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Old 5th November 2011 | 16:39
  #53 (permalink)  
eckhard
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Joined: May 2005
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From: France
Hi wily flier

I wonder how a Jumbo fares doing a 180 downwind turn in a 200 mph wind .
Never done a 180 turn but maybe about 45 degrees with a 150kt wind from the front quarter which after the turn becomes a tailwind from the rear quarter.

What happens? Well, as you'd expect, the groundspeed changes fairly quickly during the turn as the headwind component changes to a tailwind component but the airspeed stays absolutely steady at around 300 kts indicated.

In a holding pattern, the highest wind speed I've seen is about 65 kts. Here of course, I've done 180 turns and the same applies. There is no change in the IAS (about 220 kts). In the case where the wind is aligned with the hold axis, the groundspeed varies between about 185 and 305. (TAS about 240 kts).

So to answer your question; 'Very well, thank you!'

Eckhard
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