W/V 120/30
R/W 18
X wind: is nearly 30 kts !
Think about it ..
If the wind is 180/30 then xwind is zero
If it is 60 degrees from the left it is max
The clock rule is degrees off divided by 60
i.e.
10/60 20/60 30/60 40/60 etc
In this case its is 60/60 = 1 so full xwind!
If its 45 its 3/4
If its 30 its 1/2
If its 10 its 1/6
If its 60 its the full monty
Its easy...
Remember x wind issued by ATC at take-off is magnetic and so is you DI reading so no problems here
The aim in a commercial check ride is to give the examiner an estimate of the component and orientate ailerons
Know your xwind limits !
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Working out the component in the air
is different and requires the TAS
60/TAS is the additional factor
If its 90kts You factor the above by 2/3
If its 120 kts you factor by 1/2
So a 30 kt wind will have max drift 15 degrees if TAS = 120 kts