Vls speed a320. In addition, VLS increases with speed brakes extension.

Vls speed a320 9th Mar I know the FACs continuosly compute stall speed and compute the maximum speed but do the FACs also compute every other speed on the speed scale; VLS, alpha protection, alpha floor, green dot speed, flap retraction, etc. So should I have let the aircraft reduce the magenta speed of ~120kts, despite this speed being below the Vls speed? Microsoft Flight Simulator 1920×1080 231 KB. 28 vs The A320 vertical speed knob can be pushed in to command an immediate level off. - Represented by the top of an amber strip along the airspeed scale on the PFD. They show the upper and lower speed limits calculated by the FMGC. 13 vs after take off, 30 degree bank turn stall speed increase is approx 1. 7. Log in; Register; VLS is however a manoeuvre speed. Flying near VLS is dodgy and as has been noted before, on an intercept where the aircraft can command upto 30 degrees of bank to pick up the LOC, you could end up with egg on your face as the aircraft goes into Alpha Floor! The magenta D point, where the aircraft goes automatically into Approach mode is after POINT4. The value of VAPP is limited so that it is never less than VLS + 5 or more than VLS +15. It is in relation to the abiltiy of the 320,s/319,s and their ability to hold ref speed through the 1000ft gate until touchdown . Computed by the FAC, (PRO-SUP-10), take a look at the Vs - stall speed: Authorities allow aircraft of the A320 family to use the following factors: ‐ V2 = 1. Vls for 1+F is exactly that, so use it. Here you have the opportunity to not Tech Log - A320. Hope that answers the query. As was said before, some failure, i. Tech Log - Inhibition of speed brakes following config full - A320 - Hello everyone, think about the drag with gear down plus flaps full and speed brakes. Track planes in real-time on our flight tracker map and get up-to-date flight status & airport information. no failures) FCOM 3. Therfore, I've been warned to be careful with the speedbrake, especially when heavy/slow Now, can anyone tell me what will actually happen if the pilot allows the Vls to reach and exceed the current speed? Will the Could someone please explain the concept of green dot, S and F speed for the airbus A320. VLS : Lowest Selectable Speed. We are entering into the descent phase. PS: I attempted to land an A320 in a professional simulator with 263/12G37 winds approaching runways 28 and 23 but couldn't do it at all. As far as I know, the Sharklet wing (with 1. For 150K pounds it lists at 200 kts etc. you can also learn tons of stuff for the FMS (MCDU) here: smartcockpit. : at or above 20,000 ft. As a result, the K factor for the managed speed computation is different: NEO: K factor of 1/3 This article is the conclusion of our theme of speed management during a flight, which began in Safety first Issue #18. The VLS is your minimum allowed speed before you stall, and the Approach speed or VAPP on full flaps configuration should generally show 5 knots above the VLS. In this case, Vls = Vref. This is particularly problematic as the computed Vls Speed is not being maintained, and the indicated speed rises suddenly and unexpectedly. Here is what I do in the real A320 Simulator. Con la extensión de los speedbrakes completa, Is this for use in the A320? Hayden has added calculations for S, F, VLS speeds, etc already Mostly from FCOM Vol 3 performance. The absolute minimum speed on approach is Vls (lowest selectable speed), which is the top of the amber strip on the speed scale. 2). manoeuvres. 1 Vls (lowest selectable speed or Vref in landing config) + 5 knots (for autothrust) + 1/3 headwind component 1突发！载300人客机发动机起火！浓烟滚滚！ 2英航一空乘海外过夜期间突发意外去世！; 3两架波音飞机从中国交付工厂返美！ Tech Log - Airbus (320) Vapp determination - I am bit confused about how to determine Vapp, in particular in these conditons : - no ice accretion - no auto-thrust - no autoland - nil wind - normal conditions (ie. In the A320you’re looking at anywhere from 155/160 knots down to 135/140 depending on factors like landing weight, elevation, temperature, etc. V1 is also the minimum speed at which a pilot can continue take-off following an engine failure. VLS does not move during manoeuvres, but it does move (gradually) with changing aircraft mass and (quickly) with changes in the wing shape, i. *Possibly some do not clearly In this video I am explaining how the VLS is calculated, why there can be a difference between VLS in the FMS and on the Speedband, and how to adjust the VAP VAPP = VLS plus 1/3 of the tower headwind component. See FCOM Volume 3, LIM-13 SPEED LIMITATIONS page 5 --> 7. 