|Quoting Blackbird (Reply 2):|
Would it be correct to say that afterburners have little effect on Ozone Layer?
|Quoting Blackbird (Reply 5):|
But did the pre-vaporization reduce or eliminate large amounts of water-vapor?
|Quoting Blackbird (Reply 7):|
How much destruction to the ozone layer would a fleet of 500 SST type airplanes cause just as a result to water-vapor? (providing NOx levels were curbed to reasonable amounts)
|Quoting Prebennorholm (Reply 8):|
The history books will to some extent put Titanic, Graf Hindenburg, and the Concorde into the same basket. Of course the Concorde was by far the most successful of that trio. But there are several similarities, the most important being that none of them will ever happen again. Because today we have much more efficient ways to do the same thing.
|Quoting Blackbird (Reply 10):|
Probably true, but for the sake of hypotheticals, let's say 500-SST Type planes with a mach 3 cruise speed, with a typical cruise of 71,500 ft to 76,500 ft (With extremes of 70,500 to 78,000 feet). How much damage would that do to the Ozone layer due to water-vapor productions?
|Quoting Blackbird (Reply 12):|
So, if NOx were ultra-low, the water vapor wouldn't do as much harm?
|Hungarian AF MiG-29UB - smoke|
|Hungarian AF MiG-29UB - no smoke|
|Quoting Blackbird (Reply 18):|
Yeah, I remember that when an RA-5C Vigi pilot was talking about doing recon runs and they'd always use some degree of AB, in addition to the speed increase so that the J-79's wouldn't produce the characteristic black smoke.
|Quoting Prebennorholm (Reply 17):|
Black smoke is soot particles. Half burned carbon rich fuel particles. It is not gas which blends with the atmosphere, but tiny, solid particles. The less efficient the combustion, the more soot is generated.
|Quoting Prebennorholm (Reply 19):|
I remember one sunny afternoon around 1970. I was on the sun deck of a car ferry, and two Luftwaffe RF-4C Phantoms passed at high speed 200 feet overhead. Most people of course got a chock, but I had seen the growing black smoke ball on the horizon half a minute in advance.
|Quoting Blackbird (Reply 21):|
You sure about that. If I recall correctly, the J-79 had a higher pressure ratio than the J-57. From what I remember it's combustor wasn't as good.
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