How does the A320 Spoiler system actually work?

[@abdullahashour320]

We need a video of the hydraulic system and its pumps and PTU functions in detail please 😊

[@ProfessorJohnB]

Another excellent video. Thank you!

[@u-bum]

Very interesting information!!! Many thanks

[@thisisnico007]

very interesting, i love it. keep up the great work!

[@ProximaCentauribeta]

Was not aware of the rolling spoilers, never heard the term, thanks again for the enlightenment🙌 learning so much watching your vids🤗

[@Jet-Pack]

Awesome, thanks! I would also love to see a video about the load alleviation features.

[@sinicodaniel]

Great! 😊

[@boahneelassmal]

7:15 the sidestick basically sends a degree/s request, right? so I would assume that as soon as the there is a Δ between requested and current roll rate the roll spoilers deploy. which kinda also leads to another question: is it really that the roll spoilers only deploy at lower altitudes and not just lower speeds? Why would there be a difference (more precisely an improved roll action) in higher altitudes compared to lower altitudes at the same slow speeds?

[@fsclips]

Yes, it is speed dependent. At lower speeds the ailerons are less effective and get help from the roll spoilers. In some videos where people filmed an approach from the inside on a windy day you can see them working in tandem

[@boahneelassmal]

@@fsclips yeahyeah, I know. But you asked the question into the open, when exactly the roll spoilers are being commanded to move by the flight control computers. My uneducated guess would be that ass soon as the flight computers notice a difference between ist and soll. Which also leaves the other question I had still open: Is it really dependent on the altitude because I would expect the roll spoilers to kick in earlier (at higher speeds) in high altitudes compared to low altitude, due to the "thinner" air.

[@fsclips]

@@boahneelassmal Like I said in the video. I couldnt find any specific speed or anything when the roll spoilers are engaged. It is all done by the software. I guess it is not a set limit and the roll spoilers are implemented gradually instead of either zero or full, similar to the ground steering logic on take off.

[@ogaduby]

when you say ground spoilers "destroy all the lift", 9:14 does that happen with that hole in the wing that appears when flaps are fully deployed and spoilers fully extended... i always wondered about that "hole" and how those spoilers "hold everything", or maintain the lift if you will, when flaps are extended...

[@fsclips]

@@ogaduby No, the lift is created on the upper surface of the wing. The spoilers are changing the profile of the wing to such an extent that it will no longer produce lift. The fact that you can see the runway underneath the extended spoilers is simply because the flaps are extended. When they are retracted there is no gap underneath the spoilers. Again, the flaps change the shape of the wing and allow you to fly slower and therefore reduce take off and landing distances. I hope this helps

[@ProximaCentauribeta]

Heard you mentioned A.Floor and elac1 sec1, Flight kontroll systems, could you do a vid about the system. Heard a story once about a student training on toch and go's not arming the spoilers on touchdown and ending up loosing all flightcontroll except the rudders😲 instructor was able to land plane🙌

[@tubeslats]

If the speed brake will deploy automatically anyway if you forget, why require arming them?

[@fsclips]

@@tubeslats Because the logic to extend it is different. You want the spoilers to come up the second you touch down, not when you engage the reversers. Hope this helps 🙂