2g buffet margin. Airbus say that VLS is the lowest selectable speed, but you can actually select 100 kts. ) add 13 kts to the vref to get new vapp. VREF为全形态下VLS，如下图显示，在FULL构型下，则VREF=VLS. e. My managed speed should have been at 137 knots instead it was above 140 knots, why is it Tech Log - A320 Go-Around Speed - Hello all, the scenario takes place at a high elevation approach surrounded by high terrain, a go-around is commenced, Pull speed, 160 kt. Then you can select Flap 1 as you are below 230 kts, VLS will then drop and you can wind the 具体数值来自a320-232飞机fcom中的数据。 vls 将根据马赫效应做出修正，以保证 0. VREF+10 Knots for example. Or less, down to Vls as needed. (37-12=25. An A320 at 64 tonnes (MLW = 66t): Vref, flap full, is 134 knots and Vref, flap 3, is 139 knots, so the normal approach speed is 220 kts is a good speed in the A320 as unless you are high and heavy, you can apply half speed brake and the VLS will be around 210kts. This requirement is always satisfied. 3 × 0. You can’t go too slow, and you can’t go too fast. 28vs Conditions: Landing Runway 27, Winds 270/15, Vls 125, A320 CEO, Spot Head Winds 25kts. Below is a detailed breakdown of the And in the A320, when you have an issue with the Slat/Flap system, aircraft speed becomes your most basic problem. We know the FAC computes min and max speeds such as VSW, VLS, F speed etc. 另外，当减速板伸出后，vls 增加。f最小收襟翼速度起飞时最小收襟翼速度。进近中，飞机为 conf 2 或 conf 3 时，被用作一个目标速度。 I believe S speed indicates the lowest speed in config 1, Minimum speed with slats out. Computed by the FAC, based on FMS, and corresponds to 1. Speed is selected at exactly VLS (or maybe 2 kts below), because at that speed the flight directors (and with that all managed modes) Tech Log - A320 /A319 Ref speeds - This has been subject to debate on several occassions and I would like to get a definitive answer. Zeeflyboy October 8, 2021, (A320 FCOM - Autoflight - Flight Management - Performance, emphasis mine) Share. Green Dot speed, which is defined on the A320 and A319 as [GW in tonnes x 2] + 85 (knots). 1 tow = 68. Sometimes it can climb above, and hide VLS. CoatedPepper671 June 16, 2024, 5:28pm 1. 23 VS (instead of 1. - Hello All Question: Descending with OP DES and green-dot-speed gives a very shallow ROD, (less than 700FPM with a standard weight) try and use speed-brake and the VLS shoots up, even worse on 321. Than the vls line comes and disappears again. the forum for this issue and I only found a topic about the 'speed' callout because the VAPP speed was too close to the VLS and sometimes the speed decreased to VLS. Input various weather, runway, - VLS => Lowest Selectable Speed is the slowest speed the Airbus lets you fly. VAPP correction is not increased further for headwinds exceeding 45 knots. Tech Log - VAPP computation: A320 Abnormal procedure In other words, is the delta VREF added to VLS config 3 or VLS or config Full? At my company, Log in; Register; Forums. Appears as you say the A320 have exceptionally low fidelity, and it a shame the the FBW will never be available to Xbox user such as myself. 006 whichever is lowest. Of course you are able to select from VMAX down to VLS whenever needed but the following are suggested as flexible and comfortable speeds to use in line operations. VLS is the lowest selectable speed for the autopilot and the autothrust. speed brake deployment and flaps/slats. VLS in the MCDU is shown as 139knots, but VLS on the PFD speed tape is 137knots. 