Why do pilots call out SPEEDS?!

  • Am Vor 9 Monate

    Mentour PilotMentour Pilot

    Get 20% discount on the yearly subscription of Brilliant by using this code 👉🏻 brilliant.org/Mentourpilot/

    Have you ever watched a cockpit video and heard the pilots call out "V1, Rotate" during the takeoff roll? In this video I will give you amuch deeper insight into the meaning of these calls and how they are calculated. As always I would love to hear what you think about the video and what other questions you would like me to cover in the future. Leave me a comment in the comment section below and make sure you have subscribed to the channel!

    Now! Come in to the Mentour Aviation app and discuss what You think about this! Download the app for FREE using the link below 👇
    📲 www.mentourpilot.com/apps/

    If you want to support the work I do on the channel, join my Patreon crew and get awesome perks and help me move the channel forward! 👇
    👉🏻 www.patreon.com/mentourpilot

    I have also created an Amazon page with Aviation books, material and flight simulator stuff that I think you will enjoy!
    👉🏻 www.amazon.com/shop/mentourpilot

    Follow my life on instagram and get awesome pictures from the cockpit!
    📲 instagram.com/mentour_pilot

    Below you will find the links to videos and sources used in this episode. Enjoy checking them out!

    Topfelya - Wet takeoff
    de-film.com/v-video-QnQO1IQzjQ0.html

Mentour Pilot
Mentour Pilot

Get 20% discount on the yearly subscription of Brilliant by using this code 👉🏻 https://brilliant.org/Mentourpilot/

Vor 9 Monate
Michael B
Michael B

I never heard of these V speeds until I started watching these heavy drama YT shows. Explain the stuff that’s really important, like Vy, Vx, Va, Vfe, Vne … getting those wrong may result in rapid unplanned disassembly of you and your aircraft ;)

Vor Tag
tatiana kerina tarp
tatiana kerina tarp

Yes I want a t-shirt!

Vor 2 Monate
theothertroll
theothertroll

They can now let me fly the plane because I’ve been to YouTube university !

Vor 2 Monate
electrical
electrical

How do you guys know the take off speed when the aircraft is fully loaded ?

Vor 2 Monate
Victoria Pritt
Victoria Pritt

Will someone let us know how and where we might purchase the T shirt shown in this video. It is titled Boeing ...

Vor 3 Monate
Larrymmcclain
Larrymmcclain

What does the "V" stand for, I don't remember hearing the explanation? Velocity comes to mind now that I asked the question.

Vor 3 Monate
Dani Biro
Dani Biro

The dogie is chill as a coma

Vor 3 Monate
road runner
road runner

thankyou for the best most through explaination of the v speeds!! i now can totally understand it now!! great great video!!

Vor 4 Monate
GWR Productions 2014
GWR Productions 2014

remember lads the 3 most useless things in the world are; 1) the runway behind you, 2) the altitude above you & 3) the fuel you didn't put in the tanks

Vor 5 Monate
Jon Pilot
Jon Pilot

Pitch for Vy.

Vor 5 Monate
kerry evans
kerry evans

Hello mentour pilot from a sunny North cyprus.

Vor 5 Monate
Elishama John
Elishama John

WHY DOES THE PILOT MONITORING CALLS OUT V1 IF THE AIRPLANE CALLS IT OUT AUTOMATICALLY?

Vor 6 Monate
Hassan Hendawi
Hassan Hendawi

I really love the new intro!

Vor 7 Monate
William Huang
William Huang

Awesome new intro

Vor 7 Monate
Hans Bogaerts
Hans Bogaerts

I was surprived that VLO is also used for liftoff speed. I knew it as maximum landing gear operating speed though I've always flown aircraft with fixed gears.

Vor 7 Monate
ZK-APA
ZK-APA

VLOF is actually lift off speed. VLO as you said is landing gear operating speed.

Vor 2 Monate
Glenn Osmond
Glenn Osmond

9:08.... I looked behind me....

Vor 8 Monate
Zweitkanal
Zweitkanal

Fantastic new intro

Vor 8 Monate
Trevor Rund
Trevor Rund

HIS INTRO IS FINALLY A 737!!!

Vor 8 Monate
Greg Bloomfield
Greg Bloomfield

...danke, Peter...very good instructor you ARE...yet the soothing sound of your voice has, clearly, put your dog to sleep...der name ihres hundemaskottchens??? ...too cute...

