Gearman sucked in sharply at that. Not surprisingly, Truman thought. Chase energy weapons were always among the most powerful any warship carried, but the graser she had just described had an aperture fifty-six percent greater than chasers mounted in most light cruisers twice her size. But she'd heard the same reaction from someone in almost every group she'd briefed on the new LACs, and she ignored the sound of surprise and continued in that same Saganami Island voice.
"The power of this weapon is made possible because it is the only offensive energy weapon she mounts, because her missile armament has been substantially downsized, because her impeller node mass has been cut by forty-seven percent, and because her crew is even smaller than that normally assigned to a LAC. Her entire complement will consist of only ten people, which allows a major reduction in life support tonnage. In addition, her normal reactor mass bunkerage has been omitted."
She paused, and Gearman looked at her with a very strange expression. She only waited, and finally he shook his head.
"Excuse me, Ma'am. Did you say her bunkerage had been omitted? "
"Aside from that required for her reaction thrusters, yes," Truman confirmed.
"But—" Gearman paused, then shrugged and took the plunge. "In that case, Ma'am, just what does she use to fuel her fusion plant?"
"She doesn't have one," Truman told him simply. "She uses a fission pile."
Three sets of eyebrows flew up as one, and Truman smiled thinly. Humanity had abandoned fission power as soon as reliable fusion plants became available. Not only had fusion posed less of a radiation danger, but hydrogen was one hell of a lot easier and safer (and cheaper) than fissionables to process. And, Truman knew, Old Earth's Neo-Luddite lunatics, who'd been doing their level best to abolish the very concept of technology as somehow inherently evil about the time fusion power first came along, had managed to brand fission power with the number of the beast as the emblem of all that was destructive and vile. Indeed, the rush to fusion had been something much more akin to a stampede, and unlike most of the claptrap the Neo-Luddites had spouted, fission power's evil reputation had stuck. Contemporary journalists had taken the negatives for granted at the time, since "everyone knew" they were true, and no popular historian had been particularly interested in reconsidering the evidence since, especially not when the technology was obsolete, anyway. So for most of the human race, the very concept of fission power was something out of a dark, primitive, vaguely dangerous, and only dimly remembered past.
"Yes, I said 'fission,'" Truman told them after giving them most of a minute to absorb it, "and it's another thing we've adapted from the Graysons. Unlike the rest of the galaxy, they still use fission plants, although they've reduced their reliance on them steadily for the last thirty or forty years. But Grayson—and, for that matter, Yeltsin's asteroid belts, as well—are lousy in heavy metals... and fissionables. They'd bootstrapped their way back to fission power by the time of their Civil War, and by the time the rest of us stumbled across them again and reintroduced them to fusion, they'd taken their fission technology to levels of efficiency no one else had ever attained. So when we added modern, lightweight antiradiation composites and rad fields to what they already had, we were able to produce a plant which was even smaller—and considerably more powerful—than anything they'd come up with on their own.
"I don't expect anyone to be installing them on any planetary surfaces any time soon. For that matter, I doubt we'll see too many of them being installed in capital ships. But one of the new plants handily provides all the power a Shrike needs, and despite all the bad-history bogeyman stories about fission, disposal of spent fuel elements and other waste won't be any particular problem. All our processing work is being done in deep space, and all we have to do with our waste is drop it into a handy star. And unlike a fusion plant, a fission pile doesn't require a supply of reactor mass. Our present estimate is that a Shrike's original power core should be good for about eighteen T-years, which means the only practical limitation on the class's endurance will be her life support."
Gearman pursed his lips in a silent whistle at that. One of a conventional LAC's several drawbacks was that its small size prevented it from cramming in anything like the bunkerage of regular warships. RMN battlecruisers could take on sufficient reactor mass for almost four months, but they were specifically designed for long-range, deep penetration raids as well as convoy protection. A light attack craft, on the other hand, was fortunate to be able to stow sufficient hydrogen for a three-week deployment, which made her dreadfully short-legged compared to her betters. But if she only had to refuel every eighteen years—!
"It sounds impressive, Ma'am," he said after a moment, "but I don't know a thing about fission power."
"Neither does anyone else off Grayson, Mr. Gearman—outside the teams which have been developing the new piles for us, that is. We only have fully trained crews for ten or twelve of our LACs; the others will be trained here aboard Minotaur and the Hancock Station fleet base, and we've been fully equipped with the necessary simulators. We also have a suitable training cadre from the Jankowski Cartel to help you engineering types ease into things. You'll have about three T-weeks between here and Hancock to get your toes wet, and current plans call for you and your fellow engineers to be properly familiarized with your new equipment within three months, at which time we will begin our actual hands-on training with the LACs." She shrugged. "Ass-backwards, I know. You should have been trained on the new plants before Minotaur's keel was even laid. But even though Project Anzio has been given the highest priority, certain, ah, hardware aspects of it have refused to cooperate as much as we might have wished. And to be honest, some of the security types were always happier with the idea that all the training would take place aboard Minotaur, well away from any prying eyes, and not in simulators aboard a shipyard somewhere."
She considered—briefly—mentioning the entrenched opposition of certain senior officers who saw the entire LAC concept as a useless diversion of resources and manpower from more practical (and traditional) weapons mixes. But the temptation was brief. None of this trio had the seniority to become involved in that kind of high-level internecine strife, and there was no point in worrying them over it.
"But if we're not checked out on the power plants, how—?" Gearman began, then cut himself off with a blush. A prudent lieutenant did not press a captain of the list for information she chose not to offer, but Truman only smiled once more.
"How will we get them aboard without power?" she asked, and he nodded. "We won't," she said simply. "We'll be taking eighteen of them aboard before we leave for Hancock; the remaining units of the wing have already departed for that system, tucked away in the cargo holds of half a dozen freighters. Does that answer your question?"
"Uh, yes, Ma'am."
"Good. Now, if you'll look back at the holo," Truman went on, "you'll notice these projections here." The pointer's light beam swept over a series of eight open-mouthed, elongated blisters, just aft of the forward impeller ring and placed so that they aligned with the spaces between the ring's nodes. "These are missile tubes," she told them. "These four—" the pointer tapped "—are anti-ship launchers, each equipped with a five-round 'revolver' magazine. The Shrike only has twenty shipkillers, but she can launch one from each tube every three seconds." It was Stackowitz's turn to purse her lips silently, and Truman's pointer indicated the other four tubes. "These are for counter-missiles, and the reduction in normal missile armament lets us fit in seventy-two of those. In addition, if you'll notice here—" the pointer touched the sleek prow again. "These are point defense laser clusters: six of them, in a ring around the graser emitter."