FSLabs A320-X Basics: Groundspeed Mini (GS Mini)

[@CK-rg2ku]

Great video! Thanks! I really like those insights which you rarely find anywhere else. And quite amazing that the FSLabs bus simulates these things correctly.

[@Blackbox711]

Hi Carlo. Yes, when I made this video I was also very impressed that this SIM is simulating this feature so well. Regards

[@riteshsinhamithu]

Video deserves a million likes!!! Shows the practical application of GS Mini Function!! Thanks Blackbox711

[@panosbilios6827]

Each one of your videos is a true learning experience Thank you!

[@Blackbox711]

Hi Panos. Thank you very much for your kind words! Regards

[@DO246-c5v]

Outstanding teaching, Blackbox! Thank you so much.

[@Blackbox711]

Thank you for watching 👍🏼

[@emillutzkanov1348]

Best channel on youtube for A320 !

[@Blackbox711]

Thank you very much 👍🏼

[@ibe3174]

Wow! Great explanation. This one was my question a couple of days ago on twitch, so i don´t know if my question motivated you to do this tutorial but i really really want to thank you. Finally i understand that GSmini thing. Thank you! NunTsuKao

[@Blackbox711]

Hi ibe3174. It was you that asked me about GS mini during my stream?! :) Yes, that was the main reason I made this video since it is so difficult to explain with plain words. So I knew my explanation on the stream wasn't satisfactory. And I am sure this question will be asked again in future, so now I can just post the link for this video. Thank you for your nice comments! Much appreciated. Regards

[@germantobon5498]

Fantastic learning tools, As an A320 pilot I have a special request, could you run and excessive using an incorrectly entered tower wind to a high tail wind value, to observe its adverse effects? Thank you very much!

[@hubermarcelo4273]

Hi why do you have to set the QNH and the temperature on the APPR phase and do you decrease 1 value on the QNH vand increase 1 on the temperature like you did in a video to calculate the takeoff performance just in case if it drops or increase. I know it is off-topic but I just want to know the function of those values on the APPR phase and thank you for this amazing video :)

[@Blackbox711]

QNH and Temperature entry in the Approach Phase Page is required for cabin pressure control and is entered with exact values.

[@hubermarcelo4273]

@@Blackbox711 Thank you so much!!

[@Abhinav-uu8hp]

@@Blackbox711 But does the QNH and Temp have no role to play in Landing performance?

[@joaosperb]

Great video and explanation! Thanks!

[@Blackbox711]

Thank you for kind feedback 👍🏼

[@romanomassa7372]

Amazing explanation !!! Thank you

[@Blackbox711]

+Romano Massa ... Thank you for watching 😊

[@ayushroy2347]

Great video! Can you please explain what would happen if GS mini function would not be there in both cases?

[@Blackbox711]

Hi Ayush. Thank you. You would set the Vtarget manually (selected mode) by the formula (VLS - 1/3 Tower HWC). So for example 137 kts. In the first approach you would have to constantly have a higher thrust setting because the headwind component decreases from 35 to 15 kts. If this happens steadily, no big deal. If it happens with gusts you would most certainly chase the Vtarget because your indicated airspeed would jump all over the place. In the second approach you would have to decrease thrust because the headwind increases and then once the headwind decreases again, you would have to increase thrust quite a bit. Once again if this happens in a very abrubt manner you would have to really work the thrust levers to manage the Vtarget yourself. Regards

[@devikakarmakar99]

Very well explained.

[@Blackbox711]

+Debashis Karmakar .. thank you very much 👍🏼

[@zohidkurganov8110]

Thank you very much bro, respect you

[@Blackbox711]

Thank you for watching 👍🏼

[@leb6599]

Well done!

[@suncvn]

Always great videos from you Captain.Requesting you to make a totorial video on adr1+2 fault.I got this warning msg just now while on ground just before take off.

[@Blackbox711]

Hi suncvn. Thank you. ADR1 and ADR2 fault on ground? Was that a random failure? I'll put your request on my list, could take a while to produce the video thought. Regards

[@suncvn]

Thank you Captain for your response.Yes it was a random failure.Please take your time, eagerly waiting for the lesson

[@tiffany51793]

Hi! Expert out there can i ask for your help? ! i get a bit confused here... on 2:43 it explains that VTarget = Greater of VAPP or GS MINI + ADIRS HWC, ( Isnst the value of VAPP here is greater than the GS Mini ( which is 136 , instead of 121 ( the ground speed mini) shouldnt we take that value instead?) sorry for this dummy question .

