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# Helicopters

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### Helicopters

1. 1. Helicopters By Ricky ToronisPicture from www.military-today.comhelicopterskamov_ka50_hokum.htm
2. 2. Introduction to flight• The four main forces in flight are; weight, lift, thrust, and drag LiftThrust Drag Weight
3. 3. The secret to helicopters flying• Helicopters fly because of the unique design of their blades
4. 4. The aerofoilhttp://www.aerospace-technology.com/projects/ab139/images/1-aw139-helicopter.jpg Picture from: http://www.choppertheory.zoomsh are.com/my_images/aerofoil.gif
5. 5. How Bernoulli has influenced the aerofoilBernoulli discovered that the windon the top the aerofoil travels fasterthan the air on the bottom Picture from: https://faasafety.gov/files/gslac/FTB/Helicopte r%20Aerodynamics/Fig2-2.JPG
6. 6. However• Bernoulli was not entirely correct Picture from: https://faasafety.gov/files/gslac/FTB/Helicopte r%20Aerodynamics/Fig2-2.JPG
7. 7. How Newton has influenced the aerofoilBased on Newtonsthird law; everyaction has an equaland oppositereaction. The aerofoilcreates a downwardwind (downwash),which causes the Picture form:aerofoil to lift http://4.bp.blogspot.com/- M3cWlKTcni0/TZov_cTwi4I/AAAAAAAAABY/8xx VrH-JshQ/s1600/airfoil.jpg
8. 8. Its blade spin until they getfast enough, creating How a helicopterenough downwards wind takes offto overpower the weightforce. Picture from: http://science.howstuffwor ks.com/transport/flight/mo dern/helicopter.htm
9. 9. What is the tail rotor of a helicopter for? The tail rotor helps keep the helicopter straight Picture from: http://sci ence.ho wstuffwo rks.com/t ransport/ flight/mo dern/heli copter.hthttp://www.jascman.com/tail- mrotor/ ^
10. 10. How a helicopter moves around A helicopter moves around by tilting its whole bodyPicture from:http://science.howstuffworks.com/transport/flight/modern/helicopter.htm
11. 11. Bibliography• http://www.boeing.com/companyoffices/abo utus/wonder_of_flight/how_things.html• http://www.minihelicopter.net/howdohelicop tersfly/index.htm• http://science.howstuffworks.com/transport/f light/modern/helicopter.htm• http://www.helis.com/howflies/• http://en.wikipedia.org/wiki/Helicopter