ATR systems - Flight controls
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- Опубликовано: 14 авг 2021
- ATR aircraft have manual primary flight controls with electrical trim and hydraulically powered secondary flight controls. All variants are covered.
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I fly as passenger frequently on Finnairs (Norra) ATR planes, your educational videos has made my flights really exciting, knowing how the airplane works and basic routines! Thank you!
I'm slowly working my way through the vids. I have to say the presentation and explanation are excellent. Easy to understand and a total joy to watch for anyone interested in how an aircraft works
Awesome, thank you!
Agreed
Great video thanks Magnar, I really like the footage inside the rear access panel. I only fly the ATR72-600 but enjoy learning about the other variants, keep up the good work.
What a neat video! Love seeing the large space behind the bulkhead, I thought it would be absolutely crammed but is isn't!
Yet another excellent video! Many thanks for that!
Crisp, Clear and Concise video Captain. I enjoyed this thoroughly. Thanks!
Thanks for excellent flight controls and systems review. Waiting for more...
Thanks for help Azul Air lines' pilots from Brazil! 👍✈️
Thank you for another one 👏👍
I really liked this video. 👍
Great video thanks Magnar. I am starting ground school on the -500 next week and your entire collection has been invaluable. Regards :)
Glad to help!
Hello great cinematography thanks for sharing this with us saludos
Awesome video
Thanks for the wonderful sharing sir
Very useful thanks for you
Good work captain, thanks for the educational video, at 8:30 does this mean both props are rotating in the same direction? which one? and does it feel like a Cessna in take off? I mean do you have to apply right rudder during the take off roll? thanks
Both propellers are rotating clockwise when viewed from behind. As I say in the video, the rudder trim is set to neutral at take-off. The ATR has a natural tendency to go straight on the runway. When you rotate, there's a slight yaw to the left, but most pilots do not even notice it. Once established in climb, the aircraft is going straight. As the speed increases, there will be a need to trim the rudder to the right.
Hi captain! Amazing video as usual.
In case of pitch disconnect, is there a way to fix which control column will be PF, or it a random chance ?
When both elevators are free, it's up to the pilots to decide who shall be PF.
Usually a pitch disconnect is manually done after an elevator jam, in which case, the pilot on the unjammed side will need to be the PF.
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Thank you for a great video. Quite informative. I am not working in the aviation industry, just interested in aircrafts. I have a question. From your videos, what I understand is that, the main flight controls are operated by pure physical muscle power, isn't it? It is not assisted by hydraulics? In the age of power assisted steering in cars, why are the flight controls are not power assisted? I assume in larger aircrafts, the controls are operated by hydraulics. So, up to which size of aircrafts are the flight controls not assisted?
Hello, Captain. Why do we have the 180 IAS limit for ELEVATOR JAM and PITCH DISCONNECT? Is it to prevent structural damage to the control surfaces?
No, it has to do with the controllability of the aircraft. When you have only one functioning elevator, you have reduced controllability, and the higher the speed, the higher the control forces.
Very educational. What's the reddish fluid stains all over the inside walls of the tail cone ?
It's a anti-corrosion coating. It's thin, enabling it to penetrate very small gaps.
It seems a bit ironic that it is a rusty colour. 😁
Hello Magnar, what a wonderful video!
The rudder is quite complicate, but it seems to work very fine in terms of pilot comfort.
I think you did a very good explanation for the working principle of the rudder.
A little question came up during watching your explanations regarding the rudder:
When you move both yaw trim switches to position "NOSE RH", does the spring tab move to the left (when viewing the rudder from top) or right, and what would be the indication?
It is a bit confusing to me, since the switch is about the "aircraft nose", and the trim indicator shows the "motor displacement".
From my understanding the trim tab must move left to yaw the aircraft to the right... *total confusion coming up*
When you move the trim switches to the right, the spring tab moves towards the left. This creates an aerodynamic force that moves the rudder towards the right, which in turn creates an aerodynamic force that moves the tailfin to the left, causing the nose to turn to the right.
The deflection of the spring tab depends on two factors: Trim tab motor displacement and the airspeed.
@@FlywithMagnar Thanks for confirmation. So the indicator in case the switches are moved to right ALSO point to the right (despite the trim tab is travelling to the left)?
Captain, if we don't get the 'jolt' for Rudder Cam - Center...do we have to redo the checklist item?
@@mrturboprop1743, no, we don't. That means the rudder cam is already perfectly centered.
Bro nega ena app la bro edit pandega bro plzz next videos la soluga bro
How do you manage a go around with Flap Unlk on approach? Do you keep flap 30? Or go to flap 15 like normal on a go around? Also speed management with flap speed limits??
Why does the ATR72 rudder trim tab end with a flat plate instead of a streamlined trailing edge like a normal aerofoil?
Because it doesn't make any difference when it comes to drag.
Great video! I was just wondering why are the aileron indication displayed in white while the rudder trim indication is displayed in green in Autopilot for the 600 variant?
When the Autopilot (AP) is engaged, the aileron trim indicator is white, indicating it is inhibitted. When the AP is disengaged, the aileron trim indicator is cyan, indicating it can be operated manually.
