EASA : Module17 Propeller Question - Answer On which type of turbo-propeller would you expect to find a parking brake a) compounded twin spool b) free turbine c) direct coupled twin spool Ans:b * Propeller blade angle a) increases from root to tip b) decreases from root to tip c) is constant along the blade length Ans:b * The purpose of the pitch change cams is to a) convert linear motion to rotary motion. b) convert rotary motion to linear motion. c) prevent windmilling Ans:a * What does the torque meter reading indicate in a gas turbine engine? a) Torque reaction at the reduction gear b) Engine torque c) The ratio between engine thrust and engine torque Ans:a * The gear type pump in a C.S.U. or P.C.U a) lubricates the entire propeller system b) boosts engine oil system pressure c) assist the governor valve to move Ans:b * The gear segments on the blade roots of a hydromatic propeller mesh with the a) stationary cam b) torque tubes and eye bolts c) movin
Do you know what adverse yaw is and how to solve it? To understand what adverse yaw is, we need to first explain the axes of motion for an airplane. An aircraft in flight can rotate around three different axes, as illustrated below. Aircraft control surfaces However, the effect of one control surface is not always limited to just pitch, roll, or yaw alone. When the deflection of one control surface affects more than one of these orientations, we say that the orientations are coupled. The most important of these coupled interactions is adverse yaw. To better understand the concept, let's study a picture of what happens when the pilot deflects the ailerons to roll the aircraft. As you can see, the aircraft rolls because one aileron is deflected downward while the other is deflected upward. Lift increases on the wing with the downward-deflected aileron because the deflection effectively increases the camber of that portion of the wing. Conversely, lift decreases on the wing with
You might have some question like.... How can a jet engine work when it rains or snows? Wouldn't the water put out the flame inside? How is water removed from a jet engine in rainy conditions? Does rain or snow ingestion affect the efficiency of a jet engine? Answers are here... As we know a jet engine works by compressing incoming air, mixing it with fuel, igniting that mixture, and exhausting the high-pressure gases to produce thrust. The initial compression is accomplished through a series of rotating blades called compressors. After jet fuel is added through a fuel injection system, the mixture is burned in a combustion chamber. The exhaust moves through another series of rotating blades called the turbine that powers the engine and finally through a nozzle. Simple Jet Engine The biggest danger posed by forms of precipitation like rain, snow, ice, or fog is an engine flame-out. A flame-out is defined as a loss of engine power that is not caused by a mechanical failure. The
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