07A --> SPEED AT RUNWAY THRESHOLD: VLS Why? Reply. VLS really means the lowest achievable speed with the autothrust engaged, you can fly The MCDU calculated speeds appear to be much too fast. Just follow that speed and you should be good. The Airbus A320 has two Flight Augmentation Computers (FAC 1 & 2) which are considered part of the Auto Flight FMGS Stalling speed: VLS: Lowest Selectable Speed: F Speed: Minimum flap retraction speed after takeoff: S Tech Log - V Alpha prot A320 - Hello folks, Could somebody explain me how the logic of the lower speed tape is? Sometimes we see only v alpha prot without the thin vls line. It provides pilots with essential flight information such as attitude, speed, altitude, heading, vertical speed, and flight mode annunciations in a consolidated and intuitive format. 23 Vs (stall speed). Vapp: 125+5 = 130; GS Mini: 130 – 15 = 115 (minimum ground speed that aircraft will maintain) lower approach speed is possible in Airbus A320 NEOs. If thrust is idle at αPROT, aircraft will not maintain straight and level, it will pitch down and descend to maintain speed. Max windshield wiper operations speed (V WW): 230 KIAS Max window open speed (who is going to open it?): 200 KIAS Max tire speed: 195 kts. 1. vls是最小可选择速度，起飞时取1. Speed Tape Restriction: During the approach, the speed exceeds the calculated Vls Speed. Valpha prot does move during AoA changes, e. A320; By Max Kraus January 12, 2023 in Microsoft Flight Simulator (2020/2024) Prev; 1; 2; Next; Page 2 of 2 . So providing it is set to CONF 3 the GS Mini should be available ( F Speed disappears from speed tape on selection of landing CONF ) and Landing memo will Tech Log - A320, speedbrakes and Vls - Hi! When using speedbrake on the -320, the Vls is going up. 2 × 0. 28 VS), the alpha protection strip would hit the VLS strip on the PFD. FMGC (MCDU) VLS and FAC (PFD) VLS - Sometimes I see that VLS in the PFDs is significantly higher than that of the PERF page. Flap 2 would typically come at interception of glide slope, gear down and then to be The A318, A319, A320 and A321 have exactly the same maneuver margin that a conventional aircraft would have at its reference speeds. The main objective is to manage threats to the airspeed and avoid speed excursions. Reply. (Represented by the top of an amber strip along XA-VLS / XAVLS (Volaris) - Aircraft info, flight history, flight schedule and flight playback The world’s most popular flight tracker. For me it’s a lot more stable and easier to land. How do you calculate VREF when the PERF page just gives VAPP and VLS? Jump to Someone more familiar with the A320 could elaborate with more authority on alpha floor and other protection systems in normal law. 7 lw = 68. zfw = 62. Note that this is based on my observation of managed speed, not on a written profile, and is simply my suggestion of comfortable speed ranges for a given flap setting. overweight landing, you fly at VLS, if then you need to go around this VLS is pretty useful when it is at or above Vmcl. So I asked for F1, You fly below your maneuvring speed but > VLS. VLS is represented by the top of an amber strip along the airspeed scale on the PFD. The wind V1 is the maximum speed at which a rejected take-off can be initiated in the event of an emergency. 08, 1. 04. com Minimum Speed will be VLS. In addition, VLS increases with speed brakes extension. Vali. Tech Log - Is VLS kind of speed can't be violated in A320 family ? - This is one of the finer points in understanding the Airbus. A few perplexing A320 questions. com Smiths_Thales_A_1_0_1_FM_Pilot_Guide. Represented by the top of the amber strip along the airspeed scale on the PFD)? #vls #vapp #speed #calculation #indication Tech Log - Selected Speeds on A320 - Why is it that even the VApp is SELECTED in case of failures like Dual hydraulic and Slats/Flaps jammed in the A320. 13 VS1G. . 2) below 20,000 ft. 2. Reply reply nwgruber You can not engage AP with air speed below VLS. VLS : - Lowest Selectable Speed. pdf. Improve this answer. According to the Airbus A320 Quick Reference Handbook (QRH) the Vls speed for an aircraft When a landing flap configuration is selected (i. Myself, personally, though I always set my VAPP to be 10 knots above VLS. Now the overspeed alert and VLS that you see, Tech Log - A320 FAC/MCDU Speeds - Hi All A few perplexing A320 questions. For normal approaches. 25. Go-around with Slaps/Flaps jammed / very late Go-around (at threshold) during overweight landing etc. Vapp = Vls + (5 knots or 1/3 of the headwind component, whichever value is greater). v1 = 149 vr = 154 v2 = 157 vapp = 158 vls = 153. 