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In normal operation, the Outflow Valve does not generally completely close except maybe for system self test or validation test. It maintains some flow so as to achieve ventilation of the cabin. The basic system of operation of outflow valves is to restrict the airflow through the valve so as to maintain an 'artificially' higher pressure of air in the ...


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If you're selecting increasing cabin altitude, you are lowering cabin pressure. To do that you have to let some air out of the balloon (the pressure hull). So the valve has to be opened more (they usually never fully close because there is always more inflow than needed to maintain cabin pressure with both engines running - how much open depending on how ...


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It refers to the valve controlled by the guarded RAM AIR pushbutton referred to as "emergency RAM air" in the system diagram. When the triangles (think of them as arrows indicating flow) are white the triangles indicate sufficient flow of air for conditioning/pressurisation. The normal position of the guarded Ram Air pushbutton is 'off', ie no ...


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There are a lot of factors that affect the fuel consumption. To answer your question, we have to make some assumptions. Cruise altitude = 35000 ft. Aircraft flown at LRC (Long range cruise speed). Air conditioning normal flow. Anti icing off. In the A320 FCOM there are tables which shows fuel burn and distances covered from brake released to the landing. ...


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In older A320s, the alternate braking system unlike the normal braking is not computer controlled. The alternate braking is controlled by auxiliary LP pressure distribution lines and is entirely mechanical. When you press the brakes with normal braking unavailable, pressure is sent by the hydraulic lines which closes off the automatic selector valve and ...


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Pneumatic operated: actuation by using air pressure. By opening a valve, high pressure air enters a cylinder, causing a piston to be pushed out. Typically, actuators of this type have two valves connected to two separate chambers, allowing for movement both ways. The valves need opening and closing, though. This is what the "electrically controlled"...


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Airplanes are designed with less lateral stability when compared to longitudinal stability and directional stability. This means, they are very nimble and easy to control in the roll axis. If you have flown any aircraft you will realise that it is way easier to roll an aircraft than pitch it up and down. A longitudinally unstable aircraft can easily go out ...


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The normal flight law behaves as if it auto-trims the aileron, but there is no actual trim involved. The computer simply derives the desired deflection of ailerons using the pilot input and feedback from the inertial reference system. So In normal law (which requires working inertial reference) neutral side-stick means maintain bank angle, so effectively ...


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There is no need for aileron trim because the flight control system keeps the bank angle constant if there is no lateral input on the side stick. The pilots use the side stick to roll the aircraft to the desired bank angle and then hold the stick neutral. The FCS will then maintain that bank angle by giving the right amount of aileron input. The exception is ...


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Basically during RAT extension blue hydraulic system is not powered which operates blue ACTR of elevator which is controlled by ELAC#1. To avoid control confusion ELAC#2 straight away given as no go to give pitch control during this transit RAT extension phase.


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Three start attempts are considered one "CYCLE" (we talk this in terms of starting the engine, that engine will get started in atleast these attempts). A gap of 20sec or 35 sec after each attempt (failed /successful) is required. And the cooling period of 15 min after 1 COMPLETE CYCLE (or 4 failed attempts) is required. hope this helps.


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All high bypass jet engines make this roaring noise due to the blade tips of the first N1 stage (The first fan blades you can see from your seat). At take off this noise is generated by the blades tips which are rotating at 75-95% of maximum power, nearing or exceeding the speed of sound. This creates a MILD continuous sonic shock waves (supersonic bang) ...


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