Vor 8 Monate
Radu Stirbu
Radu Stirbu

I think that the definition of V1 here is not correct. Let us assume a runway of a given length and two very different aircrafts, let's say a 737 and a DC-3. If V1 is the last speed at which you still have enough space to stop the plane, let us assume that the 737 reaches this V1 at one specific point on the runway. The DC-3 however needs far less speed to be able to take off and thus, a much shorter distance to be able to be stopped. So, by this definition, the V1 of the DC-3 should be reached closer to the end of the runway, because it needs less distance to be able to stop. On the other hand, as the DC-3 needs less speed to take off, it means that it might reach the take off speed before it reaches the critical point on the runway that corresponds to its V1. Sooooo...would it be rotated before V1? Or is this definition of V1 not accurate?

Vor 8 Monate
davel l
davel l

V stands for Votes. V without a suffix is the number of votes in a normal election. V-lo, or V-Dirty, is vote tally with maximum Fraud extended. V-a, or maneuvering vote tally, is less fraud than V-lo, but designed to seem not so "abrupt" to cause alarm to voters.

Vor 8 Monate
Chaydex
Chaydex

Does anyone have that Mentour Pilot livery for FSX?

Vor 8 Monate
Oliver Neukum
Oliver Neukum

So, on a very long runaway Vr And is V1 calculated on the assumption that thrust reversers are not available?

Vor 8 Monate
Lukasz GG
Lukasz GG

Had the same question :) I'm assuming it doesn't make sense then because you're already in the air, except the short time between Vr and actually taking off. Small aircraft can easily do a few touch and go's on a long runway.

Vor 8 Monate
Andrew Storm
Andrew Storm

Why does a pilot use air brakes and not just reduce thrust when on finals

Vor 8 Monate
John Glasgow
John Glasgow

air brakes far more effective and quicker

Vor 8 Monate
Atlas1021
Atlas1021

Woah, I love the new intro dude!

Vor 8 Monate
Blue Sioux
Blue Sioux

I can't concentrate-the room is tilted w/o the other dog on the other side of the couch! 😀

Vor 8 Monate
Omar Aguilera
Omar Aguilera

I rather this kind of videos instead of the news. It’s always great to know more about the operation of the aircraft.

Vor 8 Monate
Thomas Dalton
Thomas Dalton

Your explanation of that chart doesn't make sense. The lines can't move when mass changes, since mass is one of the variables you are plotting against. It also doesn't make sense to say the intersection point is the V1 for a particular mass for the same reason. I think the correct description of that chart is that V1 for a given mass is the lower of the two lines. For a low mass, it is where the go line is for that mass. For a high mass, it is where the stop line is for that mass. The intersection point just tells you the mass at which the go speed and the stop speed are the same, but that's not particularly important to know (since you don't control the mass).

Vor 8 Monate
mrarch
mrarch

V speeds are very interesting especially when u graduate to multi engine higher performance aircraft. Any one V speed can be critical to flight and or managing emergencies. Vzrc was particularly determining with the Concorde accident in Paris and makes for fascinating reading regarding a/c performance.

Vor 8 Monate
kelvin mwalili
kelvin mwalili

Mentour Pilot.,please respond 👇👇 What's the effect if jet engine fan blades were connected by a ring at the far circumference , could it help to strengthen the blades or will it reduce efficiency..

Vor 8 Monate
Bob Barker
Bob Barker

I have a few questions. Given that the weather is clear and you have a clean and dry runway, what determines V1 more? Is it speed or or how much runway remains or is it both? Also, are pilots also aware of what types of terrain or obstacles/barriers/hazards are beyond the threshold at the end of the runway. Are they provided that information prior to takeoff? Have you ever flown a plane that was so heavy at takeoff that your plane reached a point on the runway where you were committed to takeoff long before reaching V1? In other words, past the point at which you could stop the plane within the length of runway remaining. I have seen a great many air crash videos on Youtube and it seems all airports and runways are different. Some have fields, trees, beaches, fences, freeways and oceans beyond their thresholds. One video I saw about a plane with a fuel leak called Flying On Empty that was heading for Portugal had to divert to an island in the Azores called Terceira and the runway they landed on with no engines had a shear cliff at the end of that runway that dropped off into the Atlantic. Scary stuff. I enjoy your videos. They are very informative.

