Crosswind Calcualtions
Hoping that some-one may be able to help out here.
I am trying to recall a method that was demonstrated to me in my dim and distant past for calculating the X wind on the ground. I know of 2 'mental' methods that I was taught; the first being associated with utilising the clock code, ie:
W/V 120/30
R/W 18
X wind: 15Kts based on the fact that 60 degrees equates to the 6 on the clock face and as that is then 1/2 [of the hour] the wind componant. This also works for 30 degrees being 1/4 of the wind componant.
The second method related to calculating the cross wind when airborne and refers to percentages, ie, 90% of the head wind componant etc.
I would be most greatful if some-one can point out the correct method of these 2 systems as I am getting myself a little confused and want to give a clear explanation to a colleague.
I do know how to use the wizz wheels for such calculations but really wanted to impart a little extra information just to help a particular situation.
Thanks in advance...
[This message has been edited by socrates (edited 28 June 2001).]