[@Blackbox711]

tiffany51793 .. hi. I think you got confused with the different definitions here. The endresult ist Vtgt, the magenta speed bug which varies according to the actual wind component. VLS is a fixed speed, dependent on Grossweight and flap configuration and always gives a fixed buffer to the Stallspeed. Vapp usually is VLS plus 5 kts (until a Windcomponent of 15 kts) and will govern the Vtgt unless you have very strong winds like in the example you are quoting. Here the resulting value of GSmini + ADIRS HWC is greater the the mentioned Vapp and hence this is displayed as the Vtgt (magenta Bug on Speedscale). Vapp becomes the governing value (136 kts) when the combined value of GSmini plus ADIRS HWC falls below 137 kts. Hope that clarifies it a little?

[@semihciftci2949]

Great explanation thank you 🙂. What happens to GS mini function when the wind changes to tail ? Thanks in advance…

[@Blackbox711]

It will go to VLS + 5 kts

[@semihciftci2949]

@@Blackbox711 I get it. many thanks...

[@spielgespieltDE]

Mein Vorschlag wäre die "Abdrift- Technick" (hoffentlich korrekt so) bei den Crosswindlandings. Mich würde die Berechnung enorm interessieren, habe zwar im Internet gesucht aber nichts Hilfreiches gefunden. Wäre interessant es mal in einem Video zu sehen :)

[@Blackbox711]

Hi nochmal. Mensch, da kann ich ja auch auf Deutsch antworten :-) Ich kenne eigentlich nur die "Cross-Control" Technik. Wie lautet dann der englische Begriff? VG

[@ElZoido83]

Danke für das geniale Video! Nur nochmal zum besseren Verständnis ... heißt das in deinem Fall, dass falls die ADIRS HWC unter 15 kts gefallen wäre, VTarget bei 136 kts IAS geblieben wäre? Der Bus bleibt also immer mindestens bei VApp?

[@Blackbox711]

Hi Daniel. Dankeschön. So ist es, VApp ist mindestens VLS+5 kts. VG

[@flyhigh8817]

Hi Blackbox, your videos are amazing!!!! I've already learned so much! Could you please teach us the Madeira approach???

[@Blackbox711]

Hi Fly High. Thank you very much! Madeira is tricky, I know. I will try to get a video on a Madeira Approach out as soon as possible. Regards

[@flyhigh8817]

Great!!! Thank you very much looking forward to it!!!

[@concorde9433]

Can you do single-engine taxi procedure? Thanks! :)

[@ehsan83]

so the TAS True Air Speed indication on the ND is in fact the V Target. is that correct?

[@Blackbox711]

No. The speedband and hence the commanded speed is Indicated Airspeed IAS or Mach Nr

[@ehsan83]

@@Blackbox711 ok thank you

[@Relax2437]

Hi, TWR reports 32G42KT & you land direct into wind, will the Vapp jump ? do you select manual thrust? Or you have a steady 35kts head-wind on rwy. In both conditions, at max payload, I imagine the nose-pitch would be some - degrees down? Wold this be a trickier landing? Thanx for yours excellent videos:)

[@Blackbox711]

Hi. Thank you! The VAPP, once calculated (VLS + 1/3 Tower wind on MCDU Approach page) remains the same. The VTarget is calculated via the GS Mini funktion and will move in the managed mode depending on the headwind component. In gusty conditions this will cause quite alot of movement in the VTarget. But remember, the GS Mini is making sure that a steady energy level overhead the ground is maintained. So practically the indicated speed and the VTarget pretty much move together, while the Groundspeed remains pretty constant. In a conventional aircraft where the VTarget is fixed, the change in indicated airspeed would have to be adjusted by thrust changes to chase the VTarget. Now the landing will still be trickier because the airflow over the wings does actually change with the gusty wind conditions and thus change the pitch values required to maintain the glide profile. Puuuuh, alot of theory! Now my head hurts. Just joking ;-) I have uploaded a video for you with gusty winds in the approach: kzbin.info/www/bejne/oZWwqqVreNSpr5o Carefully watch the Groundspeed and thrust settings!

[@Relax2437]

Thank you so much :)

[@Blackbox711]

J.D Invictus You're welcome

[@andyholmes9485]

Is this fully automated?

[@Blackbox711]

Hi Andy. It is if you insert the reported Tower wind (ATIS) in the Performance Approach Page and if speed on FCU is managed. Regards