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    Fugitives From Earth by  Nelson S. Bond: 
      Science Fiction Inventions, Technology and Ideas
    Intriguing story if read in context, about a year before the United States was drawn into WWII. Also, here is an interesting quote about spaceships, a prediction of a kind, which we have still not managed:
 
"Traveling from one planet to another," explained Dr. Wrenn, "is not 
merely a matter of leaping across the 
void. In calculating our flight to Venus, 
we directed our ship not toward the 
planet itself, but toward that point in 
space where Venus would be in tweny* 
one weeks' time. 
"We did this with due allowance for 
initial velocity, momentum in frictionless space, and gravitational attraction 
of both planets involved, as well as that 
of the Sun. 
 
"Unfortunately, circumstances forced 
us to defy our calculations. Thus we 
are proceeding toward Venus too fast. 
It is my fear that we may reach our 
rendezvous in space before Venus comes 
near enough that point to grasp us in 
her gravitational clutch." 
 
Hank said, frowning, "Then we must 
slow down somehow!" 
 
"Easier said than done, Hank. Oh, 
there may come a day, in the future, 
when men will build spaceships that 
will curve, wheel, disport themselves 
in the void as modern planes do in the 
air. But we are the pioneers of space 
flight — and we do not know how to do 
these things. 
 
"We can curve our path — slightly. 
But for the most part, we are like a 
bullet a huntsman has fired from his 
gun. We have established a trajectory 
and a speed. The rest is in the guidance of universal mechanics." 
  
 Select
      an invention:  
    
         Permalloy  Protects ships from the hazards of space.
           
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