Vor 8 Monate
Jacob Cornelius
Jacob Cornelius

So say you have a tire blow out late in the takeoff roll wether it’s right before V1 or after.....would you still continue the take off or reject? With that said, if you do continue do you turn around and go back or just continue to the destination and land and deal with it then?

Vor 8 Monate
TheRantingCabby
TheRantingCabby

"I could've had a V8."

Vor 8 Monate
Bryon Slatten
Bryon Slatten

Your dog is NOT an aviation buff.

Vor 8 Monate
John Airey
John Airey

A runway excursion sounds like an exciting day out. Reminded of flight BA38 on 17 January 2008 - the most expensive lawnmower ever used at Heathrow!

Vor 8 Monate
Ratanak SOKUN
Ratanak SOKUN

Much appreciate and i really love your new intro sir

Vor 8 Monate
Oody Kaywan
Oody Kaywan

Your dog is so cute. Your video clip is very useful.

Vor 8 Monate
James Sue
James Sue

Thank you.😀. So you do ( not -> don't ) "Have to be a rocket scientist" to fly an airplane. Lol (figuratively speaking)

Vor 8 Monate
MrKal321
MrKal321

At 7:50 the graph shows a linear relationship between speed and mass. Kinetic energy is 1/2mv^2, so this doesn’t make sense to me

Vor 8 Monate
Marc McReynolds
Marc McReynolds

You aren't alone -- that graph needs a do-over. If I (or someone else who's had experience with V1 matters) can figure out a way to salvage the attempt, I'll post and maybe it will get pinned. As for what's there now, it is true that the relation between V1 (unfortunately the graph is just labeled "speed") and mass would be "monotonic decreasing" as is depicted, though as you point out presumably not linear. Nor any other simple math relation: I used to run a computer program for stopping distance calculation which time-step integrated through a host of nonlinear contributing factors such as drag, speed-dependent braking coefficient, and when applicable spool up/speed-dependent reverse thrust for a given EPR or N1 thrust setting... and that was just the "braking distance" part of the larger accelerate/stop scenario which determines V speeds for a given set of aircraft and external conditions (runway length, runway slope, air density, wind vector).

Vor 8 Monate
Aaron Seet
Aaron Seet

Why say an ambiguous "rotate" instead of a more specific "pitch up"?

Vor 8 Monate
Bawxxy
Bawxxy

ICAO: We need to make things easier to remember and communicate Also ICAO: Here are our 46 V speeds

Vor 8 Monate
77thTrombone
77thTrombone

@Jason Hackney ah, yes. I have immediate ideas, but will only observed that certain languages seem remarkably more prone to issues of "concepts that don't translate well" than others. That trait could be considered a form of technical security. Happy flying!

Vor Monat
Jason Hackney
Jason Hackney

@77thTrombone They did not and I did not ask. However, the primary language of this manufacturer is not English and the translated books, while not as bad as they could be, are riddled with spelling errors and concepts that don't seem to translate well to English.

Vor Monat
77thTrombone
77thTrombone

@Jason Hackney did the manufacturer ever provide a good reason for distinguishing itself that way?

Vor Monat
Jason Hackney
Jason Hackney

I just got into a new type a couple years ago. The plane has all the basic systems that any other transport category aircraft has with the exception that the manufacturer decided to rename and re-acronym EVERY. THING. That first check ride was quite a test!

Vor 7 Monate
Luke
Luke

Is your son going 2 be a pilot? 😁

Vor 8 Monate
HiiighAsAKite
HiiighAsAKite

New intro, who dis?

Vor 8 Monate
Erik Hendrych
Erik Hendrych

Are V1, V2, Vr etc. CAS or TAS?

Vor 8 Monate
Marc McReynolds
Marc McReynolds

IAS (Instrument AIr Speed).

Vor 8 Monate
Erik Hendrych
Erik Hendrych

8:27 When the weight changes the lines are going to move and the intersection is going to move. I am seriously confused. The changing weight should be already be accounted for in the diagram. There is no need to shift the lines. Unless weight and mass mean very different things (I know weight is technically a force but it shouldn't really matter in this case).

