What is a :"black line of presssure wave"?
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Join Date: Aug 2001
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What is a :"black line of presssure wave"?
Just fininshed reading an article about a old Qantas 707 being ferried back to Australia. At some stage during the cruise the writer sitting in the cabin could see " the black line of the pressure wave oscillating around number three engine".
Would anyone be kind enough to bring a bit of light on the matter.
Thank you.
Would anyone be kind enough to bring a bit of light on the matter.
Thank you.
Join Date: Mar 2007
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shock wave?
Only a guess but I think he refering to the Mach shock wave which can seen during certain atmospheric conditions. The reference to the number 3 engine is a little confusing other than this condition can usually be seen on the inboard portion of the wing.
Join Date: Feb 2005
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Here's a previous thread. There may be others too.
