ef METHOD_NAME( self, weapname ):
  "Returns mass, delay, energy."
  if weapname == "laser":
     return 2., 0.9, 4.25
  elif weapname == "plasma":
     return 4., 0.675, 3.75
  elif weapname == "ion":
     return 6., 1.440, 15.
  elif weapname == "laser turret":
     return 16., 0.540, 6.12
  elif weapname == "ion turret":
     return 42., 0.765, 25.
  elif weapname == "railgun turret":
     return 60., 1.102, 66.
  else:
     raise ValueError