But in the end, it was the central computer that actually flew the FRX00. The ADC was simply a backup subsystem for the MADC in the central computer.
Major Booker manually fed mock signals into the ADC and throttle control, looking for any abnormalities.
All clear.
As the self-tests carried out by Yukikaze’s central computer—which could be called Yukikaze herself—agreed with Major Booker’s tests, checklist items on the display panel vanished one by one. MADC, ADC1, ADC2, ALS, AFCS, and so on.
The readout for the AICS, or Air Intake Control System, stayed lit. The only way to check that was to manually run the test program.
The AICS optimized the amount of air taken into the engines for maximum efficiency. When flying supersonic, the engine air intakes generated a variety of shock waves. In order to stabilize them, the intake ports contained movable ramps. As the plane transitioned from low speed to subsonic, transonic, and supersonic speeds, these ramps deployed in the intake ports to control the rate of air flow and the resulting shock waves. Their position was determined by the aircraft’s rate of speed. In simple terms, it was programmed to make a constant change in proportion to air speed, not perform complex control actions due to altitude like the MADC. For that reason, the central computer didn’t control them directly, relieving it of the burden.
Even in the event of AICS failure, flight was still possible. Since its program was a simple function of speed, it was very reliable. If any failures were going to occur, it’d be in the hydraulic actuators that moved the ramps. Since it was a simple mechanical system, it didn’t have an advanced monitoring system hooked up to the central computer. Parts like that require a more careful preflight check, the major thought as he confirmed the AICS program results.
All aircraft checks were now complete. All that was left was to set the master arm switch for the weapon stores. Those consisted of a gun, eight medium-range missiles, and eight short-range missiles. The air-to-air missiles’ safeties had already been released by the ground crew. Major Booker called up Yukikaze’s central computer to confirm her mission once more.
He set the communications system to auto, then called SAF headquarters using a headset mic. STC, the tactical computer in HQ, linked up to Yukikaze’s central computer. Major Booker reissued the orders into the mic to confirm the mission. STC translated his request for Yukikaze.
Mission number, takeoff time, return essentials, IDs for units participating in the operation, recon essentials, navigation support, armament restrictions, weather, and mission airspace… On and on and on. Yukikaze hadn’t looked particularly happy when he programmed the data into her before, which was a strange thought as she had no way to make any expressions. Still, from the way she displayed the confirmations, it felt to Major Booker like she was telling him to hurry up and let her take off. Items scrolled down one after another, too fast for him to read.
“Okay, Yukikaze. You can take off once I’m out of here.”
Weapons master arm switch set to ON. The onboard arms display came on. All weapons were free to use. Yanking the headset cord from its onboard jack, the major climbed down from Yukikaze’s cockpit. Once on the ground, he plugged it back in to a jack on her body and informed the tactical computer back in HQ that all of Yukikaze’s preflight checks had been completed.
Faery base’s runway control computer issued the order for Yukikaze to take off. He could tell this from the sudden increase of noise from the engines. He pulled the headset’s pin from the jack, a small panel door closing over it. The canopy automatically lowered and locked.
Major Booker quickly moved away from Yukikaze, running back to where Rei sat. When he turned back, panting, Yukikaze had already moved out onto the taxiway.
“Look, Rei,” the major said. “You should be riding in there. Yukikaze’s taking off without you. Doesn’t that bother you?”
The noise of the engine was distant. Yukikaze looked small on the end of the runway. Then, just as soon as you’d noticed that the engine roar had increased, she was tearing savagely down the runway.
She trembled like a wild animal showing its antipathy for being grounded. Then, as if thrusting her rage at the earth beneath her, suddenly she was in the air. Quickly retracting her landing gear, Yukikaze initiated a combat climb.
Major Booker had seen all of this. It was summer at Faery base, with thick clouds hanging overhead. Yukikaze vanished into the cloudbank, leaving only the roar of her mighty engines echoing into the sky.
“Major? Major Booker?”
One of the nurses was calling him. When he turned, Rei’s eyes were open, but his gaze was not in the direction of Yukikaze.
He knows, Major Booker thought fiercely. Rei knows. Once the sound of Yukikaze’s engines had faded, Rei closed his eyes again. But this was a good sign. The major was sure of it.
“We’re going down. To the command center,” he said. “Come on, Rei. Let’s see how Yukikaze fights.”
Major Booker indicated to the nurses to follow, and together with Rei he descended back underground, headed for the SAF command center where Yukikaze’s flight status was being monitored.
4
AT TAB-15, THE the FAF’s tactical air base closest to the front, multiple fighter squadrons were scrambling into the air.
The main attack force consisted of the twelve planes of TAB-15’s 505th Tactical Fighter Squadron, flying Sylphid fighters. They were equipped with a minimum air-to-air weaponry loadout consisting of the plane’s gun and four short-range missiles so that they could carry four large air-to-ground missiles as well. Charged with covering the 505th strike team was the 515th assault group, consisting of seventeen Fand IIs.
Confirming his course, 505th team leader First Lieutenant Gavin Mayle headed straight for the JAM base. The team broke into four groups of three planes each. Normally, they’d fly in one formation, but lately they’d lost three planes, one after another. Their best pilot had been Lieutenant Yagashira. Lieutenant Mayle recognized his skill, but at the same time he felt a bit relieved when Yagashira was transferred out of the unit. The realization of this came to him in a flash as he checked the planes flying to his left and right and thought how Yagashira wasn’t in either of them.
Lieutenant Yagashira was the type of man who tried to fight the JAM single-handed. He was a troublemaker. He was just perfect for the SAF. They’d been the ones who yanked him out of his unit. Well, Lieutenant Mayle thought, I owe the SAF thanks. The guy didn’t understand how to fight as part of a team, or maybe it was just that he didn’t want to understand. You could put it in a favorable light by saying that, in a touch-and-go battle, Lieutenant Yagashira was the kind of guy who did everything he could to fly his plane to protect himself. The problem was that there was a part of Yagashira that liked those touch-and-go battles. There were times that his antics endangered not only the formation but the entire strike group. Nobody in the group wanted to fly with him, no matter how good a Sylph driver the guy was.
Normally, a pilot like that would be reassuring to fly with. When your plane gets into trouble, you’d expect him to come swooping in to cover you. And it was true that Lieutenant Yagashira would do that when the occasion arose. On the other hand, thought Lieutenant Mayle, it was also true that Yagashira was the cause of that trouble on many of those occasions. As far as Lieutenant Yagashira was concerned, he was attacking to destroy the JAM, and it was fine when he sent them crashing to the ground with one blow. The trouble was when the JAM who escaped that blow served up their counterattack, because it was Yagashira’s fellow pilots who would usually end up having to swallow it.