Vor 8 Monate
Marc McReynolds
Marc McReynolds

The chart isn't right, to put it simply. So far I'm nearly a day into head scratching with still no answer as to how better to represent what he is trying to depict. In reality there are a lot of interacting nonlinear factors which go into either of the lines, but perhaps something which at least illustrates the interplay between mass and V1 can be concocted (or already exists somewhere else, and whoever finds it can share the link?).

Vor 8 Monate
Ted Ferkin
Ted Ferkin

I would imagine that under most cases V1 is well before Vr. However, if the plane is lightly loaded, is it possible Vr could end up being below V1?

Vor 8 Monate
Marc McReynolds
Marc McReynolds

Yes, but as a matter of procedure V1 is taken to be at Vr in such a case -- no rotating and then changing your mind... unless the aircraft is believed to have become no longer airworthy. In that case RTO and hope for the best, same as for any RTO after V1.

Vor 8 Monate
migga86
migga86

Visible at 12:43 is my favourite speed of the list: VWWO - Maximum windshield wiper operating speed. My other two favourites are visible at 12:14 VLLE (Maximum landing light extend speed) and VLLO (Maximum landing light operating speed). "You want to go a certain speed? We got a V for that." The best description however goes to the VLO visible at 12:16 : "In an emergency involving loss of control - when the ground is getting close and the airspeed is quickly approaching redline - forget about this speed. Throw the gear out!" Some of these speeds are awfully specific or simply plain weird: 1. VDEC - Multiengine piston and light multiengine turboprops accelerate/brake decision speed. Doesn't this collide with V1? 2. VENR - En route climb speed with critical engine inop 3. VFS - Final segment jet takeoff with critical engine inop 4. VMCA - "Most critical" engine inop, 5 degrees of bank, gear up, flaps up and so on. I didn't know there is a "most critical" definition. Critical is usually the highest form of failure.. 5. VMCG - Minimum ground control speed not using nose wheel with engine failure during takeoff roll for jets, turboprops and transport category aircraft 6.VMO/MMO - Maximum speed before top side barber poles reach your current speed, depending on wing design 7. VS1 - This is the clean stall speed (gear and flaps up), although "clean" is up for debate 8. VSSE - Minimum safe single-engine speed for multi-engine plane for training 9. VTOSS - Category A rotorcraft - that type is only mentioned this once in the whole list I just wonder why they don't have a V35D: Speed at which a 35 degree bank angle will not cause more than 500 feet per minute sink rate. Or maybe add a VML: Maximum landing speed at which the tires with regular pressure at 500 feet above MSL have a 20% speed margin to exploding. I do hope, my ficticious speeds will not be added to the ICAOs list and asked at any ones flight exam :D

Vor 8 Monate
ilovevegimite
ilovevegimite

With all the computers on board aircraft now, do the pilots still have to work out the V1 speed or do they just enter the relevant data into the computer and it tells them the V1 speed?

Vor 8 Monate
Logan K
Logan K

Hello I have a question What tips do you have for young people like me in becoming a pilot and what age do you think I should start flight school?

Vor 8 Monate
JochemvdOuw
JochemvdOuw

That intro!!!!!

Vor 8 Monate
Ahmad The Aviation Lover
Ahmad The Aviation Lover

Damn!!! I love your intro mentour pilot looks very futuristic and sci fi

Vor 8 Monate
Jamie Browne
Jamie Browne

Oh wow u ditched the B777 in the intro

Vor 8 Monate
crashzg
crashzg

Funny, I always thought that common symbol V for speed in physics is from 'velocity' and not from french 'vitesse'.

Vor 8 Monate
Bahdiyar Ozbay
Bahdiyar Ozbay

The new intro is looking good

Vor 8 Monate
Marbleous Mel
Marbleous Mel

My question is about the V1 decision. I watched a video last week about a commercial passenger plane which had the landing gear break and catch fire either just before or about V1. The pilot continued the takeoff, pulled the landing gear up, and brought the fire into the fuselage. In that situation, is it better to have the runway excursion since you know you have a landing gear failure and fire or is it still proper to take off because you have reached V1?

Vor 8 Monate
Marbleous Mel
Marbleous Mel

@Marc McReynolds Thank you do much! I understand much better now.

