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Jetwash

eriknorth

Well-known member
Joined
Jan 28, 2002
Posts
148
Total Time
almost
I was sitting on the viewing platform at PDK airport today, and there was a Challenger next to it pointing away, getting ready to taxi. I knew what was coming, so I hung out until it left. I don't think I'll ever get tired of that blast of jetwash when they start to taxi. How fast of a wind do you suppose that creates at that point?
 

tarp

Well-known member
Joined
Jan 24, 2002
Posts
539
Total Time
Lots
Every jet engine has it's own signature.

Our 6,000lb thrust engines has an EPA (Engine Protection Area) that cones out at 5 degrees (of shape) from the engine outlet at 60ft.
At 60ft, the wind speed is 140 kts and the temp is 120 F.

At 120 ft, there is cross over potential from the other engine and the wind speed is now 80 kts at 100F temp.

At 180 ft, blast speed is now 41 Kts and 87F temp.

Numbers are based on standard day, no ambient wind and max thrust, so you would feel something less on the ground for each range of distance.

Anybody got marshmellows?
 

Timebuilder

Entrepreneur
Joined
Nov 25, 2001
Posts
4,625
Total Time
1634
Hey, has anyone tried to send you over to the hangar for a bucket of Jetwash, or a spool of flightline?
 

troy

Well-known member
Joined
Feb 20, 2002
Posts
528
Total Time
~500
I thought I'd never get tired of the jetblast until I was blown down the flight deck by a turning EA-6B on the aircraft carrier.:p
 
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