Physics research helicopters - 1583 Words

Controlled Assessment – Helicopters You need to research information (using the internet) that includes answers for the following questions: 1. How the turning rotor makes a helicopter move upwards 2. How the rotor is made to turn in a helicopter and in an autogyro 3. How autorotation is used to help land a helicopter safely if the engine fails 4. Why a helicopter; falling during autorotation, could reach a terminal speed without the pilot changing any controls 5. The effect of the weight of the helicopter on terminal speed Over the summer you need to carry out your research in preparation for the controlled assessment you will be completing it for Physics in September. You must make sure that you include: Relevant information†¦show more content†¦What is autorotation? Autorotation is a condition where the main rotor is allowed to spin faster than the engine driving it. How is that achieved? It is actually quite simple. All helicopters are fitted with a free wheeling unit between the engine and the main rotor, usually in the transmission. This free wheeling unit can come in different forms but one of the most popular is the sprag clutch. The free wheeling unit will allow the engine to drive the rotors but not allow the rotors to turn the engine. When the engine/s fail the main rotor will still have a considerable amount of inertia and will still want to turn under its own force and through the aerodynamic force of the air through which it is flying. The free wheeling unit is designed in such a way to allow the main rotor to now rotate of its own free will regardless of engine speed. This principle is the same reason that if you are in your car and you push your clutch in, or put it into neutral while the car is still moving, the car will coast along under its own force. This occurs regardless of what you do to the accelerator pedal. Controlled Descent ? The next question you are probably asking yourself is: Does the pilot retain control of the helicopter? The answer is yes. The pilot will still have complete control of his descent and his flight controls. The majority of helicopters areShow MoreRelatedHelicopter Experiment3413 Words   |  14 PagesKaran Madan IB Physics SL Sam Edgecombe 2012.04.22 D, DCP, CE Paper Helicopter Experiment Introduction: The paper helicopter experiment involves designing a paper helicopter and by changing a certain variable acquire data for a selected variable. The essential part in this practical is to plan the experiment in detail in order to obtain substantial data. Firstly we have to identify our controlled variables which will be kept constant throughout the experiment. By carrying out this practical itRead MoreFuture Of Sensors : A Study Conducted By Intechno Consulting969 Words   |  4 Pagesimportance of sensors. 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