And the rocket was then traveling--so
it was later computed--at seven-eighths of the speed of light. Between
the flat cone on the front of the distress-torpedo, and the flat cone on
the ground, a field of force existed. The field was not on the back
surface of the torpedo's cone, but before the front surface. It went
back to the moon from there, so all the torpedo and its batteries were
in the columnar stressed space. And an amount of rocket-push that should
have sent the four-foot torpedo maybe twenty miles during its period of
burning, had actually extended its flight to more than thirty-seven
hundred miles before the red sparks were too far separated to be traced
any farther, and by then had kicked the torpedo up impossibly close to
light-speed.
In a sense, the Dabney field had an effect similar to the invention of
railways. The same horsepower moved vastly more weight faster, over
steel rails, than it could haul over a rutted dirt road. The same
rocket-thrust moved more weight faster in the Dabney field than in
normal space. There would be a practical limit to the speed at which a
wagon could be drawn over a rough road.
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