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#1
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12-22-2010, 01:57 AM
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 So Fucking Banned Poster Rank:134 8=====> Join Date: Oct 2009 Posts: 12,437 Mentioned: 0 Post(s) Quoted: 0 Post(s)
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Sonic Boom Montage (with Vapor Cloud Formation)
Why do we hear a sonic boom?  A sonic boom produced by an aircraft moving at M=2.92 (greater than the speed of sound), calculated from the cone angle of 20 degrees. An observer hears the boom when the shock wave, on the edges of the cone, crosses his or her location. The cause for the cloud formation is because of the rapid condensation of water vapor due to a sonic shock produced at sub-sonic speed creating a vapor cone (known as a Prandtl–Glauert singularity), which can be seen with the naked eye. Contrary to popular belief that the plane is breaking the sound barrier....it actually isn't. Its just that the speed of air flowing around the plane becomes faster than sound and not the plane itself. So this can happen even when the plane moves faster and slower than sound. |
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#3
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12-22-2010, 11:32 PM
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 My Rank: GUNNERY SERGEANT Poster Rank:652 Join Date: Mar 2010 Posts: 1,346 Mentioned: 1 Post(s) Quoted: 4 Post(s)
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Re: Sonic Boom Montage (with Vapor Cloud Formation)
i was planting trees, minding my own business, and a flock (?) of low flying cf-18 hornets (i think) snuck up behind me and made that sound .. i didn't hear a thing until after i saw them and whas like "what the fu- BOOOOM crazy fast planes.. how can people even steer them?? |
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#4
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12-24-2010, 06:26 AM
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 ★ Legacy Member ★ Poster Rank:7 What we've got here is failure to communicate. Join Date: Aug 2009 Posts: 103,541
Contributions: 3
Mentioned: 112 Post(s) Quoted: 43400 Post(s)
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Re: Sonic Boom Montage (with Vapor Cloud Formation)
Nice post geez.  must be a buzz to fly one of those beauties.
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#6
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12-24-2010, 10:12 AM
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 My Rank: CORPORAL Poster Rank:1613 Male Join Date: Feb 2010 Posts: 345 Mentioned: 0 Post(s) Quoted: 2 Post(s)
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Re: Sonic Boom Montage (with Vapor Cloud Formation)
Love these video's. Nice description to go with it. Nice work mate! ''Contrary to popular belief that the plane is breaking the sound barrier....it actually isn't. Its just that the speed of air flowing around the plane becomes faster than sound and not the plane itself. So this can happen even when the plane moves faster and slower than sound.'' Also learned a new fact! |
