From: snidely.too@gmail.com   
      
   JF Mezei is guilty of  as of   
   10/14/2021 3:05:04 PM   
   > A while back, I asked about whether Virgin Galactic's "plane" could be   
   > upgraded to ballistically do suborbital and be useful to travel from A   
   > to B. The answers were "not even close" (and that was understatement   
   > since it reaches 100km altitude with speed of 0, and doing New York   
   > Sydney ballistically requires near-orbital speed and thus heat shields).   
   >   
   > So now I ask about flying A to B more conventionally with "wings".   
   >   
   > Lets assume one had magical engines that suck in vacuum and pushed it to   
   > the back to generate any thrust we wanted. (some pixie dust may be   
   > involved :-).   
   >   
   > Say we fitted those engines on a Concorde.   
   >   
   > Concorde ezperienced tolerable skin heating of X° cruising at Mach 2 at   
   > 60,000 feet.   
   >   
   > Could one raise altitude and maintain lift by increasing speed all the   
   > way to near Kaman line?   
   >   
   > Would lift generated by wings and heating of skin have linear   
   > relationships since both depend on airspeed and density of air? or would   
   > skin heating increase at faster rate than lift as you scale   
   > altitude/airspeed?   
   >   
   > aka: if the goal is just to maintain lift to keep weight of Concorde at   
   > same altutude, can you raise aotutude and speed while keeping skin   
   > heating to basically the same X°?  (goal is not to go as fast as   
   > possible, just keep flying but at higher speed/altitude).   
   >   
   > From aerodynamics point of view, would the shape of Concorde scale to   
   > higher speeds/higher altitude if the increased speed matches the need to   
   > maiintain the same aerodynamic lift generation?   
   >   
   > Would speed needed to generate lift from such wings scale to near   
   > orbital speed well below Kaman line or near it?   
   >   
   > I assume someone has simulated a Concorde and done what speed is needed   
   > at what altitude to maintain lift?  Curious on how high/fast the   
   > airedynamci plane could fly if you remove the engine limitations from   
   > equation.   
   >   
   > From a descent point of view, is it correct to state that as long as the   
   > plane "flies" (aka its weight carried by lift geerated by wings) it can   
   > use the friction to slow it down (engines generate 0 thrust) so it can   
   > progressively descend while always keeping a speed that doesn't exceed   
   > heating limitations for skin?   
      
      
   Hypersonic craft don't seem to look much like a Concorde.   
      
      
      
      
   /dps   
      
   --   
   I have always been glad we weren't killed that night.  I do not know   
   any particular reason, but I have always been glad.   
     _Roughing It_, Mark Twain   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)