Vor 8 Monate
Marc McReynolds
Marc McReynolds

@Marbleous Mel > It just struck me as odd that you would take off with a flat tire because of the problems it might cause on landing. People tend to think of landings as harsh on the tires, but by the numbers it's actually the takeoff roll... at least for apples-to-apples comparisons like a MTOW takeoff compared to a MLW landing. There are several factors which contribute to that: * The vertical load imposed on the tire is higher for longer during the takeoff, both because of the higher aircraft mass and because at touchdown the wing is still supporting most of the aircraft's weight until after the spoilers deploy. The tire isn't getting as much punishment as it might appear. * Speed is higher at takeoff, which stresses and heats the tire more. * The tire is cool (ambient) at landing, but can get hot from flexing along its side during a long taxi and then even more as speed increases during takeoff. Especially true if the tire is underinflated (more deflection = more sidewall flexing = more heat-- same as with a car tire but airliner tires operate at twice the deflection and have thicker cross sections, so much more heat buildup can occur). Add all the above up, and continue takeoff/return for landing (after getting weight down some) is certainly an option, though there is no clear cut winner. If I were at the controls, I think I would have it in mind as a matter of pre-flight planning that if my V1 is at or very close to Vr, continue with the takeoff. If several more seconds are involved, however, then RTO mindful that the failure of one tire increases the chance its companion will fail prior to takeoff [edit: , as happened with 2120. While a dual tire failure over the course of an RTO stop is bad (increases stopping distance, though there is some margin built into the flight manual numbers), landing with two failed tires on the same side is probably worse.]

Vor 8 Monate
Marc McReynolds
Marc McReynolds

@Marbleous Mel "they thought they had a flat tire [yet continued the takeoff roll], hit [V1] and called for [rotation] anyway"? 2120 was a weird one. They were barely past 60 kt and already suspecting a flat tire, yet kept on going. The Saudi report tried to excuse the crew in that regard, taking the position that they weren't trained to abort for a flat, but people don't even drive their cars that way (detect a flat while still at low speed on the freeway on ramp, and continue to accelerate instead of pulling over to the side?) Below 80 kt, you RTO (at a mild level of braking) for just about anything. The problem (tire failure) apparently happened at around only 50 kt, which is another way of saying that was one underinflated tire. The ground crew knew about it, but elected to ignore rather than remedy because the flight would have been delayed waiting for a nitrogen bottle. Tires are as highly engineered as any other critical structure, and departing with an underinflated one is like noticing a crack in the airframe but deciding not to worry about it.

Vor 8 Monate
Marbleous Mel
Marbleous Mel

@Marc McReynolds I will say the video is clear that low tire pressure wasn’t considered a reason to reject take off, and that plane had no fire detector in the landing gear assembly. It just struck me as odd that you would take off with a flat tire because of the problems it might cause on landing.

Vor 8 Monate
Marbleous Mel
Marbleous Mel

@Marc McReynolds It was Nigeria Airways flight 2120. I went back and looked for the video. It appears they thought they had a flat tire, hit 80 knots and called for V1 anyway. The problem started when they released the breaks, so they had time. Spinning that scenario a bit, if a pilot assumed a flat tire at V1, I take it from your prior reply they would still take off? I’m not sure how much of a crash a flat tire would cause on landing.

Vor 8 Monate
Ranger Rick
Ranger Rick

Ok - quick questions - 1.) For the 737 (under average load and good dry weather conditions) what is the max speed one can deploy / retract speed brakes? 2.) How about max speed to deploy / retract landing lights? Never hear that online and I wonder when damage occurs.... 3.) If one has a very long runway and distance permits, is it better to continue accelerating past VR to give the plane more energy (and thus an easier time lifting), or is there some calc / condition that occurs which makes VR the best time to rotate / begin VLO? Always wondered about these things but often you don't hear much on real pilot videos on this. I just want the sim experience to be as real as possible.

Vor 8 Monate
Ranger Rick
Ranger Rick

@Marc McReynolds Ah. Makes sense. Thanks.

Vor 8 Monate
Marc McReynolds
Marc McReynolds

It should be able to lift fine by V1. Note for example that V2 can be close enough to V1 such that in some cases V2 is achieved prior to the tires breaking contact with the runway. V speeds are calculated with the certified tire speed limit in mind, so randomly remaining on the runway while continuing to accelerate could run afoul of that constraint in some scenarios. The last part of the takeoff is also the most severe on tire heating, so the tire(s) could alternatively fail from overheating if a takeoff is significantly extended at "corner of the chart" conditions such as MTOW / high altitude.