2 airbus-a320. Hello When speed goes down and i would have reaches Flaps 1 speed i than would push down spoilers to reduce speed further. And one of them is when you have to do an overweight landing. It’s represented by the top of an amber strip along the airspeed scale on the Primary Flight Display (PFD). In this cases if you have a late Go-around, speed symbol. Max taxi speed for 90° turn: 10 kts. I know there are significant limitations in the programming of the MCDU in the stock There are some circumstances where you are required to reduce speed to Vls during the approach. The landing distance requirement is exactly what it implies, Let's take a 66T A320 with GRN+YLO failure on a dry, still 26L at LGW (LDA 2831m) Tech Log - A320 Flap Cong on MCDU in Emergency - Dear Sirs, In my company during emergency operation; if procedures required to land with flap confg 3, Normally this is of no consequence if there are increments to be added to VLS as the managed speed will then be above F speed anyway. 25/2= 12. , so basically the Why doesn't the autobrakes and ground spoilers deploy on the A320 if the speed is below 72 Tech Log - A320 flap 2 VLS increase - Does anyone know why VLS increases and then decreases. VLS is the lowest selectable speed (non-managed auto-thrust engaged). 94 VS1g = 1. On the contrary the A350/A380 have an ALT button that commands the autopilot to level off at the altitude at the time the button is pushed. However, there is no reason to fly below Vls, and your airline SOPs probably state VLS : - Lowest Selectable Speed. 2: FAC will display envelope speeds on PFD based on MCDU GW and CG but ELAC will follow different speeds than what is shown on PFD. Ł The upper limit is the target speed + 20 knots, but will not exceed V MAX, V MO-3 or M MO-. If thrust is In this video I am explaining how the VLS is calculated, why there can be a difference between VLS in the FMS and on the Speedband, and how to adjust the VAPP to On approach, we do extend slats at green dot but from there the minimum speed becomes VLS plus 10kts. Flap 2 would typically come at interception of glide slope, gear down and then to be fully configured by 1000AGL (stabilized approach). that calculates you Vapp and Vls speed. The magenta equal sign indicates the target airspeed. The target fly speed on approach is the magenta arrow on the speed scale, which represents Vapp. Or Vls+5. Then you can select Flap 1 as you are below 230 kts, VLS will then drop and you can wind the Note: If in CONF 0 VLS were 1. The issue here seems to be that what the FMGS thinks VLS will be is not perfectly aligned with what the FAC thinks VLS will be. Posted January 12, 2023. Community Bot. However would the FAC speeds on the speed tape differ to that calculated by the MCDU? 2. legoboyvdlp Posts: 7981 Joined: Sat Jul 26, 2014 2:28 am Location: Northern Ireland A320 FLIGHT CONTROL LAWS PROTECTION Last Updated: 15th April 2025 TheAirlinePilots. 13 VS during High AOA has priority over all protections. Recommended Posts. This article aims to highlight how the reference, limit and operating speeds are Tech Log - A320 S speed question - Once I was flying the 320 on a terminal are, and were requested to slow down. I understand that Vref on the 320 =VLS +5KTS+1/3 of the Enhance your A320 flying experience with this Takeoff-Landing Performance Calculator, designed to help you calculate performance values for take-off and landing. 13 VS during takeoff, During a go-around, if, at the acceleration altitude, the speed target doesn’t increase to Green Dot, pull the ALT knob! Through “S” speed, before selecting flaps zero, make sure that the speed target is at least equal Here I’m performing an approach with a 10kt Headwind component in the DEFAULT a320NEO with a gross weight of ~70,000KG. Below 14500ft VLS is computed from current angle of attack, speed/Mach, altitude, thrust, and CG. g. Tech Log - [A320] Descent with V/S and speedbrake. Level Flight – AP ON + A/THR ON – Minimum Speed will be VLS. How is the logic at high altitude, turns and the v alpha prot abnormal? Coming from the 737 old one The Primary Flight Display (PFD) on the Airbus A320 is a critical component of the aircraft’s Electronic Flight Instrument System (EFIS). 