DoubleFeed wrote:
Quest_techie wrote:
DoubleFeed wrote:
Quest_techie wrote:
what determines when air stops wicking heat off of something and starts producing friction with it and heating it <in other words how fast is air moving when this happens, is drag coefficient involved? all that thermodynamics jazz>
Approximately Mach 3.
thank you, I really have wanted to know that for a very long time
Not sure if that's the answer you really had in mind, or whether you were really asking WHY aerodynamic friction stops wicking and starts producing heat.
Related: The speed at which you start seeing thermal heating is the dividing line between supersonic and hypersonic.
that was pretty much the question, I wanted to know why the sr-71 had to deal with air friction so much and other stuff.... didn't
now I know, and I'm glad I do, your answer was clear, concise, complete enough to satisfy, and I now know something that I really had wanted to know
20 Feb 2007, 9:44 pm