Vor 8 Monate
Tubluer
Tubluer

So Petter where do you get those permasnooze dogs?

Vor 8 Monate
Oskar Kleemann
Oskar Kleemann

Peter, great new intro you got there!

Vor 8 Monate
Ted Burnard
Ted Burnard

Like the new style intro. Good to see you featuring a 737 instead of a 777.

Vor 8 Monate
anggrimunki
anggrimunki

I get the feeling this channel will be a good resource for me over the next year. Thanks. Subbed.

Vor 8 Monate
Keenan Henry
Keenan Henry

Ooooooo 😯😯😯😯 I love the new intro! Good job Petter 👍🏽

Vor 8 Monate
Bones T
Bones T

Omg 🐶♥️

Vor 8 Monate
h3 rotor
h3 rotor

Thank you very much for this. List is V speeds . . great! My first experience in light and heavy lift military helicopters. Later to light and transport category military and civilian fixed-wing. Interesting contrast between rotary-wing and fixed-wing procedures. Fortunate to live both.

Vor 8 Monate
Johan M
Johan M

If you abort the take off after V1 can you use taxiways to extend the braking distance you have? Often you have a few exit taxiways towards then end of the runway and I imagine you can use them to have the full distance off the taxiway exit and the rest of the taxiway asuming there is no aircraft there. Also - When I flew aircrafts like 737 and A 320 from Arlandas longest runway (about 3300 meters) it seems like the pilots often take longer time to rotate than when taking off from shorter runways. Does that mean you have an advantage to continue to accelerate above youre normal rotate speed if you have enough runway to safety do so? Johan.

Vor 8 Monate
Marc McReynolds
Marc McReynolds

@Johan M Airliners routinely do use reduced-thrust settings when sufficient excess runway is available. That's favorable to engine economics, but not the landing gear (tires, specifically -- the rest of the assembly doesn't care). Note that using reduced thrust is not as safe as a normal takeoff, because there won't be excess runway available which might have come in handy (e.g. multiple tire failures causing stopping distance to increase substantially). V1 calculations are based around the scenario of an engine failure (way back when the standard was developed engines were far less reliable). But a tire failure is probably more likely nowadays, and if one fails the likelihood of others around it failing goes up.

Vor 8 Monate
Johan M
Johan M

@Marc McReynolds Thanks for the answer. With that in mind - Could the pilots use a slower acceleration rate to save wear and tear on engines and gear when they have a longer runway? That would give the same impression I guess? Johan.

Vor 8 Monate
Marc McReynolds
Marc McReynolds

Even "high-speed" turnoffs are I believe limited by a rated turnoff speed of 60 kt. On a non-dry runway, you might not even get that. They are located far enough before the end of the runway that for a high-speed RTO using maximum decel, the aircraft's speed going past the last one would still be well over 60 kt. Staying on the runway well past Vr exposes the tires to a lot more heat buildup, especially for a takeoff near MTOW where the tires are deflected to their rated deflection (more deflection equals more sidewall flexing as the tire rolls equals more heat equals less strength). The increasing heat plus increasing speed (and tires are only rated to a certain speed) would make post-V1 [edit: post-Vr] tire failure more likely.

Vor 8 Monate
Dolfy Rants Parodies
Dolfy Rants Parodies

Am I the only one who paused and read all the v speeds?

Vor 8 Monate
Streamtronics
Streamtronics

new intro is cool, the camera movements could be a little smoother tho. It kinda feels like linear keyframes and not organic movements.

Vor 8 Monate
tombexhill
tombexhill

Thank you for your brilliant videos. They are so easy to binge watch!

Vor 8 Monate
rambo1152
rambo1152

I was expecting a widiopodcast. What happened to my widiopodcast?