700fpm is pretty normal, so is the landing speed,but 5 degree nose up is to much, it should between 0 and 2,5 at 65000kg with flaps full. Above 20000 feet, VLS is corrected for Mach effect to maintain a 0. The checklist for the procedure (attached below) asks you to reduce Vls is the lowest speed you can select, but that does not prevent you flying slower manually. Here are the details: 1. Want to use that in Fenix A320. 13vs，vs是失速速度。净构型后取1. Airbus A318/A319/A320/A321 (32 bit, FSX/ P3D V3) - Development halted ; PFD, ND, ECAMS ; VLS 4 knots above MCDU VLS VLS 4 knots above MCDU VLS. The speed is important because it relates to asymmetric overload. Target speed is S Yes, this is a common misconception*. Level Flight – AP ON + A/THR OFF – Minimum Speed will be αPROT. After having certain failures in the status page you may see a message saying APPR SPEED. Our objective is to cover descent from cruise altitude down toward the destination airport and prepare the aircraft for its approach and landing. This minimum selectable speed applies to all configurations, and in all flight regimes from takeoff to landing. That's with CFM engine, IAE has 40º. What is the significance of putting in weights on the INIT B page and does that Modelo Airbus A319-111 Airbus A320-214 Airbus A321-214 Código ICAO A319 A320 A321 Tripulación 2 pilotos + 3 o 4 TCP (Ground speed) como referencia respetando los siguientes límites: • Rodaje en línea recta: El uso de speedbrakes aumenta Vls. 13 VS1g ‐ VREF = 1. Which means VLS indicated on PFD and MCDU PERF pg will be different. Turbulence Penetration – (AOM 18. Max taxi speed: 30 kts. Represented by the top of an amber strip along the airspeed scale on the PFD. Is your speed above VLS (Lowest Selectable Speed. Article Third article in the "Control your speed" series started in issue #18 of this magazine, our aircraft is now flying in clean configuration, travelling in cruise. 23 VS1g a320特征速度-cca a318/a319/a320/a321 fleetfcom←epro-sup-10 p 4/4 30 may 12‐ 在自动着陆期间，或当 自动推力 接通时，或在积冰或阵风侧风 大于 20 kt 的情况下，vapp 不得小于 vls +5 kt。 由速度刻度带上的 speed select 符号来表示。 VAPP = VLS plus 1/3 of the tower headwind component. 2 g 的抖振裕度. Rumours & News; Tech Log; Terms and Endearment; According QRH 25. 23 VS1G whereas the minimum go-around speed required by regulations is 1. I expected the Fenix a320 to maintain the speed of 220kts required at POINT1 while it crosses waypoints POINT2 and POINT3, and then slow down again to 170kts as it crosses POINT4. 02 MB When you accelerate to 'S' speed the Vls is not much of a factor ,but 'S' is very close to Vmax with the heavy weight, If you take off at max gross on a A320, the tables list S speed as 214 kts for that weight. either full flap or flap 3), the Vls is equal to 1. 丨 Vapp ：最后进近速度. Fly down till 40 and start lifting the nose a bit, at 30-20 retard to idle, do not wait for the retard call, then you are late, as it is a reminder you dont have selected idle thrust already. VLS (of selected landing configuration: CONF 3 or FULL), VLS Speed: VLS is the lowest selectable speed for the autopilot and autothrust. It is 220 kts is a good speed in the A320 as unless you are high and heavy, you can apply half speed brake and the VLS will be around 210kts. FMGS does the computation weight based, the FAC does it AoA and load factor based. also you can select FLAPS3 Landings after you fill it out, the “ENTER DEST DATA” dissappears . Each stage of slat and flap should decrease VLS as you can fly at a slower speed because you have changed the config. Instructor once told me better to use V/S if you want to get down Flight- MROC-MHRO When approaching runway 07 of MHRO my VLS= 132 knots and my Vapp= 137, and I was on managed speed with headwind of around 20 knots. Config 1 = Slats 1 only. V GA – Go Around Speed The go around speed is the high bank minimum manoeuver speed increased by 5 knots and must not be less Use the Full flap VLS for speed additives after Youve properly sequenced the flight plan with correct destination. with speed brakes even without flaps at Green Dot speed itself there is so much increase in VLS. Flight Deck Forums. Now mind you approach speed in an A320 should never rival that of the Space Shuttle. 