Part 15 (2/2)

Then they began to be turned out at the rate of two a day, and all the vast expanse of the Shed resounded with the work on them. Drills drilled and torches burned and hammers hammered. Small diesels rumbled. Disk saws cut metal like b.u.t.ter by the seemingly impractical method of spinning at 20,000 revolutions per minute. Convoys of motor busses rolled out from Bootstrap at change-s.h.i.+ft time, and there were again Security men at every doorway, moving continually about.

But it still didn't look too good. There is apparently no way to beat arithmetic, and a definitely grim problem still remained. Ten days after the beginning of the new construction program, Joe and Sally looked down from a gallery high up in the outward-curving wall of the Shed. Acres of dark flooring lay beneath them. There was a spiral ramp that wound round and round between the twin skins of the fifty-story-high dome. It led finally to the Communications Room at the very top of the Shed itself.

Where Joe and Sally looked down, the floor was 300 feet below. Welding arcs glittered. Rivet guns chattered. Trucks came in the doorways with materials, and there was already a gleaming row of eighty-foot hulls.

There were eleven of them already uncovered, and small trucks ran up to their sides to feed the fitting-out crews such items as air tanks and gyro a.s.semblies and steering rocket piping and motors, and short wave communicators and control boards. Exit doors were being fitted. The last two hulls to be uncovered were being inspected with portable x-ray outfits, in search of flaws. And there were still other ungainly white molds, which were other hulls in process of formation--the metal still pouring into the molds in powder form, or being tamped down, or being sintered to solidity.

Joe leaned on the gallery-railing and said unhappily, ”I can't help worrying, even though the Platform hasn't been shot at since we landed.”

That wasn't an expression of what he was thinking. He was thinking about matters the enemies of the Platform would have liked to know about.

Sally knew these matters too. But top secret information isn't talked about by the people who know it, unless they are actively at work on it.

At all other times one pretends even to himself that he doesn't know it.

That is the only possible way to avoid leaks.

The top secret information was simply that it was still impossible to supply the Platform. s.h.i.+ps could be made faster than had ever been dreamed of before, but so long as any s.h.i.+p that went up could be destroyed on the way down, the supply of the Platform was impractical.

But the s.h.i.+ps were being built regardless, against the time when a way to get them down again was thought of. As of the moment it hadn't been thought of yet.

But building the s.h.i.+ps anyhow was unconscious genius, because n.o.body but Americans could imagine anything so foolish. The enemies of the Platform and of the United States knew that full-scale production of s.h.i.+ps by some fantastic new method was in progress. The fact couldn't be hidden.

But n.o.body in a country where material shortages were chronic could imagine building s.h.i.+ps before a way to use them was known. So the Platform's enemies were convinced that the United States had something wholly new and very remarkable, and threatened their spies with unspeakable fates if they didn't find out what it was.

They didn't find out. The rulers of the enemy nations knew, of course, that if a new--say--s.p.a.ce-drive had been invented, they would very soon have to change their tune. So there were no more attacks on the Platform. It floated serenely overhead, sending down astronomical observations and solar-constant measurements and weather maps, while about it floated a screen of garbage and discarded tin cans.

But Joe and Sally looked down where the s.h.i.+ps were being built while the problem of how to use them was debated.

”It's a tough nut to crack,” said Joe dourly.

It haunted him. s.h.i.+ps going up had to have crews. Crews had to come down again because they had to leave supplies at the Platform, not consume them there. Getting a s.h.i.+p up to orbit was easier than getting it down again.

”The Navy's been working on light guided missiles,” said Sally.

”No good,” snapped Joe.

It wasn't. He'd been asked for advice. Could a s.p.a.ce s.h.i.+p crew control guided missiles and fight its way back to ground with them? The answer was that it could. But guided missiles used to fight one's way down would have to be carried up first. And they would weigh as much as all the cargo a s.h.i.+p could carry. A s.h.i.+p that carried fighting rockets couldn't carry cargo. Cargo at the Platform was the thing desired.

”All that's needed,” said Sally, watching Joe's face, ”is a slight touch of genius. There's been genius before now. Burning your cabin free with landing-rocket flames----”

”Haney's idea,” growled Joe dispiritedly.

”And making more s.h.i.+ps in a hurry with metal-concrete----”

”Mike did that,” said Joe ruefully.

”But you made the garbage-screen for the Platform,” insisted Sally.

”Sanford had made a wisecrack,” said Joe. ”And it just happened that it made sense that he hadn't noticed.” He grimaced. ”You say something like that, now....”

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