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Subject: насадки воздушных винтов Пожалуйста, помогите перевести.Выражение встречается в следующем контексте: Заранее спасибо |
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A ducted fan is a propulsion arrangement whereby a propeller is mounted within a cylindrical shroud or duct. The duct prevents losses in thrust from the tips of the propeller and, if the duct has an airfoil cross-section, it can provide additional thrust of its own. Ducted fan propulsion is used in aircraft, airboats and hovercraft. A kind of ducted fan, known as a fantail or by the trademark name Fenestron, is also used to replace tail rotors on helicopters. In aircraft applications, ducted fans normally have more and shorter blades than propellers and thus can operate at higher rotational speeds. The operating speed of an unshrouded propeller is limited since tip speeds approach the sound barrier at lower speeds than an equivalent ducted propeller. The higher rotational speed of a ducted fan may require a gearbox when used with piston engines, which adds weight and negates some of the advantages. Instead, electric or Wankel rotary engines are the preferred method of power, and efficient home-made examples exist for both. A turbine can also be used to power the fan; in this configuration the ducted fan is referred to as a turbofan. Ducted fans usually have an odd number of blades to prevent resonance in the duct.
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| Оно? |
| Спасибо! Но к сожаленью не то. У меня текст про ховеркрафты, не про самолеты. И там какие-то насадки непонятные. |
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Я БАЛДЕЮ Ю ПРЕДЛАГАЮ ПЕРЕЧИТАТЬ ЕЩЕ РАЗ A ducted fan is a propulsion arrangement whereby a propeller is mounted within a cylindrical shroud or duct. The duct prevents losses in thrust from the tips of the propeller and, if the duct has an airfoil cross-section, it can provide additional thrust of its own. Ducted fan propulsion is used in aircraft, airboats and hovercraft.A kind of ducted fan, known as a fantail or by the trademark name Fenestron, is also used to replace tail rotors on helicopters. In aircraft applications, ducted fans normally have more and shorter blades than propellers and thus can operate at higher rotational speeds. The operating speed of an unshrouded propeller is limited since tip speeds approach the sound barrier at lower speeds than an equivalent ducted propeller. The higher rotational speed of a ducted fan may require a gearbox when used with piston engines, which adds weight and negates some of the advantages. Instead, electric or Wankel rotary engines are the preferred method of power, and efficient home-made examples exist for both. A turbine can also be used to power the fan; in this configuration the ducted fan is referred to as a turbofan. Ducted fans usually have an odd number of blades to prevent resonance in the duct. |
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Для тех кто в танке, понимаю, текст все равно чего скажет, повторяю на пальцАх..... То бишь не норд-норд-вест, а рукой показываю :0)))))
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| Не могу удержаться и не спросить: "У вас волосы случайно не цвета спелой пшеничной соломы? " :0))) |
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Какая вам разница какого цвета мои волосы?! А в тексте мне некогда было тогда каждую букву разглядывать. Теперь я могу спокойно прочитать его. Спасибо еще раз! П.С. А волосы мои кстати именно такого цвета. Откуда догадались ? :-D |
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Пожалуйста! Рад был помочь. зы: Мне, как и многим, просто нравятся блондинки! :0) |
| а я и не блондинка, если что! :-) |
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А как же тогда переводиться blonde с французского, если не "цвета спелой соломы"? :0) |
| ну у блондинок же белые волосы , а у меня золотисто-русые. Вот так :)) |
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