Vor 8 Monate
aviator boss
aviator boss

great intro and video

Vor 9 Monate
adb012
adb012

Mentour, I don't know if you did it to simplify the message, but there are a couple of misconceptions in this video. 1- V2 is not the best climb angle speed, or the best-anything: it is barely a safe climb speed, a speed that meets certain controllability requirements and that ensures a certain minimum climb gradient with one engine inoperative. That is why It is required that if you decide to continue the take-off after an engine failure at V1 the plane must be able to achieve 35ft AND V2 over the departure threshold (or the clearway if there is one). You mentioned the screen height but not V2 as part as the requirements when defining V1. 2- V1 is not necessarily the latest speed where you can start rejecting the take-off and stop on the runway, nor the soonest speed where you can continue the take-off after an engine failure. V1 is rather a speed SELECTED BY THE OPERATOR within a range of speeds that meet that criteria (unless the take-off weight is runway-limited). There is ONE value of V1 which is called "balanced field V1" that makes the ASD (accelerate-stop distance) equal to the TOD (take-off distance after an engine failure or 115% of the take-off distance with no engine failure, whatever is greater, in both cases with the requirement of achieving 35ft and V2). That ASD=TOD is called the balanced field length, and it is the minimum runway length from which the airplane can operate in these conditions (weight, wind, density altitude, etc...). If the runway is longer than the balanced field length, then there will be a range of speed that meet the V1 criteria and the operator has to choose one within that range, although the practice of performing reduced-thrust take-offs can offset the excess runway available (with a lower thrust you will have both a longer TOD and a longer ASD) and runway length is one of the limiting factors of how much the thrust can be reduced in a reduced-thrust take off (you can reduce it up to the point where ASD = TOD = runway length, assuming no clearway and no stopway or a clearway of the same length as the stopway).

Vor 9 Monate
VARIABLE 2.0
VARIABLE 2.0

I liked this comment just because of how long it was. Nice story book

Vor 8 Monate
Home Home
Home Home

Money are s***t now not only in aviation, but too much advertisement in this video :/

Vor 9 Monate
Ernesto Mayer
Ernesto Mayer

Can you make a video about EICAS?

Vor 9 Monate
Julius Caesar
Julius Caesar

IS IT LEGAL FOR ONE AIRLINER TO CONVERSE WITH ANOTHER REGARDING WEATHER OR SAFETY ISSUES?

Vor 9 Monate
Aviator_Canaan
Aviator_Canaan

i love the new intro!

Vor 9 Monate
Jersey Shore Drone Services
Jersey Shore Drone Services

So the heavier the plane is the faster you have to go to take off but you have to decide if you're not going to take off at a slower speed. Seems like physics kind of working against us in this case 🤔 I think as the weight of the aircraft increases the length of the required runway increases not proportionally but probably exponentially.

Vor 9 Monate
VikramJeet Das
VikramJeet Das

Um, sorry, but the SE-RSA in the intro is an Airbus A350 and not a 737 :|

Vor 9 Monate
Robert Lombardi
Robert Lombardi

Mentour question when you are rotating aircraft off runway why is the yoke being turn left or right and not being kept straight in line with runway during take off ??

Vor 9 Monate
Laredo Benjamin
Laredo Benjamin

Noooo !!!! I miss the 777 of the intro so much !!!! 😭

Vor 9 Monate
John Snyder
John Snyder

Put the motion on next time

Vor 9 Monate
Aksham Tuteja
Aksham Tuteja

How did you make the animation after you said stay tuned? That animation part was very cool

Vor 9 Monate
John Mazur
John Mazur

It's probably me,, but, 'rotate' seems to be the wrong word. I think 'rotate' to me, means a left/right motion. The physical motion is up, not rotate left or right. I know it's the standard way to describe this motion, but it doesn't feel right.

Vor 9 Monate
John Mazur
John Mazur

@XineasHD Thanks for the insight.

Vor 8 Monate
XineasHD
XineasHD

Not a strange thought at all, but the rotation terminology is used because the aircraft pivots around the main landing gear axis, as if you're looking at the plane from the side.

Vor 8 Monate
H.C. Nagaveni
H.C. Nagaveni

love the new intro !

Vor 9 Monate
MIGs Yesterchips
MIGs Yesterchips

Whow!... An altered Intro-speech? Something wrong, Petter? ;)

Vor 9 Monate
Adelchi Pelizzo
Adelchi Pelizzo

Why 35 ft ?

Vor 9 Monate
Patrick Monks
Patrick Monks

Very nice explanation

Vor 9 Monate
Jorge Angulo
Jorge Angulo

That new intro!!!!!

