Aviation math

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jetblast
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Aviation math

Post by jetblast »

Can anybody tell me the formula to determine the ground speed considering I have the winds and the TAS.

Thank you in advance
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cedarjet
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Post by cedarjet »

triangle of velocities
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co-joe
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Post by co-joe »

You mean without a whiz wheel? Holy crap. What do you think we are? Super humans? :lol:
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hz2p
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Post by hz2p »

There is this mysterious thing called "trigonometry" which only a miniscule percentage of pilots are capable of calculating.

Keeping It Very Simple: for any given wind, you can break down the wind into headwind/tailwind component, and crosswind component. For groundspeed calculation, you can probably just ignore the crosswind component, and just subtract the headwind or add the tailwind to your TAS, and you'll be close enough for gov't work.

How do you figure out what headwind/tailwind component is? Using this mysterious "trig" thing, it is the cosine of the angle of the wind off the nose, multiplied by the scalar strength of the wind. When doing trig calcs be sure of your units - you are almost certainly using degrees, not radians.
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jetblast
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Post by jetblast »

You mean without a whiz wheel? Holy crap. What do you think we are? Super humans?
How do you figure out what headwind/tailwind component is? Using this mysterious "trig" thing, it is the cosine of the angle of the wind off the nose, multiplied by the scalar strength of the wind. When doing trig calcs be sure of your units - you are almost certainly using degrees, not radians.

I guess some a more human than others :lol:

Thanks for all the replies guys,

hz2p, how would the formula go, maybe like this :

(cos angle in degres) X wind speed = residual speed of wind
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Snowgoose
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Post by Snowgoose »

Give this website a shot. It contains formulas for everything. All written in MS-Excel terms.

http://williams.best.vwh.net/avform.html
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It's better to break ground and head into the wind than to break wind and head into the ground.
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jetblast
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Post by jetblast »

Thanks Snowgoose :D
Very helpful site
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Post by corn-shoot »

Just so we're clear, that is not AVIATION math, it is basic math 101 for dum dum pilots. Let's not confuse aviating for flying.
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jetblast
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Post by jetblast »

Thanks CS for reminding me that I'm a dumbass :roll:
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Post by corn-shoot »

Takes one to know one, Charlie...
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Props are STILL for boats and homosexuals that make motion pictures.
...
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Post by ... »

corn-shoot wrote:Takes one to know one, Charlie...
....shhhhhh....read the disclaimer... no names on here !!!

ok Cleetis?
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