“I feel like going to less than three mps right now, Noble.”
“We’ve got plenty of fuel, Colwin, but not all day,” Boomer said. “You can do this. You need to do this for spacecraft-commander certification, and you know you want this. Let’s do it.”
“This your idea of fun, Noble?” General Kai Raydon radioed from Armstrong Space Station.
“I think Colwin’s ready, General.”
“You’re in charge of pilot training, Noble,” Raydon said, “so you’re responsible for these little unplanned unannounced evolutions of yours. If the major dings up my station or the spaceplane, you might as well stay out there.”
“Copy loud and clear, sir. She’ll do fine.”
As Boomer watched from the upper hatch, one by one he saw the thrusters on the nose release tiny jets of hydrazine exhaust. Colwin used the spaceplane’s control stick and trim switches for directional control to make it easier and more intuitive, but steering a spacecraft wasn’t like flying an airplane because orbital forces dictated the path, not flight control surfaces or aerodynamics. Although the thrusters could make minor altitude corrections, “up” and “down” were controlled by forward velocity-slowing down always meant losing altitude, speeding up always meant increasing altitude, and you had to be ready to correct anytime you made a velocity change. There were other nuances as well. In space, there was in reality no such thing as a “turn”-you could either move laterally into an entirely different orbit, roll along the longitudinal axis, or you could yaw the nose in a different direction, with the actual orbital flight path unchanged.
Normally the flight control computer controlled all of these subtleties, but computers failed quite often, so spaceplane pilots were expected to manually fly and dock the spacecraft with control, confidence, and precision before being fully certified as spacecraft commanders. Apart from a fully manual reentry and power-off landing, manual dockings were the most difficult and nerve-racking for pilots, and they practiced doing them quite often in the simulator.
Maybe it wasn’t quite fair to unexpectedly lay this on her, Boomer thought, but it was time to see if she had what it took to qualify as a spacecraft commander. A lot of pilots stayed as mission commanders, perfectly happy to be second in command and let the computers and someone else accept all the responsibilities. Boomer was determined to separate the real spacecraft commanders from the mere pilots as soon and as safely as possible.
The cargo-bay doors were open, and he did a quick inspection of the cargo bay for any signs of damage or debris from the target release. “Cargo bay appears secure,” he reported. “Colwin, keep the bay doors open and I’ll get into the station from the air lock after you cross over.”
“Roger,” she replied, her voice cracking and monotone.
He exited the cargo bay, made his way back to the entry hatch, then looked “upward” to admire the Earth. He could watch it for hours, for days. He saw Africa beneath them, thunderstorms erupting along the Mediterranean coast near Libya; the incredible vastness of the Saharan wastelands; even the little crook in the Nile River where Luxor and the Valley of the Kings were located. Then in moments, the landmarks disappeared from view, but were replaced by even more treasures: Crete, Sicily, the impossibly blue Mediterranean, Greece, the Balkans, now Anatolia.
He always made a point on every space walk to marvel at the planet called Earth. It really was a spaceship, he reminded himself: every erg of energy, every element, every resource, every life-giving and life-sustaining particle except sunlight was already there, on that little sphere, save for a few stray atoms sent smashing in from the solar wind or from comet dust. Since the planet’s formation, the chemicals, elements, molecules, and compounds that created life had always been there, and they would never die, just be transferred into a different element, a different compound, or a different form of energy. Humans could probably kill all life as we knew it, but all the elements to rebuild life would remain on that little rock until the sun incinerated the planet in a cataclysmic supernova.
Colwin was closing nicely with the space station, now probably five hundred meters away. When Boomer saw the forward thrusters fire, he carefully eased himself out of the hatch, using the tiny nitrogen thrusters on his space-suit backpack to propel him forward enough to ease the strain on his tether. “About four minutes to go, Colwin,” he radioed. “You’re doing fine.” More thruster jets, but this time he saw jets in one direction, followed immediately by spurts in the opposite direction that seemed to push the spaceplane in the opposite direction instead of just countering the first push. “Ease up on the thrusters,” he said.
“I am.”
The docking cradle on the space station resembled a giant garden hand spade. Colwin’s job was to maneuver Midnight into position on the spade, after which a grapple underneath the craft would gently grasp the spaceplane and a transfer tunnel would be moved into position on a separate beam beside the main entry hatch. Since the Space Shuttle was retired, these days the Midnight spaceplane was the largest craft to dock on the cradle, so there was plenty of room to spare, but if the spaceplane was not perfectly in the center and not perfectly level, the grapple might not latch, the transfer tunnel might not seal tightly enough on the air lock, and the umbilicals that would service the aircraft might have to be manually attached by a spacewalker.
Boomer disconnected himself completely from the Midnight spaceplane when he knew he had plenty of thruster fuel in his space suit to reach an entry hatch on the station. He stowed the tether in its reel and made sure the hatch from the air lock to the cargo bay was secured, then eased himself away from the spaceplane. “I’m clear of the air-lock hatch,” he radioed. “Clear to close the main hatch and pressurize the air lock.” He watched-yes, with a little pang of panic, since now he was completely on his own-as the hatch closed and locked. “You’re a solo space pilot now, Colwin.”
“Roger,” Colwin said in a slightly squeaky voice.
Boomer maneuvered himself toward the front of the docking cradle, where he could watch the spaceplane enter the spade, being careful to keep out of Colwin’s sight so she wouldn’t be distracted. “How is she doing, Noble?” Raydon radioed on the secondary frequency so Colwin couldn’t hear them.
“Very slow and cautious, but I can’t fault her for that,” Boomer replied.
“Think this was a good idea, you leaving her alone like that?”
“Back when I was at MIT getting my Ph.D. I remember when my Aero Club instructor pilot at Hanscom Air Force Base told me to pull my Piper Warrior over so he could hop out and I could do my first solo,” Boomer said. “He didn’t give me any warning-one minute he was sitting there, and the next minute the seat was empty.”
“Every pilot experiences that.”
“I know, but I thought I was such hot shit impressing the instructor that I never thought about soloing,” Boomer said. “Then when it happened so suddenly, I never felt more scared and alone. I sat there until the ground controller told me to taxi for takeoff or park it back on the ramp. I finally shook it off, flew once around the pattern, and landed. I was scared shitless, but I did it.”
“This is a whole lot different.”
“If she screws up, they’ll say it was the wrong decision,” Boomer said. “But she won’t.”
Boomer had his doubts as he watched the Midnight slide forward into the cradle-he thought Colwin could’ve gotten it a little straighter and perhaps a little lower, and she was certainly slow-but eventually she got it into position. The nose of the XS-19 contacted the large docking “donut” dead center and barely recoiled as the 170,000-pound spacecraft came to a stop. “Zero closure rate, Armstrong,” she announced. “Grapple ring extended, ready for capture.”