What is RAT?

What is RAT?
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1 Answer

Answer :

RAT or Ram Air Turbine is a small unit having  to small aerofoil shaped blade installed in it.  When it is deployed to the incoming airstream,  the blades rotate at high speed providing  emergency drive for the blue hydraulic system  pressure pump.
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Related questions

What are the conditions that deploys the RAT?

Description : What are the conditions that deploys the RAT?

Last Answer : RAT is automatically deployed if it senses a. Both hydraulic system EDPs failed and loss of pressure b. Failure of both AC bus 1 and 2. c. Aircraft speed is above 100 knots.

How RAT provides hydraulic and electrical power? What is the electrical supply from CSMG?

Description : How RAT provides hydraulic and electrical power? What is the electrical supply from CSMG?

Last Answer : As RAT is deployed, its blades rotates at a high speed. The shaft is connected to a driving part of blue hydraulic system emergency pressure pump. Thus the blue hydraulic system is pressurized and ... the aircraft the emergency electrical supply of 115 V 400 Hz AC supply of 5 kVA rating.

What are the systems powered by RAT?

Description : What are the systems powered by RAT?

Last Answer : RAT powers the blue hydraulic system and provides basic electrical power through Constant Speed Motor/Generator (CSM/G).

Tell me about IDG? Or How the IDG functions?

Description : Tell me about IDG? Or How the IDG functions?

Last Answer : IDG or Integrated Drive Generator is an AC generator integrated with a Constant Speed Drive or CSD. The CSD is driven by the Accessory Gear Box (AGB) which is in turn driven by the engine. Since engine speed varies

What is the range of fuelling?

Description : What is the range of fuelling?

Last Answer : A circular area of 6 meter radius from the fuelling point or fuelling nozzle is termed as the range of fuelling.

What is LRU? Mention some of the LRUs in engine and airframe?

Description : What is LRU? Mention some of the LRUs in engine and airframe?

Last Answer : LRU or Line Replaceable Unit is a complex unit of the aircraft which can be quickly and easily removed while the aircraft is at bay or ramp area. It is a sealed unit designed for quick ... Valve. Some of the LRUs in airframe are all communication and navigation antennas, black box etc.

What is flap asymmetry? What will be the action should there is a flap asymmetry?

Description : What is flap asymmetry? What will be the action should there is a flap asymmetry?

Last Answer : If flaps of left and right wing are moving at different speed or the inboard and outboard flap of the same wing are moving a different speeds, then one flap will travel to a higher ... take-off thrust. The full authority type EEC is called FADEC or Full Authority Digital Electronic Control.

What are the meanings of different colours of the annunciator lights in cockpit?

Description : What are the meanings of different colours of the annunciator lights in cockpit?

Last Answer : RED: It indicates a failure in the system that requires immediate attention and action of the crew. AMBER: It indicates a failure or malfunction of a system that requires crew awareness, ... operation of a back up system. BLUE: It indicates normal operation of a temporarily used system.

How APU is started?

Description : How APU is started?

Last Answer : To start the APU a. Put the BAT switches ON. b. Push the MASTER SWITCH. A blue light will illuminate. c. Wait until FLAP OPEN indication appears on the ECAM System Display. d. Once intake flap is open ... g. Push the EXT PWR switch to OFF. h. Put the APU BLEED ON, indicated by a blue light.

How will you drain the reservoir if it is overfilled?

Description : How will you drain the reservoir if it is overfilled?

Last Answer : To drain the excess amount of fluid filled, a drain port is provided at the bottom of the yellow and green reservoir. For blue system, a drain port is provided on the blue hydraulic panel.

What are the safety precautions will you take before re-filling the hydraulic reservoirs?

Description : What are the safety precautions will you take before re-filling the hydraulic reservoirs?

Last Answer : The safety precautions for servicing of hydraulic reservoirs can be stated as below: a. Hydraulic system depressurized. b. All slats and flaps are retracted. c. Thrust reverser is closed. d. Landing gear doors closed. e. Cargo doors closed.

What are the modules of this engine?

Description : What are the modules of this engine?

Last Answer : There are 5 modules in this engine. They are a. Fan b. Low Pressure (LP) compressor and intermediate case c. High Pressure (HP) system d. Low Pressure turbine e. Accessory Gearbox

What are the specification of this engine?

Description : What are the specification of this engine?

Last Answer : It is a two-spool high-bypass ratio engine having take-off thrust of 30,000 lbs. flat rated to approximately +30 degree Celsius. The engine has a single stage fan and 4 booster stages driven by 5 low pressure turbine and 10 high pressure compressor stages driven by 2 high pressure turbine.

What does each digit and character specifies?

Description : What does each digit and character specifies?

Last Answer : IAE stands for the manufacturer International Aero Engine. V25 designates that this engine comes under original V2500 series engines. 27 designates the rated sea-level thrust of the engine as ... to install on aircraft of Airbus Industrie. 5 designates the mechanical standard of the engine.

Which engine is installed in our (Indigo Airlines) aircraft?

