From: user2039@newsgrouper.org.invalid   
      
   JTEM  posted:   
      
   >   E.Laureti wrote:   
   >   
   > > Only we can get to and from Mars with a human crew   
   >   
   > I'd be satisfied with an automated return mission.   
   >   
   > Think about it:   
   >   
   > Humans can perform the work of a "Mars Rover" in a tiny fraction   
   > of the time. Humans walk *Oodles* fast than those damn things   
   > move. They cover a disappointingly small amount of ground. But...   
   >   
   > They'd be stuck on their feet. They're not going to have a cart   
   > to drive around on, a 4-wheeler or anything. If that were possible   
   > why note just send a lander that size, with that speed and those   
   > capabilities? It would be infinitely easier and cheaper.   
   >   
   > No food.   
   > No water.   
   > No humans.   
   >   
   > Think of how much LESS weight, size & cost you'd need eliminating   
   > all that, and going with a robotic version!   
   >   
   > Buzz around HUNDREDS of miles, maybe THOUSANDS instead of the 20   
   > that Curiosity managed over an entire DECADE!   
   >   
   > Yes:  20 miles per decade!   
   >   
   > A little less, actually. It took it just over 12 years to go less   
   > than 20.5 miles.   
   >   
   > So humans can walk about 4 mph, call it 2 mph with all that gear,   
   > so two humans can cover the same ground in five hour.   
   >   
   > Five hours compared to 12 years!   
   >   
   > So you're not wrong. But the proverbial "Quantum Leap" could be   
   > achieved with a larger, faster, more capable rover.   
   >   
   > We can build a vehicle that can cover 10 or 100 times the   
   > distance in a fraction of the time. And THAT is likely a far   
   > simpler and cheaper and safer than sending humans, AND it would   
   > be another step (more lessons) towards a really successful   
   > manned mission.   
   >   
   >   
      
   really i don't uderstand of what propulsion you speak.   
   It you want ... write here   
      
   https://www.tumblr.com/communities/pnnpropulsion   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)