3fbb94cc   
   From: AKWolffan@gmail.com   
      
   On 2017 Mar 04, MrAnderson wrote   
   (in article<1f99ad14-4db1-45b4-93c3-02892643c3d0@googlegroups.com>):   
      
   > So, I just need to know if it is possible to launch human from cannon that   
   > works like V3 German cannon, just much longer to make acceleration smaller.   
   > Would there be need to accelerate first in gun and then the bullet with   
   > people by onboard rockets? What would be the g-forces?   
      
   let’s do the math...   
      
   v = u + at   
      
   u= 0   
      
   v = 8 km/s, orbital velocity, to 11.2 km/s, escape velocity.   
      
   if you keep accel down to ten gees, then t = v/a = 8 x 10^3/100 (make 1 gee   
   10 m/s/s to keep things simple) or 80 s to make orbit, or 11.2 x 10^3/100 or   
   112 s to escape. (ignoring pesky details like air resistance, of course)   
      
   s = ut + 0.5 at^2   
      
   u still 0, so your linacc would have to be .5 x 100 x 80^2 or 3.2 x10^5 m..   
   320 km long. 627.2 km for escape velocity.   
      
   good luck with that.   
      
   oh, you could get it to work on the Moon, but it just ain’t happening on   
   Earth.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)