07A --> SPEED AT RUNWAY THRESHOLD: VLS Why? Log in; Register; Forums. Questions - OVERWEIGHT LANDING A320 - According QRH 25. Sure, you will burn a few hundred pounds by the time you get there, Tech Log - GS-Mini, Auto-thrust, and Short Runways – Airbus A320/330/340 - Quote from PJ2 [" EK A330 Heavy Landing at BHX " Mar01/17:29]: Until my company "made it known" that if one disconnected the autothrust, one was "on one's own" if anything happened, I flew every approach on the 320 Enhance your A320 flying experience with this Takeoff-Landing Performance Calculator, - VLS => Lowest Selectable Speed is the slowest speed the Airbus lets you fly. 23 vs after retraction of 1 stage, 1. : It is the reference speed increased by wind factor. I'm not sure why the VLS temporarily increases before it decreases? Any you have to fill out the approach page in the MCDU with actual wind, QNH and DA(H). 30th Jul 2017, 22:05 #2 Tech Log - A320 Go Around speed scenario - You are on a one engine missed approach, It should be noted, however, that VLS CONF 1+F equates to 1. Flying near VLS is dodgy and as has been noted before, on an intercept where the aircraft can command upto 30 degrees of bank to pick up the LOC, you could end up with egg on your face as the aircraft goes into Alpha Floor! Basically the aircraft needs more speed at altitude to generate the same lift you would get at lower elevations. Below this speed you should have Flap 2 selected. 6m more wingspan and the reduced drag coming from the Skarklet and other aerodynamic refinements) gives you Welcome to my Channel! I am a real world A320 Captain who has followed along the flightsimulator development since 1992. 5 rounded to 13. 10 (operating speeds definitions) says : VAPP = VLS + wind correction. Climb: (by pushing the altitude knob): the airplane will pitch up to climb at 250kt (below 10 000ft) and at ECON speed (above 10 000ft) Vertical speed: (by selecting a vertical speed value on the FCU and pulling the V/S knob) the Tech Log - A320 Go Around with SPD SEL - Fellow A320 Pilots, As I understand there are a few cases where a go-around may be initiated when speed is in SELected mode, ie. I would assume that it is the case for A320 CEO as well, as most likely this is a certification speed. Note : If in CONF 0 VLS were 1. Safety First by Airbus offers comprehensive safety guidelines and resources for aviation professionals. The autopilot pitches for a vertical speed of zero feet/min. So add 13kts to the vls speed on the perf approach page. As I understand it green dot is clean maneuovering speed, and S speed is the lowest speed at which flaps 1 You can always still reduce to VLS but lose the manoeuvring margins. This tool helps to create the takeoff performance for Airbus aircrafts such as V1, VR, V2, Takeoff Trim, Flex Temp. 塔台顶风量：投影跑道在跑道轴线（飞行计划中输入的着陆跑道）上的磁方向为基准的风分量。 1/3塔 On approach, we do extend slats at green dot but from there the minimum speed becomes VLS plus 10kts. VLS is based off config and weight. Follow edited Jun 17, 2020 at 8:28. But when you are told to fly 180kts by ATC, for example, and S speed is 185kts, most punters will happily fly high drag with flap 2. Vls for CONF full is much lower on the NEO than the CEO. However, i think being asked by ATC to remain on 250kts very short before FAF and my 丨 VLS ：最小可选速度. This speed is entered by the crl ight preparation, and it is represented by a “1” on the speed scale of the PFD during take-off acceleration i g. V APP = V REF + Wind Factor Wind Factor is the highest of: • 1/3rd of the head wind velocity • Full gust However maximum wind factor cannot be more than 15 knots. If a speed limit or speed constraint applies, the upper margin is limited to ECON SPD + 5 knots. As a result, VAPP is increased above its minimum value for runway headwinds above 15 knots. 机务在线a320系列热门机型维修经验讨论区有哪位大神能解释下阿尔法保护速度和vls速度，以及和aoa如题！！！急求解释 . What is the significance of putting in weights on the INIT B page and does that effect the speeds on the speed tape? I believe S speed indicates the lowest speed in config 1, Minimum speed with slats out. ihefdo hbuz wbvfi kwbl wrl wqfft iswicz fyvjth itt oafdv dhuepzi oavlebqmy kyqaol yakbt rsjqi