As if to prove it, Port Evergreen was even less impressive than Shackleton. It was dusk when they arrived, with barely enough maroon light left in the sky to illuminate the desolate rock. Port Evergreen nestled at the lee of a kilometer-wide dip in the blank cliff face that the island presented to the sea. It had one hangar, six silvery pressurized huts, and a long two-story building that looked like some kind of cheap hotel. The wormhole generator was housed in an armadillo-shaped edifice of raw carbon panels, with one fat tapering end sheltering the gateway arch. There was no rail track leading into it, which surprised Mellanie.
Their Carbon Goose splashed down in a reasonably smooth fashion, parallel to the shore, although once they hit the water deceleration was a lot sharper than any normal aircraft runway landing. For once Mellanie was grateful for the plyplastic grips holding her into the seat. She suited up carefully as they taxied in to the land. There were four more of the huge flying boats standing outside the hangar; by strict rotation another had flown back to Shackleton as they came the other way.
Two suited figures were standing at the bottom of the air stairs when the passengers disembarked. The first introduced himself as Eemeli Aro, the CST technical officer responsible for the wormhole generator.
“Good timing on your part,” he told the passengers. “The wormhole cycle starts in another eighteen minutes. There’s no need to rest up in the lodge.” A hand waved in the direction of the gateway. “You all just walk over there, and as soon as it opens I’ll give you the all clear. Just walk through.”
Mellanie had been expecting a slightly more elaborate arrangement, but she and Dudley exchanged a quick glance through their helmets, and started traipsing over the rock. The red sun was already close to the horizon, and falling fast. Its neutron companion continued to send out dazzling flashes, as if it was the emergency strobe on some sinking ship.
Polyphoto lights were shining on all of Port Evergreen’s buildings, producing weak yellow splashes on the rock as the sunlight vanished. The stars came out quickly, leaving Mellanie feeling very small and exposed. For the first time in her life she truly understood the concept of darkness closing in.
The five passengers huddled close together in front of the gateway. A wan ultramarine light filled the arch, only visible now the red sun had set. It wasn’t cold, but Mellanie folded her arms, hugging herself and shifting her weight from one foot to another. She mentally urged the wormhole to power up, but there was nothing she could do to hurry the stormrider.
Half Way’s strange binary star was the final factor in selecting the icy planet as a site for the wormhole stations. Even though its diameter was considerably smaller than a standard commercial CST wormhole, the Far Away wormhole still had a massive energy consumption requirement. The basis of the stormrider was an idea that went back to almost the beginning of the twentieth century’s “space age”: a contra-rotating windmill, powering a simple electrical generator, that worked off the solar wind.
Like the original concept, the stormrider had rectangular blades, sixteen of them radiating out from the hub, each one a flat lattice of struts twenty-five kilometers long, made from the toughest steelsilicon fibers the Commonwealth knew how to manufacture. Twenty-three kilometers of them were covered by an ultra-thin silvered foil, giving a total surface area of over one thousand eight hundred square kilometers for the solar wind to impact on. Even in an ordinary solar system environment that would have produced a considerable torque. In the Half Way system the stormrider was positioned at the Lagrange point between the red star and its neutron companion, right in the middle of the plasma current, where the ion density was orders of magnitude thicker than any normal solar wind. The power the stormrider produced when it was in the thick of the flow was enough to operate the wormhole generator. But it couldn’t simply sit at the Lagrange point producing electricity continuously; that would have been too much like perpetual motion. As the waves of plasma pushed against it, they exerted an unremitting pressure on the blades that blew the stormrider away from the Lagrange point out toward the neutron star. So for five hours the two sets of blades would turn in opposite directions, generating electricity for the Port Evergreen wormhole that was delivered via a zero-width wormhole. The stormrider also stored some of the power, so that at the end of the five hours when it was out of alignment, it had enough of a reserve to fire its onboard thrusters, moving itself even farther out of the main plasma stream where the pressure was reduced. From there it chased a simple fifteen-hour loop back around through open space to the Lagrange point, where the cycle would begin again.
