Propeller Design | AbstractHow does a helicopter generate enough lift to fly? How does a speedboat get moving fast enough to pull someone on water skis? Here ’s a project on designing propellers to do the job. ObjectiveThe goal of this project is to investigate how changes in chord length affect the efficiency of propellers.IntroductionA propeller‚ like an airplane wing‚ is an airfoil: a curved surface that can generate lift when air moves over it. When air moves over the surface of a moving propeller
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ELECTRIC SCISSOR JACK 12 VOLT - 2 TONS CAPACITY Model 94491 OPERATING INSTRUCTIONS Due to continuing improvements‚ actual product may differ slightly from the product described herein. ® 3491 Mission Oaks Blvd.‚ Camarillo‚ CA 93011 Visit our Web site at: http://www.harborfreight.com TO PREVENT SERIOUS INJURY‚ READ AND UNDERSTAND ALL WARNINGS AND INSTRUCTIONS BEFORE USE. Copyright ©2006 by Harbor Freight Tools®. All rights reserved. No portion of this
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3-Aerofoil Lab Report Introduction This report aims to investigate the effect the angle of attack of an aerofoil has on the air flow around it. This was done by recording the lift and drag forces the aerofoil experienced when positioned at different angles of attack. The experimental lift force the aerofoil experienced when positioned at different angles of attack was then compared with theoretical values. An attempt was made to explain any discrepancies between experimental and
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as tennis‚ soccer‚ hunting‚ and motor sports‚ we will investigate the effects of aerodynamics on baseball. The three main forces that act on a baseball in flight are the weight‚ drag‚ and lift. In an effort to understand how a baseball changes direction we will discuss an additional force called the lift coefficient or Magnus Force. This force is developed by the rotation or spinning of the baseball. We will discuss several different pitches and how the Magnus force acts on each of the pitches
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propeller. Nowadays huge turbofans are attached to the wings or the tail of the aircraft instead. Of course propelled airplanes are still used‚ most modern planes have jet engines. I will be going over the physics of propellers‚ and how airplanes gain lift. Lastly‚ I will go over the details and aspects of jet turbofans used on commercial airlines. A propellers main function is to push the plane forward through the air. Hence it needs all the air that it can get. Since air becomes scarcer as we go
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Semester 2009 Contents Abstract Acknowledgements 1 Introduction 2 Review 2.1 Aerodynamics of flapping wings . 2.1.1 Wagner Effect . . . . . . . 2.1.2 Leading edge vortex . . . 2.1.3 Clap and fling mechanism 2.1.4 Rotational lift . . . . . . . 2.1.5 Wing-wake interactions . 2.1.6 Lift force . . . . . . . . . 2.2 Flapping wings in nature . . . . 2.2.1 Insects . . . . . . . . . . . 2.2.2 Hummingbirds . . . . . . 2.2.3 Bats . . . . . . . . . . . . 2.2.4 Birds . . . . . . . . . . . . 2.3 Summary . . . .
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Ergonomics – is a study of people and the interaction with the environment in which they work. Studying ergonomics helps to improve an environment so that people can work in comfort using the smallest amount of energy. This is achieved using measurements of movement or space (e.g. Arm length or arm swing) Two important aspects of ergonomics are anthropometrics an anatomy and movement. Taking these into account when designing should help to produce items‚ which are easy to use‚ easy to operate
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Introduction First racing cars were primarily designed to achieve high top speeds and the main goal was to minimize the air drag. But at high speeds‚ cars developed lift forces‚ which affected their stability. In order to improve their stability and handling‚ engineers mounted inverted wings profiles1 generating negative lift. First such cars were Opel’s rocket powered RAK1 and RAK2 in 1928. However‚ in Formula‚ wings were not used for another 30 years. Racing in this era 1930’s to 1960’s occured
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Figure 1 below shows the change in magnitude of the steady state acceleration with time. This graph complies with Newton’s second law as the force applied is equal to 1 and the mass remains constant so and an acceleration of one is expected. I also tested this by changing the value of the force applied‚ to a value of 2‚ which in theory should give and equivalent change in the acceleration‚ to a value of 2. From Newton’s second law: it can be seen that as the force varies‚ provided moment of inertia
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an object must have "lift." Lift is what pushes something up. Lift is made by wings. Wings have a curved shape on top and are flatter on the bottom. That shape makes air flow over the top faster than under the bottom. The faster air on top of the wing makes suction on the top of the wing and the wing moves up. Airplanes get lift from their wings. A helicopter’s rotor blades are spinning wings. A helicopter moves air over its rotor by spinning the blades. The rotor makes the lift that carries the helicopter
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