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N2K
04-12-2006, 07:03 PM
http://www.flightlevel350.com/video_streaming.php?id=990

John-Paul
04-12-2006, 07:09 PM
Are you referring to the condensation cloud? If so, then I'd say read up on the "Prandtl-Glauert singularity." Here's a good starting point if it's of interest to you:

http://en.wikipedia.org/wiki/Prandtl-Glauert_singularity

<}US{>BlackHawkPilot73
04-12-2006, 07:41 PM
http://www.flightlevel350.com/video_streaming.php?id=990

He broke the sound barrier:p

dont ask how its done im to stupied

Jackass
04-12-2006, 08:14 PM
It's done by high speed. :p

MisterBubbles
04-12-2006, 08:30 PM
He broke the sound barrier:p

dont ask how its done im to stupied


Ahhahaha you try to steal N2K's sig and end up with a crappy *** one.

AlphaWhiskey
04-12-2006, 08:45 PM
dude he broke the sound barrier at 2000 mph. Look it up on google it tells why the cloud appears...

<}US{>BlackHawkPilot73
04-12-2006, 08:45 PM
Ahhahaha you try to steal N2K's sig and end up with a crappy *** one.

mine doesnt look like his?

AF-|FireFox|
04-12-2006, 09:39 PM
dude he broke the sound barrier at 2000 mph. Look it up on google it tells why the cloud appears...
Uhhh...no.

He did break the sound barrier, achieving Mach 1. Mach 1 depends on many factors like temperature, density altitude, etc.. He is going Mach 1 but its not 2000mph - my guess would be around 700 knots when he is going there.

The cloud is formed from shock waves coming from the aircraft become visible and condense from the rapid compression. They form in the middle because only the aft part of the aircraft is actually supersonic - not the front.

D|sso
04-12-2006, 10:05 PM
Any person who doesn't quite know what they're talking about commonly associates the huge mass of condensation as a sign that an aircraft is breaking the sound barrier.

However, the cloud is nothing more than an example of Prandtl-Glauert singularity. It has nothing to do with supersonic flow or shockwaves. Near the speed of sound, Prandtl-Glauert singularity amplifies all pressure perturbations around the aircraft, and the low pressure above the aircraft corresponds to the that of below. The lowered pressure results in a drop of temperature causing condensation of surrounding water vapor.

This is way it is most common at low altitude level flight under humid conditions.

Also, you can hear the announcer and crowd bring up the fact that the aircraft indeed is not breaking the sound barrier.

MedicManiac
04-13-2006, 01:10 AM
Yeah I got that as my avatar.

munky99999
04-13-2006, 02:00 AM
Uhhh...no.

He did break the sound barrier, achieving Mach 1. Mach 1 depends on many factors like temperature, density altitude, etc.. He is going Mach 1 but its not 2000mph - my guess would be around 700 knots when he is going there.

The cloud is formed from shock waves coming from the aircraft become visible and condense from the rapid compression. They form in the middle because only the aft part of the aircraft is actually supersonic - not the front.
Ya its works like this. wings are curved so when the air his the wing its seperated and the air on top of the wing moves faster then the air which is below. this is what causes lift. now when your going around the speed of sound the air thats above the wing is going to be made to go fast(er) as the speed of sound and the bottom being slower. So when they come back together they have a condensation/fog effect.

as for speed of sound. its around 1000km/h 650mil/h 650 knots in room temp anyway. way up high its alot colder but it doesnt affect it that much.

The cloud is formed from shock waves coming from the aircraft become visible and condense from the rapid compression.
its not shock waves. Its the low pressure above the wing lifts the plane and the higher pressure(relative to above the wing) below the wing. And when those 2 pressures mix they cause the condensation. but as well there really isnt condesation to occur it doesnt last long.

MG36CE Fan
04-13-2006, 05:01 AM
dude he broke the sound barrier at 2000 mph. Look it up on google it tells why the cloud appears...



uhh.....


Sound Barrier is 700 MPH, not 2000 MPH

and by the way NO combat aircraft can go 2000 MPH

D|sso
04-13-2006, 05:10 AM
Wrong. The Mig-25 Foxbat and Mig-31 Foxhound can, but only briefly.

N2K
04-13-2006, 07:56 PM
I wanna go that fast!

Sir. XaliaS
04-13-2006, 08:09 PM
Lift is a gift, thrust is a must!

The speed at which those jets have to travel (and I know this because I've done it)
is a MILLION miles an hour.... a MILLION!

AudieMurphy99
04-14-2006, 02:33 AM
Lift is a gift, thrust is a must!

The speed at which those jets have to travel (and I know this because I've done it)
is a MILLION miles an hour.... a MILLION!
:laugh: