Post by LOU on Oct 13th, 2011 at 3:31am
pj747 said: The reversing thrust on the C-17 goes back through the engine...
Peter, is that a statement or a question? :-/
That is NOT what you are looking at in the picture of the C-17.
The tornado going into the inlet on the C-17 is a very common sight on all jet engines in high humidity conditions. The suction of the fan causes a low pressure area at the inlet and a resulting drop in temperature which produces the visible vortex much in the same way the vortex formed at the wing tip causes the air to become filled with condensation and thus visible.
The Boeing 737 had a kit to prevent stones and gravel from entering the inlet. This device was designed to break up this suction vortex.
Bleed air was used through a spray bar to dissipate the vortex.
As for the P.R. stunt I wonder if you would say the same thing if the airline was say Southwest? :o
Lou
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Peter, is that a statement or a question? :-/
That is NOT what you are looking at in the picture of the C-17.
The tornado going into the inlet on the C-17 is a very common sight on all jet engines in high humidity conditions. The suction of the fan causes a low pressure area at the inlet and a resulting drop in temperature which produces the visible vortex much in the same way the vortex formed at the wing tip causes the air to become filled with condensation and thus visible.
The Boeing 737 had a kit to prevent stones and gravel from entering the inlet. This device was designed to break up this suction vortex.
Bleed air was used through a spray bar to dissipate the vortex.
As for the P.R. stunt I wonder if you would say the same thing if the airline was say Southwest? :o
Lou
Uploaded with ImageShack.us