Couple of cool pictures....
16 May 2009, 08:13 PM
#1
Scooby Regular
Thread Starter
Join Date: Aug 2003
Location: Epsom
Posts: 5,832
Likes: 0
Received 0 Likes
on
0 Posts
Couple of cool pictures....
for the aeronautical amongst you...
Space Shuttle Atlantis caught in silhouette against the Sun - Times Online
Stealth bomber photographed breaking sound barrier - Telegraph
Space Shuttle Atlantis caught in silhouette against the Sun - Times Online
Stealth bomber photographed breaking sound barrier - Telegraph
Trending Topics
16 May 2009, 10:50 PM
#9
Scooby Regular
Join Date: Jun 2003
Posts: 48,539
Likes: 0
Received 0 Likes
on
0 Posts
Great shots from up there. 
I was fortunate enough to see the glorious Stealth Bombers in action (not bombing
but flying low and slow) in Fairford Air Tattoo show about 3 years ago. They didn't even land, stayed in the air, and flew back to US. Absolutely amazing 
I was fortunate enough to see the glorious Stealth Bombers in action (not bombing
but flying low and slow) in Fairford Air Tattoo show about 3 years ago. They didn't even land, stayed in the air, and flew back to US. Absolutely amazing
16 May 2009, 10:51 PM
#10
There are some great pics of planes going through the sound barrier.....my faves are an F18 Hornet and an EE lightning 
There are a few you tube clips if US navy planes doing the same, one is shore based and the other past a carrier
Shaun
There are a few you tube clips if US navy planes doing the same, one is shore based and the other past a carrier
Shaun
17 May 2009, 11:32 AM
#19
Guest
Posts: n/a
It's a hige sun spot! It's gonna explode and wipe us all out
Here's a proper sonic boom.
YouTube - Sonic Boom sound 02- Concorde breaking the sound barrier
Here's a proper sonic boom.
YouTube - Sonic Boom sound 02- Concorde breaking the sound barrier
17 May 2009, 12:16 PM
#20
Scooby Regular
Join Date: Aug 2002
Posts: 39,877
Likes: 0
Received 0 Likes
on
0 Posts
Some great pictures.
I think it must have been supersonic because the definition of an aircraft being supersonic officially is when the air is passing all parts of the aircraft at a speed greater than sound.
If it was close to sonic speed there would be shockwaves forming on parts of the aircraft where the air speeds up such as over the wings. A shockwave causes the air immediately behind it to increase in pressure and heat up so the cloud effect in that picture would not be there. The cloud is indeed water condensing due to lower pressure generated as the air speeds up over the wings but any shockwaves would be at the rear of the aircraft. This can also be seen when an aircraft is generating high lift in a tight turn in very moist air. Sometimes you can even see the water condensing out in the vortices off the rear of the wing.
An interesting phenomenon with shock waves can appear both on rocket engine exhausts and the trailing edges of hypersonic rocket control fins. Due to separation or thickening of the air layer next to the surface of the controls known as the boundary layer, a type of shockwave shaped like the letter Lambda can form. The base of this is called the Lambda Foot and the effect of pressure and temperature increase in the foot area can cause overheating of the trailing edge of the control fin. This could be useful for the next pub quiz you attend!
Les
I think it must have been supersonic because the definition of an aircraft being supersonic officially is when the air is passing all parts of the aircraft at a speed greater than sound.
If it was close to sonic speed there would be shockwaves forming on parts of the aircraft where the air speeds up such as over the wings. A shockwave causes the air immediately behind it to increase in pressure and heat up so the cloud effect in that picture would not be there. The cloud is indeed water condensing due to lower pressure generated as the air speeds up over the wings but any shockwaves would be at the rear of the aircraft. This can also be seen when an aircraft is generating high lift in a tight turn in very moist air. Sometimes you can even see the water condensing out in the vortices off the rear of the wing.
An interesting phenomenon with shock waves can appear both on rocket engine exhausts and the trailing edges of hypersonic rocket control fins. Due to separation or thickening of the air layer next to the surface of the controls known as the boundary layer, a type of shockwave shaped like the letter Lambda can form. The base of this is called the Lambda Foot and the effect of pressure and temperature increase in the foot area can cause overheating of the trailing edge of the control fin. This could be useful for the next pub quiz you attend!
Les
17 May 2009, 07:10 PM
#21
AFAIK the B2 Spirit is high subsonic. The engines are non-afterburning as they are buried in the fuselage and again AFAIK the only plane to break the sound barrier on Supercruise is the F22 raptor.
Not sure if it would do it anyway as it does not look very "area-ruled" LOL
Shaun
Not sure if it would do it anyway as it does not look very "area-ruled" LOL
Shaun
17 May 2009, 08:42 PM
#23
Scooby Regular
Join Date: Jul 2005
Posts: 12,329
Likes: 0
Received 0 Likes
on
0 Posts
It's a hige sun spot! It's gonna explode and wipe us all out
Here's a proper sonic boom.
YouTube - Sonic Boom sound 02- Concorde breaking the sound barrier
Here's a proper sonic boom.
YouTube - Sonic Boom sound 02- Concorde breaking the sound barrier
YouTube - concorde sonic boom
Mart
17 May 2009, 08:53 PM
#24
Scooby Regular
iTrader: (6)
Join Date: Jun 2001
Location: Northampton, Xbox GamerTag - Neanderthal1976
Posts: 6,850
Likes: 0
Received 0 Likes
on
0 Posts
How do they take pictures with the sun in shot and not get burn out like I do taking a landscape pic here on earth!?! 
Lovely photos and an enlightening discussion about supersonic flight, this thread needs a Sunday night
Lovely photos and an enlightening discussion about supersonic flight, this thread needs a Sunday night
17 May 2009, 09:51 PM
#25
Guest
Posts: n/a
They take the pics on a different frequency of colour/picture then change the colours.
All the pics from Hubble of galaxies and amazing things are totally coloured in by hand, they don't come out anything like we see them, in a lot of ways they're completely false.
All the pics from Hubble of galaxies and amazing things are totally coloured in by hand, they don't come out anything like we see them, in a lot of ways they're completely false.
18 May 2009, 11:58 AM
#28
Scooby Regular
Join Date: Aug 2002
Posts: 39,877
Likes: 0
Received 0 Likes
on
0 Posts
AFAIK the B2 Spirit is high subsonic. The engines are non-afterburning as they are buried in the fuselage and again AFAIK the only plane to break the sound barrier on Supercruise is the F22 raptor.
Not sure if it would do it anyway as it does not look very "area-ruled" LOL
Shaun
Not sure if it would do it anyway as it does not look very "area-ruled" LOL
Shaun
Not quite sure how they can apply area ruling to a flying wing type of aircraft though.
Les
Last edited by Leslie; 18 May 2009 at 12:00 PM.
18 May 2009, 12:03 PM
#30
Guest
Posts: n/a
Don't think it was anyone lying Les, the stats about the B2 performance are still classified and they do not make any claims or denials about it.