyper Engine • BMW 803 – one of the
most powerful attempts at a hyper engine.
• 28-Cylinders, 3950 Horsepower
• Crankshaft was too weak, so they used direct connected props.
• HP/LB ratio is about 0.6
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Nuclear Engine
• Uses direct cycle jet engines powered by a nuclear reactor
• Soviets were putting in great effort into developing the engine
• Very unsafe, however very powerful if successful