SS2O:

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   Compute single-stage fuel mass needed to reach a velocity.

   Type SS2O for a demo.
   Since version 1.0
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   Form:
   [mF, mT, mS, e] = SS2O( Isp, mP, fS, dV )
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   ------
   Inputs
   ------
   Isp          (1,1) Specific impulse    (sec)
   mP           (1,1) Payload mass
   fS           (1,1) Structural fraction
   dV           (1,:) Required delta v    (km/sec)

   -------
   Outputs
   -------
   mF          (1,:) Fuel mass
   mT          (1,:) Total mass				    
   mS          (1,:) Structural mass				    
   e           (1,:) Fraction of the launcher that is the payload

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	References:	  Wiesel, W. E., Spaceflight Dynamics, McGraw-Hill, 1988,
                 p. 187.
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Children:

Common: Graphics/Plot2D