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A boron-carbon-hydrogen compound would not be quite so powerful as a straight boron hydride, but it might be a pleasanter playmate.

Horrified, Rick saw a fireman, clumsy in his protective suit, trip and fall before the oncoming flood of flaming boron hydride.

He could almost picture the stream of boron hydride blending with the oxidizer and flowing in an ever-increasing stream toward the combustion chamber.

With an unstable fuel like boron hydride, that made the difference.

Now and then he looked through the thick glass ports, and he saw the green mist of boron hydride as fuel throbbed slowly into the rocket's tanks.