When the Yaw Damper (YD) is engaged, the trim indicator is green, indicating the rudder trim is automatic. When the YD is disengaged, the trim indicator is cyan, indicating it can be operated manually. Note: The AP can only operate when the YD is engaged.
@@FlywithMagnar Thank you for the explanation!
@@FlywithMagnarcant we use rudder trim manually ,if yd is engaged and autopilot is disengaged? if so how to correct the trim if slip indicator in ehsi shows slip or skid?
@@shivapoudel9059, on the 600, the rudder trim is automatic when the yaw damper is engaged. It will keep the slip indicator centered. It can even counteract an engine failure.
@@FlywithMagnar if we use rudder trim manually with yaw damper engaged, does it move rudder trim setting or not? and more query..do we need to center the rudder trim manually after the yaw damper disengagement while landing or not?cant we land with yawdamper on in atr 72 600.
How do the elevator and rudder control cables/rods pass through the aft. pressure bulkhead without leaking cabin air or abrading?
Pressure seals are installed where cables (or rods) move through pressure bulkheads. The seal grips tightly enough to prevent excess air pressure loss but not enough to hinder movement of the cable. In other words, there's a small air leak, but this is acceptable. Reference: www.aircraftsystemstech.com/p/aircraft-rigging-aircraft-rigging.html
@@FlywithMagnar thank you sir
Greetings Captain, I need ask a few questions to assist in understanding the system. Specifically, 1) With autopilot and yaw damper engaged . To trim the rudder in the yaw axis is the autopilot doing the trimming on the spring tab or only the rudder or both i.Or is it the yaw damper only providing the signals?
2} In manual flight when we move the yaw trim control switches are we acting on the spring tab only or on the rudder and spring tab simultaneously? I am somewhat confused. Many thanks
Rule #1: The rudder trim acts on the spring tab. The spring tab acts on the rudder, and the rudder deflection increases with the airspeed.
Rule #2: To use the autopilot, the yaw damper must be engaged.
In aircraft without glass cockpit, it is the pilot who acts on the rudder trim reagerdless of the status of the yaw damper and autopilot. In aircraft with glass cockpit (600 version), the rudder trim is automatic as long as the yaw damper is engaged.
@@FlywithMagnar Thank you
I wonder why ATR never decided to utilize spoilers for landing until the 42-600s?
In the late 1980s, when ATR 42 was developed, the company considered that the market for STOL aircraft to be too small to be commercially viable. They were right because de Havilland Canada made excellent STOL aircraft, which sold in small numbers. However, when the Dash 8-100 and -200 are no longer are in production, there's a growing market for a 50-seater that can operate from 800 m runways. Therefore, modifying an existing design makes sense today.
Sir please upload the door,navigation and communication.
What is the neutral position of pitch trim indicator ? 0 or 1 ? for ATR 72 500 and ATR 42 320?
Neutral trim is used when the centre of gravity is 25%. For ATR 72-500 the trim is set to 1.3 up. For ATR 42-320, the trim is set to 0.0.
Hello Magnar. What is the max altitude at which flaps can be extended?
There's no max altitude, only max speed.
Hello captain¡ in case of flaps asymmetry or flaps unlock that you have to land with reduced flaps, how do you decide if it’s going to be flaps 15 or flaps 0 table¿
Asymmetric flaps: Use the speed for indicated position. If it's between two positions, select the one that gives the highest approach speed.
Flaps unlock: The flaps is at 0 position.
Hi Cap! :) Why is the pressure bulkhead full of oil spills?
It's not oil. It's a thin primer used to prevent corrosion.
@@FlywithMagnar Ohh, I see. Thx for the reply! :)
Hi, I have a little doubt, does the atr 42-600 and 72 fly by wire? Or doesn't have any fly by wire system?
No, all ATR aircraft have mechanical flight controls.
With autopilot engaged and yaw damper engaged ,if we get a RUDDER MISTRIM on the FMA .(Say engine failure during cruise) What are the corrective actions ? I cant find anything in the QRH or FCOM Thank you
When you have a rudder mistrim, you must disconnect the autopilot and trim the rudder manually. In case of engine failure or shut down during cruise, you should reduce the speed to less than 180 kt to activate TLU low speed mode.
@@FlywithMagnar Much appreciate your time for responding to my question . Many thanks! You are the best !
Dear Captain , under what conditions do we use the standby pitch trim ? Many thanks.
When the normal pitch trim doesn't work.
@@FlywithMagnar ok ,so what would cause the normal pitch trim to be in operative for example?
Thank you
@@user-ey3rg3nc5s, loss of electrical power, mechanical failure in the switch, etc.
So, no provision for aileron jam. How easy is it to control roll with the rudder?
We do this scenario during our type rating course. It's pretty easy to fly with the rudder because it's very powerful. A jammed rudder is a little harder, but we can still land safely.
@@FlywithMagnar Thanks for the info, and for your videos generally.
does anyone know how ATR 42 Ailerons is connected to the wing itself?
Yes, with three hinges.
@@FlywithMagnar Thank you