Selecting the wood, cutting the layers glueing them and shaping of the airscrew is shown. |
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A helicopter rotor operates in several different states and speeds, and therefore might by the most complicated airscrew of all. |
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During the latter part of the 15th century, Leonardo da Vinci made drawings of a helicopter that used a spiral airscrew to obtain lift. |
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However, for shallow water there are such variations as the paddle wheel, airscrew, and water jet pump. |
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In Great Britain the propeller of an airplane or the rotor of a helicopter is commonly called an airscrew. |
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The 130 cm Helix airscrew with its high angle of attack blades can be rev up easily by the powerful engine, there is a great amount of thrust. |
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If the wind doesn't blow, the propeller can be connected to a generator and a battery, for catching the energy produced while the airscrew is running and release it when it's necessary. |
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Airscrew performance depends on the wind speed as well as the rotational speed. |
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