Since it was tradition to start the right engine first, they choose the left wing tank for this. So the APU starts to use some fuel from the left and then when the right engine is started first, it will help to partially balance the fuel.
How do pilots start jet engines?
Gas turbine engines come in many shapes and sizes. The electric motor spins the main shaft until there is enough air blowing through the compressor and the combustion chamber to light the engine. … Fuel starts flowing and an igniter similar to a spark plug ignites the fuel.
Do you know why Eng 2 is always start first on a320?
Engine #2 is started first because the eng #2 pressurizes yellow hydraulic system which the parking brake and the alternate braking is fed.
Why do pilots keep their engines running?
A: As a jet descends toward the runway, the pilot increases the power to maintain a specific descent rate (usually around 700 feet per minute). Jet engines require time to accelerate, so the increase in thrust (known as spooling up) improves the ability to go around should it be necessary.
Do jet engines need to warm up?
They require warming up the engines in stages which involves several increases in power corresponding to increases in temperatures until such time as take-off power can be accepted by the engine without turbine or shaft failure. The procedure usually takes 10 to 15 minutes an a cold day.
Why do pilots always start engine 2 first?
Engine number 2 is started first because it’s on the opposite side of the air bridge. When starting with external air or power it is normal to start Engine number 1 because it is further away from the carts.
Do pilots use one engine taxi?
The use of one-engine-out taxi techniques is on the rise as one means to reduce fuel burn. … In the case of four-engine aircraft, the pilot shuts down two engines immediately after exiting the runway, saving large amounts of fuel. The technique has been adopted in airlines ranging from Iberia Airlines to Air Qatar.
Does the APU run during flight?
It’s pilot-proof! Crews normally run the APU before flight for electrical power, air conditioning and engine start. After landing, the APU is started so engines can be shut down as soon as the aircraft arrives at the gate. If the APU is needed during flight, it can be started in about a minute.
Do planes turn off engines when landing?
No, the engine is not shut down. The power is reduced to idle or to a lower setting (if doing power on touch downs). This power reduction should be done only when you are trying to flare for the landing, that is pulling back on the stick to touch the main wheels first.
Can plane fly without APU?
Without an APU an aircraft would depend on GSE only for starting one engine with pressurized ground supplied air. Aircraft are allowed in general to fly without an APU. Exceptions are flights with two-engined aircraft and long routes over water or terrain without an alternate airport – so called ETOPS flights.
Do you need a key to start a plane?
Small planes (like the little Cessna in How Airplanes Work) have locks on the doors and ignition keys inside to start the engine. … Commercial jets, on the other hand, have no locks on the doors and no ignition key of any sort. You can hop in, flip a couple of switches and start one up!
Why did they say contact when starting a plane?
After the propeller is pulled through several revolutions, the crewmember would pause and indicate the engine was ready to start. The pilot would respond by shouting “contact” as he switched the magneto switch to both and moved the mixture to full rich.