Reply to thread

Message

<blockquote data-quote="pigoo3" data-source="post: 1621747" data-attributes="member: 56379">Thanks for the story &amp; info Dave…pretty interesting!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp; The reason why I asked was for 2 reasons:1.&nbsp; Didn't think that the Concorde cruised at too much more than Mach 1.0 (just ignorance of the topic on my part)!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />&nbsp; Of course they did slow down a lot as they descended…and got close to airports (noise issues).2.&nbsp; Don't think too many military aircraft of the late 80's cruised at Mach 2.0+ very often.When I was in the military in the 80's…a big part of my job was aircraft recognition (good guys &amp; bad guys)!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />&nbsp; And knowing various specs about them.As I'm guessing you also know…the speed of sound varies greatly with altitude.&nbsp; I looked up the speed of sound at various altitudes.&nbsp; At sea level the speed of sound is 761mph…at 60,000 feet…it's roughly 660 (100mph difference).&nbsp; So Mach 2.0 being 1522mph at sea level vs. 1320mph at 60,000 feet.And the military aircraft I'm thinking of…were probably flying lower then 20,000 feet…and many times a lot lower than that (a LOT lower).<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />- Nick</blockquote>

[QUOTE="pigoo3, post: 1621747, member: 56379"] Thanks for the story & info Dave…pretty interesting!:) The reason why I asked was for 2 reasons: 1. Didn't think that the Concorde cruised at too much more than Mach 1.0 (just ignorance of the topic on my part)!;) Of course they did slow down a lot as they descended…and got close to airports (noise issues). 2. Don't think too many military aircraft of the late 80's cruised at Mach 2.0+ very often. When I was in the military in the 80's…a big part of my job was aircraft recognition (good guys & bad guys)!;) And knowing various specs about them. As I'm guessing you also know…the speed of sound varies greatly with altitude. I looked up the speed of sound at various altitudes. At sea level the speed of sound is 761mph…at 60,000 feet…it's roughly 660 (100mph difference). So Mach 2.0 being 1522mph at sea level vs. 1320mph at 60,000 feet. And the military aircraft I'm thinking of…were probably flying lower then 20,000 feet…and many times a lot lower than that (a LOT lower).;) - Nick [/QUOTE]

Verification

Name this item 🌈