Description : Which engine is installed in our (Indigo Airlines) aircraft?

Last Answer : IAE V2527-A5.

How APU provide constant electrical supply?

Description : How APU provide constant electrical supply?

Last Answer : Once acceleration phase of starting cycle is completed, the APU rpm is governed by fly weight mechanism. Any change in the rpm of the output shaft causes the force on the flyweight to change ... rpm. Thus the APU generator can supply electrical supply of constant frequency at 400 Hz 115 V.

In aircraft operation, the centre tank is used up before wing tanks? Why?

Description : In aircraft operation, the centre tank is used up before wing tanks? Why?

Last Answer : In normal operation, first fuel from the centre tank is used and then from wing inner fuel cell and at last from the wing outer cell. The centre tank is used first in order to obtain better ... the fuel can flow from wing to engine under gravity also which is not possible from the centre tank.

Up to what altitude APU can be operated?

Description : Up to what altitude APU can be operated?

Last Answer : APU can be operated up to around FL420. Up to around FL 250, the APU can provide electrical power of 90 kVA ampere rating as well as pneumatic power for air conditioning/pressurization and ... of providing pneumatic power and electrical power it provide drops to power rating of 66 kVA.

What is THS? Why is it used?

Description : What is THS? Why is it used?

Last Answer : THS or Trimmable Horizontal Stabilizer is actually a horizontal stabilizer, or tail plane as it is sometimes called, which can change its incidence angle in flight, automatically or manually to ... angle of attack of the entire horizontal stabilizer to maintain a correct angle of attack of the

How much torque would you apply to tighten the nut of brake assembly?

Description : How much torque would you apply to tighten the nut of brake assembly?

Last Answer : 150 ft.-lbs.

What are the solvents used in compressor wash?

Description : What are the solvents used in compressor wash?

Last Answer : In eco wash, pure demineralized water is used.

What is the difference between eco wash and compressor wash?

Description : What is the difference between eco wash and compressor wash?

Last Answer : Eco wash itself is basically a compressor wash. In early compressor wash, the water being used in compressor wash are discarded as it is expelled through the engine core exhaust. But in eco wash, ... its ecological balance and that is why this type of compressor wash is termed as eco wash.

What is eco wash?

Description : What is eco wash?

Last Answer : Eco wash is the name given to compressor wash being employed in now-a-days.

What are the initial and final torque values for A321 main landing gear wheels?

Description : What are the initial and final torque values for A321 main landing gear wheels?

Last Answer : The initial or bearing setting torque value for A321 main landing gear wheel is 310 ft.-lbs. and the final torque value is 160 ft.-lbs.

What are the electrical supply provided by the different supply sources of aircraft?

Description : What are the electrical supply provided by the different supply sources of aircraft?

Last Answer : The IDGs installed on each engine and the APU generator supply 115V 400 Hz 3 phase AC supply of 90 kVA. The emergency generator i.e. CSM/G supply 115 V 400 Hz 3 phase AC supply of 5 kVA ... supply connected to the aircraft should supply 115 V 400 Hz 3 phase AC supply of 90 kVA power rating.

What are computers used in A321 related to landing gear and flight controls?

Description : What are computers used in A321 related to landing gear and flight controls?

Last Answer : Landing gear related computers are LGCIU - Landing Gear Control and Interface Unit BSCU - Brake and Steering Control Unit ABCU - Alternate Braking Control Unit Flight controls related ... Computer FMGC - Flight Management and Guidance Computer FCDC - Flight Control Data Concentrators

Which hydraulic system supplies brake pressure?

Description : Which hydraulic system supplies brake pressure?

Last Answer : The green system pressurized the normal braking system while the yellow hydraulic system provides hydraulic pressure for alternate braking and parking brake.

How many times we can use the brake accumulator without the system pressurized?

Description : How many times we can use the brake accumulator without the system pressurized?

Last Answer : The brake accumulator is used to supply pressurized fluid for operation of parking brake. Without the yellow system pressurized, we can apply parking brakes for a maximum of 7 times.

Where is brake accumulator located?

Description : Where is brake accumulator located?

Last Answer : The brake accumulator is located on the right hand side of the aft frame of the main landing gear wheel well area.

What is air pressure charge in hydraulic accumulators in A321?

Description : What is air pressure charge in hydraulic accumulators in A321?

Last Answer : The three system accumulators are pressurized with N2 to a pressure of 1950 psi. The brake accumulator is pressurized to 1200 psi pressure.

What have you learnt in the last 6 months? (Where have you worked recently and what have you learnt?)

Description : What have you learnt in the last 6 months? (Where have you worked recently and what have you learnt?)

Last Answer : I have undergone apprenticeship in Air India recently. I have performed wheel change, IDG oil filter change, accumulator air pressure charging, hydraulic system servicing, compressor eco wash on Airbus A321.

Which of the two hydraulic systems, Yellow and Blue, is generally used on ground? Give your reasons for that.

Description : Which of the two hydraulic systems, Yellow and Blue, is generally used on ground? Give your reasons for that.

