He had reason to be curious about microcryotrons. There was something definitely screwy going on in Antarctica.
Nearly two years before, the UN Government, in the person of Minister Wallingford himself, had asked Mike’s firm—which meant Mike the Angel himself—to design the power drive and the thrust converters for a spaceship. On the face of it, there was nothing at all unusual in that. Such jobs were routine for M. R. Gabriel.
But when the specifications arrived, Mike the Angel had begun to wonder what the devil was going on. The spaceship William Branchell was to be built on the surface of Earth—and yet it was to be a much larger ship than any that had ever before been built on the ground. Usually, an interstellar vessel that large was built in orbit around the Earth, where the designers didn’t have to worry about gravitational pull. Such a ship never landed, any more than an ocean liner was ever beached—not on purpose, anyway. The passengers and cargo were taken up by smaller vessels and brought down the same way when the liner arrived at her destination.
Aside from the tremendous energy required to lift such a vessel free of a planet’s surface, there was also the magnetic field of the planet to consider. The drive tubes tended to wander and become erratic if they were forced to cut through the magnetic field of a planet.
Therefore, Question One: Why wasn’t the Branchell being built in space?
Part of the answer, Mike knew, lay in the specifications for the construction of Cargo Hold One. For one thing, it was huge. For another, it was heavily insulated. For a third, it was built like a tank for holding liquids. All very well and good; possibly someone wanted to carry a cargo of cold lemonade or iced tea. That would be pretty stupid, maybe, but it wouldn’t be mysterious.
The mystery lay in the fact that Cargo Hold One had already been built. The Branchell was to be built around it! And that didn’t exactly jibe with Mike the Angel’s ideas of the proper way to build a spaceship. It was not quite the same as building a seagoing vessel around an oil tank in the middle of Texas, but it was close enough to bother Mike the Angel.
Therefore, Question Two: Why was the Branchell being built around Cargo Hold One?
Which led to Question Three: What was in Cargo Hold One?
For the answer to that question, he had one very good hint. The density of the contents of Cargo Hold One was listed in the specs as being one-point-seven-two-six grams per cubic centimeter. And that, Mike happened to know, was the density of a cryotronic brain, which is 90 per cent liquid helium and 10 per cent tantalum and niobium, by volume.