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検索内容:
suicide burn
noun
(astronautics)
A
method
of
soft-landing
a
rocket
with
a
well-timed,
high-thrust
engine
burn
starting
at
the
last
possible
second,
such
that
it
reaches
a
vertical
speed
of
0
at
precisely
or
almost
precisely
the
exact
moment
that
it
touches
the
landing
pad
and
the
engine(s)
shut
down;
often
done
because
a
particular
rocket's
absolute
minimum
thrust
is
greater
than
its
weight
when
near-empty,
rendering
a
hover
or
a
constant-speed
descent
and
touchdown
impossible.
Called
a
"suicide"
burn
because
of
the
extreme
precision
required
in
timing
the
burn.
If
the
rocket
fires
too
early
(or
for
too
long),
it
will
begin
to
climb
(typically
without
leaving
enough
fuel
or
time
to
stop/start
the
engine
for
a
second
powered
descent
attempt).
If
the
engine
fires
too
late
or
cuts
out
early,
it
will
impact
the
landing
pad
at
a
higher
descent
rate
than
planned,
potentially
damaging
or
destroying
the
rocket
and/or
pad.
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