Last Answer : Normally the yellow hydraulic system used. Firstly because, if at any point, if we require the green system to be pressurized for operation of some component, we can pressurize it with the ... need yellow hydraulic system to be pressurized. Blue system is not available for cargo door operation.

If hydraulic power is required on ground, which hydraulic system can be used and why?

Description : If hydraulic power is required on ground, which hydraulic system can be used and why?

Last Answer : Both Yellow and Blue hydraulic system can be used. Because, only Yellow and Blue hydraulic systems are equipped with electric pump?

Other than for their designed purpose, have you creative uses for mouse and rat traps?

Description : Other than for their designed purpose, have you creative uses for mouse and rat traps?

Last Answer : I could think of some (catapult, other trigger mechanisms), but I do not use them because they seem to me prone to damage someone or something I wouldn’t want to damage, and I don’t have mouse/rat problems (I usually have cats). I think I do have some of those traps, though, not set.

Would you ever willingly eat a meal cooked by a sentient rat?

Description : Would you ever willingly eat a meal cooked by a sentient rat?

Last Answer : If Ratatouille were the chef, I would eat the meal.

Rat my colleague out, or not?

Description : Rat my colleague out, or not?

Last Answer : I would have to say something, perhaps anonymously. There are two kinds of people I can’t tolerate: One is a liar, one is a thief.

So I was just at Safeway picking up burrito stuff. The woman in front of me in line was sporting a pet rat in her arms. Would this bother you?

Description : So I was just at Safeway picking up burrito stuff. The woman in front of me in line was sporting a pet rat in her arms. Would this bother you?

Last Answer : Animals in shops are a no-no for me. Except for assistance dogs of course.

Is Mr. Harward an example of shi*s deserting a sinking rat?

Description : Is Mr. Harward an example of shi*s deserting a sinking rat?

Last Answer : Rats deserting a sinking ship works just fine.

Suggestions on removing a RAT or KL?

Description : Suggestions on removing a RAT or KL?

Last Answer : I did a search for skypehost.exe and found this article about it in Windows 10. It appears to be legit, but wasteful and several methods are suggested to remove it. . Here is another article about it. I can’t answer the RAT or KL question but, no doubt, someone will shortly.

What can you tell me about Rat Terriers?

Description : What can you tell me about Rat Terriers?

Last Answer : answer:My little terrier Mona does shed, but if you brush her every night, it's not bad. She is extremely high energy, but after puppy stage will settle down and play with toys, but they are still a ... fun pet, probably loves to play more than any dog I've ever had, which is a considerable amount.

Why is my pet rat afraid to step on its new bedding?

Description : Why is my pet rat afraid to step on its new bedding?

Last Answer : Maybe he is sensitive to something in the new bedding. I would try a different product.

I need some advice on a rat in my cupboard?

Description : I need some advice on a rat in my cupboard?

Last Answer : answer:Perhaps poison the trap bait (I'm assuming the pets can't reach the trap)? If you know where it's getting in you can stuff the hole with cat litter soaked with cat urine might scare it off. ... might want to grease/oil your trap to make sure it's as sensitive and quick to spring as possible.

How to befriend my new pet rat?

Description : How to befriend my new pet rat?

Last Answer : Food, food, and more food! Rats LOVE food and will tame down quickly with food rewards. A bit of peanut butter on a bite of bread or a piece of fruit like watermelon or apple will have ... into the room. Rats are very intelligent and positive rewards always work woth most animals, including us. lol

Is it easier to pull a rabbit out of a hat or a habbit out of a rat?

Description : Is it easier to pull a rabbit out of a hat or a habbit out of a rat?

Last Answer : It is easier to pull an ambit out of a cat.

Stealing money in the workplace - Do you rat out a co-worker/friend?

Description : Stealing money in the workplace - Do you rat out a co-worker/friend?

Last Answer : details?

Advice on caring for a new hairless rat?

Description : Advice on caring for a new hairless rat?

Last Answer : answer:No. Rats are highly intelligent creatures, and they need to be able to interact with their environment in order to feel comfortable, confident and settled within it. They interact with their environment by ... be caught. Let your rat explore in a closed and secure room, or in a playpen.

Why do people own rat dogs?

Description : Why do people own rat dogs?

Last Answer : Because they fit in purses. sad

Help!,rat invasion!

Description : Help!,rat invasion!

Last Answer : I suppose you can always try to beat it to death with a stick…or just shoot it?

Is a rat zapper likely the least painful way to exterminate mice?

Description : Is a rat zapper likely the least painful way to exterminate mice?

Last Answer : You are a mouse lover? Kinky! (And you ask about exterminating them. Did one cheat on you?) Not knowing what a Rat Zapper is makes it hard to answer with any authority, but I am unaware of any ... them using a humane trap and then release them in a remote area. (Often my Mother-in-Law's yard.)

What would you do if you found this rat in your home ?

Description : What would you do if you found this rat in your home ?

Last Answer : Start petting it.