From: chosp@cox.net   
      
   "Rafael Almeida"  wrote in message   
   news:d9kc7q$f2e$1@domitilla.aioe.org...   
      
   > What are the main problems on making a space rocket.   
      
   Money, time, politics, and the determination   
   to carry it through.   
      
   >Why they cost so much more than planes?   
      
   Large rockets are quite simple in concept   
   but excruciatingly difficult in reality.   
      
   Is not having a serie production of space rockets   
   > (or spacebusses) the reason?   
      
   Not really. The complexity doesn't decrease.   
   The economies of scale won't entirely overcome that.   
      
   > Setting a satellite, for example, i wouldn't think there's much to it.   
      
   You should, however.   
      
   > You just have to make some rocket that doesn't even have to come back to   
   > earth again, and it should just carry a satellite.   
      
   Simple in concept.  It's a bit trickier than it sounds.   
   Try to design, construct, and successfully launch   
   a large, liquid fueled, multi-stage rocket sometime.   
   There's more to it than you might think.   
      
   >Aside the price to make the satellite, wouldn't the rocket be accessible? I   
   >mean, calculating the route, the angle, when to launch it and all shouldn't   
   >be the most dificult part, right?   
      
   No.   
      
   >i don't see why it would be that much complicated, i don't see why it would   
   >be that much harder than making a plane.   
      
   Perhaps you may have a limited engineering experience?   
   Perhaps you are unaquainted with the stress differentials   
   between accelerating to 600 mph vs. 17,500 mph in just   
   a few minutes? Or perhaps you have not sufficiently   
   aware of the requisite fluid dynamics issues?   
     Or vibration issues? Or balance issues? etc.   
      
   > So I guess the most expensive thing would be the fuel they use   
      
   Not remotely. Payroll costs, insurance plans,   
   retirement and other employee benefits, etc.   
   dwarf fuel costs.   
      
   > and the material they use for resisting to heat generated by the constant   
   > explosion.   
      
   That is but a small part of the overall cost.   
   Have you ever seen any of the fuel pumps used   
   on large rockets - or imagined the vibrational and   
   other stresses induced during their operation?   
      
   > Once you find out what to use, though, what's the hard thing about the   
   > material and the fuel? What do they use?   
   > One other thing, is the knowladge to make a spacebus or a space rocket   
   > accessible? If not, why not to make it public?   
      
   It has been accessible to the public all along.   
   Not all of it, of course. Some of is proprietary and some   
   of the details are restricted by the government for security reasons.   
   But the vast majority of the information is readily avalible.   
   The information is (and has been) yours for the taking.   
   Google is your friend. Self-inititive is your strongest ally.   
   Be fearless, look it up.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)