Vor 9 Monate
Macentropist
Macentropist

Brilliant explanation Petter! I always thought V1 was the calculated speed you needed to achieve based on weight of plane, wind speed, air pressure and temperature, at least that is how i was trained 35+ years ago when i was getting my PPL, or are we using the same terms? Love your clear, sanguine and vocal intonation, truly amazing, would fly on any plane you were left seating with utter confidence.

Vor 9 Monate
Panagiotis El Sisi
Panagiotis El Sisi

That dog pillow is very life-like!

Vor 9 Monate
Eddie Harkin
Eddie Harkin

Can't believe I went back to look D'oh! 🤣

Vor 2 Monate
Eric Martindale
Eric Martindale

Dogs just feel super relaxed & comfortable around him. Cesar Milan may be the "Dog Whisperer," but Mentour is the "Dog Tranquilizer."

Vor 4 Monate
Thabang Monnakgotla
Thabang Monnakgotla

😂😂

Vor 7 Monate
cody collins
cody collins

Wouldnt you have to calculate your stop speed without thrust reversers because using only one Would spin the aircraft

Vor 9 Monate
Marc McReynolds
Marc McReynolds

On a dry runway there is plenty of directional control to handle that: Nose wheel steering, rudder, differential braking. As runway friction lessens, there is more chance of a directional control problem, but generally the lateral control available will still be adequate.

Vor 8 Monate
Wen Xuan Chin
Wen Xuan Chin

Beautiful intro!

Vor 9 Monate
thePaperDinosaur
thePaperDinosaur

Fantastic video. One of my personal favorites. I’m buying a shirt right now! Stay safe and healthy everybody

Vor 9 Monate
october
october

wow new intro!!

Vor 9 Monate
Luke Orlando
Luke Orlando

wish i could read faster. wow, that scrolled fast!

Vor 9 Monate
Dog Walker
Dog Walker

Reduce the video speed to 25%

Vor 8 Monate
burt2481
burt2481

You sell everything but your dog .I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic I hope you are doing absolutely fantastic

Vor 9 Monate
crazyluke
crazyluke

That is one sexy new intro good sir

Vor 9 Monate
John Fitzpatrick
John Fitzpatrick

Dear Mentor Pilot, I was of the assumption; Environmental circumstances with the plane performance capabilities determine v1 v2 etc. * air density * temp * humidity *wind Gravity/performance * weight *thrust * lift (mainplane) * drag All these factors contributing to the minimum distance for flight. The POH for each plane will give measurements.🙊🙉

Vor 9 Monate
CaptainKrimson
CaptainKrimson

you are a good teacher!

Vor 9 Monate
Philippus Cesena
Philippus Cesena

Thank you!

Vor 9 Monate
Adam Gawlas
Adam Gawlas

That new intro is absolutely fantastic!

Vor 9 Monate

Nächster

How YOU can land a passenger aircraft! 12 steps

31:56

HOW do Pilots ACTUALLY navigate the skies?

27:28

SMITE - The Ceaseless Whirlpool | Charybdis Cinematic

1:09

SMITE - The Ceaseless Whirlpool | Charybdis Cinematic

SMITE by Titan Forge Games

Aufrufe 192 292

TRY NOT TO GET UNCOMFORTABLE CHALLENGE!

0:23

TRY NOT TO GET UNCOMFORTABLE CHALLENGE!

Paul Foisy Facts

Aufrufe 367 663

5 Reasons why flying in Summer is HARD

22:04

5 Reasons why flying in Summer is HARD

Mentour Pilot

Aufrufe 310 000

Worst DESCEND fears explained!

21:10

Worst DESCEND fears explained!

Mentour Pilot

Aufrufe 333 000

Unstabilized Aircraft approach - Explained!

25:36

How does the Boeing 737 Bleed-air system work?!

19:27

What are those SPINNING things in the cockpit?!

21:46

Party Like A Queen! (Clash of Clans Official)

0:44

Party Like A Queen! (Clash of Clans Official)

Clash of Clans

Aufrufe 17 173 594

Aventura, Bad Bunny - Volví (Video Oficial)

3:52

Aventura, Bad Bunny - Volví (Video Oficial)

Romeo Santos

Aufrufe 12 824 265

Next Level Reynolds

1:49

Next Level Reynolds

Ryan Reynolds

Aufrufe 3 116 810

Bewerbung für Hollywood

10:05

Bewerbung für Hollywood

Hollywood Matze

Aufrufe 121 104