Skip to comments.
Vapor/ sound barrier phenomenon
8/14/2011
| self
Posted on 08/14/2011 2:36:59 PM PDT by 1raider1
Thought this was neat.
TOPICS: Miscellaneous; Science; Sports; Weird Stuff
KEYWORDS: lame; soundbarrier
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-64 next last
To: 1raider1
41
posted on
08/14/2011 3:27:00 PM PDT
by
TribalPrincess2U
(democRATS—just doing al Qaeda ground work? Obama owns it all now.)
To: Talisker
To really see if the sound barrier has been broken, full motion video must be observed. A still pic won’t let you know if Mach 1 has been reached or exceeded.
As an aircraft passes through trans-sonic flight the center of pressure moves aft and a discernable nose down movement can be observed. This is known as Mach Tuck.
This tuck is often attributed to the early losses of Lear 23 business aircraft and lead to the FAA requiring a two pilot cockpit rule on sweapt wing aircraft and the ‘barber pole’ on the airspeed indicator.
42
posted on
08/14/2011 3:30:06 PM PDT
by
MCCC
(The White House has turned the audacity of hope into the audacity of indifference)
To: cripplecreek
I believe that the tip of the bullwhip does indeed break the sound barrier.
43
posted on
08/14/2011 3:31:19 PM PDT
by
1raider1
To: Howie66
These arent. Sorry, no cars tho.
44
posted on
08/14/2011 3:41:22 PM PDT
by
Delta 21
(Make your choice ! There are NO civilians.)
To: 1raider1
{..points and laughs..}
HA HA
45
posted on
08/14/2011 3:47:20 PM PDT
by
Delta 21
(Make your choice ! There are NO civilians.)
To: cripplecreek
“Ive seen the same from bull whips on super humid days.”
The crack you hear when snapping a bull whip is the tip
breaking the sound barrier.
46
posted on
08/14/2011 3:51:47 PM PDT
by
OregonRancher
(Some days, it's not even worth chewing through the restraints)
To: 1raider1
47
posted on
08/14/2011 4:06:44 PM PDT
by
Daffynition
("Don't just live your life, but witness it also.")
To: Vendome
I was wrong, that's a photoshop. It's not rocket exhaust, it's short/soft field landing stuff in the air.
/johnny
To: Vendome
49
posted on
08/14/2011 4:35:06 PM PDT
by
Las Vegas Ron
(Rush Limbaugh = the Beethoven of talk radio)
To: 1raider1
In trans-sonic conditions (Mach .9 - 1.2) shock wave created.
Click it.
51
posted on
08/14/2011 4:51:06 PM PDT
by
RedMDer
(Abolish FReepathons. Be a monthly donor.)
To: 1raider1
Every now and then a poster will put up a picture that purports to be of a jet fighter breaking the sound barrier.
And most of those pictures put up have, indeed, been of a jet fighter breaking the sound barrier and not what you're referring to.
52
posted on
08/14/2011 4:52:48 PM PDT
by
aruanan
To: aruanan
If, as some have replied that the Prandtl-Glauart singularity can occur at well below trans-sonic speed, how can you say by looking at a photograph that the sound barrier is being broken?
53
posted on
08/14/2011 5:08:19 PM PDT
by
1raider1
To: Talisker
I can recall times when a Tomcat leaving NAS Alameda would literally disappear from view over the bay in its own cloud on a foggy morning.
To: 1raider1
You already knew that......
To: 1raider1
If, as some have replied that the Prandtl-Glauart singularity can occur at well below trans-sonic speed, how can you say by looking at a photograph that the sound barrier is being broken?
Because those photos were from sites where the details of the photo were published and they were taken as the plane was approaching the speed of sound. Also because of the placement of the phenomenon. There are types of condensation that are observed behind wings or trailing behind wing tips, especially in very humid air. These are not examples of that phenomenon. You can see it in some turbofan engines at take-off. The plane is moving well below the speed of sound, but the blades in the fan are operating at trans-sonic speed.
For instance, if you see anything like this, it is caused by the aircraft approaching the speed of sound:
This is not:
56
posted on
08/14/2011 5:46:44 PM PDT
by
aruanan
To: aruanan
57
posted on
08/14/2011 5:57:47 PM PDT
by
1raider1
To: aruanan; 1raider1
Re the bottom photo — those are condensation trails. Also often observed flowing from rear wings of Indy-type cars. Re the top photo, I would guess the aircraft has broken M1.0. Below 1.0, conditions are unstable.
To: 1raider1; All
59
posted on
08/14/2011 6:19:30 PM PDT
by
Bean Counter
("For every man there exists a bait he cannot resist swallowing.".....Nietzsche)
To: JRandomFreeper
And then getting better after being dead...Lots of room for improvement, there.
60
posted on
08/14/2011 9:18:14 PM PDT
by
Smokin' Joe
(How often God must weep at humans' folly. Stand fast. God knows what He is doing.)
Navigation: use the links below to view more comments.
first previous 1-20, 21-40, 41-60, 61-64 next last
Disclaimer:
Opinions posted on Free Republic are those of the individual
posters and do not necessarily represent the opinion of Free Republic or its
management. All materials posted herein are protected by copyright law and the
exemption for fair use of copyrighted works.
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson