SFworld 版 (精华区)
发信人: by (春天的小懒虫), 信区: SFworld
标 题: 2010 (19)
发信站: 哈工大紫丁香 (Wed Oct 6 14:41:16 1999), 转信
19
Operation WINDMILL
When Discovery suddenly lit up like the proverbial Christ-
tree, navigation and interior lights blazing from end to
end, the cheer aboard Leonov might almost have been heard
across the vacuum between the two ships. It turned into an
ironic groan when the lights promptly went out again.
Nothing else happened for half an hour; then the observa-
tion windows of Discovery's flight deck began to glow with
the soft crimson of the emergency lights. A few minutes
later, Curnow and Brailovsky could be seen moving around
inside, their figures blurred by the film of sulphur dust.
`Hello, Max - Walter - can you hear us?' called Tanya
Orlova. Both the figures waved instantly, but made no
other reply. Obviously, they were too busy to engage in
casual conversation; the watchers on Leonov had to wait
patiently while various lights flashed on and off, one of the
three Pod Bay doors slowly opened and quickly closed, and
the main antenna slewed around a modest ten degrees.
`Hello, Leonov,' said Curnow at last. `Sorry to keep you
waiting, but we've been rather busy.
`Here's a quick assessment, judging from what we've
seen so far. The ship's in much better shape than I feared.
Hull's intact, leakage negligible - air pressure eighty-five
per cent nominal. Quite breathable, but we'll have to do a
major recycling job because it stinks to high heaven.
`The best news is that the power systems are okay. Main
reactor stable, batteries in good shape. Almost all the
circuit-breakers were open - they'd jumped or been thrown
by Bowman before he left - so all vital equipment's been
safeguarded. But it will be a very big job checking every-
thing before we have full power again.'
`How long will that take - at least for the essential sys-
tems: life-support, propulsion?'
`Hard to say, skipper. How long before we crash?'
`Minimum present prediction is ten days. But you know
how that's changed up - and down.'
`Well, if we don't run into any major snags, we can haul
Discovery up to a stable orbit away from this hellhole - oh,
I'd say inside a week.'
`Anything you need?'
`No - Max and I are doing fine. We're going into the
carousel now, to check the bearings. I want to get it running
as soon as possible.'
`Pardon me, Walter - but is that important? Gravity's
convenient, but we've managed without any for quite a
while.'
`I'm not after gravity, though it will be useful to have
some aboard. If we can get the carousel running again, it
will mop up the ship's spin-stop it tumbling. Then we'll be
able to couple our airlocks together, and cut out EVAs.
That will make work a hundred times easier.'
`Nice idea, Walter-but you're not going to mate my ship
to that... windmill. Suppose the bearings seize up and the
carousel jams? That would tear us to pieces.'
`Agreed. We'll cross that bridge when we come to it. I'll
report again as soon as I can.'
No one had much rest for the next two days. By the end
of that time, Curnow and Brailovsky had practically fallen
asleep in their suits, but had completed their survey of
Discovery and found no unpleasant surprises. Both the Space
Agency and the State Department were relieved by the
preliminary report; it allowed them to claim, with some
justification, that Discovery was not a derelict but a tempor-
arily decommissioned United States Spacecraft'. Now the
task of reconditioning had to begin.
Once power had been restored, the next problem was the
air; even the most thorough housecleaning operations had
failed to remove the stink. Curnow had been right in iden-
tifying its source as Food spoiled when refrigeration had
failed; he also claimed, with mock seriousness, that it was
quite romantic. `I've only got to close my eyes,' he asserted,
`and I feel I'm back on an old-time whaling ship. Can you
imagine what the Pequod must have smelled like?'
It was unanimously agreed that, after a visit to Discovery,
very little effort of the imagination was required. The prob-
lem was finally solved - or at least reduced to manageable
proportions - by dumping the ship's atmosphere. Fortu-
nately, there was still enough air in the reserve tanks to
replace it.
One piece of very welcome news was that ninety per cent
of the propellant needed for the return journey was still
available; choosing ammonia instead of hydrogen as work-
ing fluid for the plasma drive had paid off handsomely. The
more efficient hydrogen would have boiled off into space
years ago, despite the insulation of the tanks and the frigid
temperature outside. But almost all the ammonia had re-
mained safely liquified, and there was enough to get the ship
back to a safe orbit around the Earth. Or at least around the
Moon.
Checking Discovery's propellerlike spin was perhaps the
most critical step in getting the ship under control. Sasha
Kovalev compared Curnow and Brailovsky to Don
Quixote and Sancho Panza, and expressed the hope that
their windmill-tilting expedition would end more success-
fully.
Very cautiously, with many pauses for checking, power
was fed to the carousel motors and the great drum was
brought up to speed, reabsorbing the spin it had long ago
imparted to the ship. Discovery executed a complex series of
precessions, until eventually its end-over-end tumble had
almost vanished. The last traces of unwanted rotation were
neutralized by the attitude-control jets, until the two ships
were floating motionless side by side, the squat, stocky
Leonov, dwarfed by the long, slender Discovery.
Transfer from one to the other was now safe and easy, but
Captain Orlova still refused to permit a physical linkup.
Everyone agreed with this decision, for Io was coming
steadily closer; they might yet have to abandon the vessel
they had worked so hard to save.
The fact that they now knew the reason for Discovery's
mysterious orbital decay did not help in the least. Every
time the ship passed between Jupiter and Io, it sliced
through the invisible flux-tube linking the two bodies - the
electric river flowing from world to world. The resulting
eddy currents induced in the ship were continually slowing
it down, braking it once every revolution.
There was no way to predict the final moment of impact,
for the current in the flux-tube varied wildly according to,
Jupiter's own inscrutable laws. Sometimes there were dra-
matic surges of activity accompanied by spectacular electric
and auroral storms around Io. Then the ships would lose
altitude by many kilometres, at the same time becoming
uncomfortably hot before their thermal control systems
could readjust.
This unexpected effect had scared and surprised everyone
before the obvious explanation was realized. Any form of
braking produces heat, somewhere; the heavy currents in-
duced in the hulls of Leonov and Discovery turned them
briefly into low-powered electric furnaces. it was not sur-
prising that some of Discovery's food supply had been ruined
during the years the ship had been alternately cooked and
cooled.
The festering landscape of Io, looking more than ever like
an illustration from a medical textbook, was only five hun-
dred kilometres away when Curnow risked activating the
main drive, while Leonov stood off at a very respectful
distance. There were no visible effects - none of the smoke
and fire of the old-time chemical rockets - but the two ships
drew slowly apart as Discovery gained speed. After a few
hours of very gentle manoeuvring, both ships had raised
themselves a thousand kilometres; now there was time to
relax briefly, and to make plans for the next stage in the
mission.
`You've done a wonderful job, Walter,' said Surgeon-
Commander Rudenko, putting her ample arm around the
exhausted Curnow's shoulders. `We're all proud of you.'
Very casually, she broke a small capsule under his nose. It
was twenty-four hours before he woke up, annoyed and
hungry.
--
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