whether you’re learning to fly or you’re

an experienced airline pilot cross when landings are a part of our daily job in

this video I’m going to show you the mental math that I use when calculating

my cross wind component coming up 963 heavy sliding one Niner zero maintain

one zero 10,000 for only 180 left clear for takeoff

hey crew what’s going on if you’re new to the channel my name is Chelsea I’m a

747 pilot in this video I’m gonna go over the mental math that I use when I

calculate my cross wind component let’s get into it I’d like to do the math so

let me just disclose this what I want to tell you is that I did not invent these

techniques there are either things that I’ve learned with guys that are flying

with or I’ve read or studied somewhere I don’t know where I learned this specific

technique what we’re gonna talk about here is the mental math and how I use

this on a daily basis and I’m just going to give you a few scenarios here so the

very first thing you need to do is establish the difference between the

runway you’re landing on and the wind and the direction that it’s coming from

so I just take the bigger number and subtract the smaller number just to make

my life easy so in this first scenario you’re laying in runway 9 the wind is 0

4 0 9 minus 4 50 so your difference between your wind and your runway is 50

degrees pretty simple right second scenario you’re landing runway 1 8 the

wind is to 5 0 at 15 knots 25-18 7 so your difference is 70 degrees 70 degrees

from the from where you’re landing to where the direction of the wind is

you’re landing runway 3 6 windows to 7 0 at 20 knots so your difference between 3

6 and 2/7 is 90 degrees so you have a 90 degrees difference so that’s the first

thing you need to establish when you’re calculating your cross wind component

what is the difference between the runway you’re landing on and direction

of the wind so I like to keep things really simple so here’s what we’re gonna

do we’re gonna move the decimal point back or drop the zero in the case of the

direction of the wind right now we got a difference of 50 degrees

we’re gonna make that five or if the difference is 80 degrees we’re gonna

make that eight we’re gonna do the same thing for the wind the wind is 20 knots

it’s gonna be – the wind is 50 knot it’s gonna be 1.5 and the reason I do that is

just to simplify my life all right so if the difference is 20 degrees right now

it’s just a 2 you’re gonna add 2 to that make it a 4 or if the difference is 50

degrees we’re gonna make it a 5 add 2 to that 7 so you kind of get the idea here

80 degrees 8 to 10 I’ll explain to you why the 8 isn’t purple in just a second

here but what what my point is is no matter what it is whatever the

difference is you’re gonna take that make it just the base the root number so

2 or 5 or 8 or whatever it is and you’re gonna add 2 to that number so now that

you have that that that new number so 2 plus 2 is 4 now you have a difference of

4 here on the second row you’re gonna multiply the difference by the wind

so 4 times 1.5 equals 6 6 is your cross wind component 7 times 2 14 is your

cross wind component and then of course 10 times 3 is 30 30 sequestering

component so let me explain to you why I have 8 in purple here this first one if

you’re eight it means you’re 80 degrees off the tip of your wing

so you’re 80 degrees off the tip of your wing or 90 degrees off your tip your

wing or a hundred degrees off the tip of your wing essentially it is a direct

crosswind so when I when I did the math in my head and I go oh okay so it’s 80

degrees off the tip of my wing I don’t even need to do the math I just go it’s

80 degrees off the tip of the wing and then I’m gonna use that whatever that

wind is that’s my cross wind component if you’re landing on runway seats three

six the win stitute the wind’s coming from two seven zero at 30 knots there’s

no need to do math it’s it’s a thirty nine cross one that’s why I put eight

and eight in purple so if it’s eight eighty degrees or 90 degrees or even a

hundred degrees meaning it’s slightly behind the wing any of those I just use

it as just a flat that whatever the wind is

across with a component so you don’t even need to do the math on that from

7:00 and less that’s where you start to do the math I’m learning so much this is

exactly what I did so the first scenario is your your wind

is 0 for 0 10 knots you’re landing on runway 9

we got a 50 degree difference between the runway you’re landing on and the

wind the wind is 10 knots so right here I made the math real simple 5 which is

50 degrees dropping the 0 plus 2 equals 7 7 times 110 not minus the 0 so 7 times

1 equals 7 you have a cross one component of 7 I went on to an online

calculator and calculated the cross 1 component based off of this scenario to

show you what the computer spit out so here I put in all the numbers runway 9 0

4 0 Winston knots crosswind component they gave me was 8 my cross wind

component by doing in my head is 7 if you can fly one not good for you I’m

just not that good so when I’m calculating this stuff I want to get a

basic idea of what it is I’m gonna be getting into when I’m getting ready to

land that’s it at the end of the day you’re gonna fly that aircraft but this

gives you an idea of what you’re getting into let’s do another scenario now all

right your winds 2 5 0 at 15 knots you’re laying at runway 1 8 so you got a

70 degree difference between the runway you’re landing on and the win get down

here to the math 7 plus 2 equals 9 9 times 1.5 equals 14 now I’m not really

good with decimal points and Matt and multiplication on those things so what I

do in these scenarios as I go 9 is close to 10 so 10 times 1.5 is 15 and then I

just drop a naught so 14 and I just do that just to make things easy for myself

I just try to simplify everything as much as possible so this gave us a cross

1 component of 14 knots and the computer says the exact same thing 14 knots

sometimes going to be right on sometimes you might be an odd or two off again it

doesn’t really matter you just want to get a basic idea of where you’re at all

right crew this scenario is for you guys to solve yourself in the comments below

so you’re laying in runway 9 the zero six zero at 18 knots oh I made it

18 knots so you can get some real-world math here for yourself and start

practicing like what I said earlier take that 18 make your life simple round

that to 20 when you get to the end and you have your cross one component

drop a knot or two that’ll give you a pretty good idea of where you’re at in

the comments section below let me know what the crosswind component was and if

this videos been helpful for you and if you have any questions if you haven’t

joined the seven-four crew consider subscribing I look forward to hearing

from you until then keep the blue shadow