PPRuNe Forums - View Single Post - How far will an aircraft travel in 2-1/2 minutes with a groundspeed of 98 knots?
Old 10th Apr 2015, 09:58
  #11 (permalink)  
Join Date: Aug 2005
Location: Glens o' Angus by way of LA
Age: 56
Posts: 1,974
It should be fairly obvious from the replies above, for a no wind day - but wind will completely change the situation - hence the infamous 'whizz wheel' where you can graphically add the wind vector and then derive groundspeed.
Or you could ball park it with the wind direction degrees of beam, i use the "6" method ie. if the wind is 30 degrees of beam its 3/6 (half) the wind speed decducted from the GS, if its anything more than 60 degrees (6, 6's) deduct the full wind speed.

If I have this wrong I will gladly be corrected.
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