最終更新日:2024/07/28
The second letter of the Greek alphabet (Β, β), preceded by alpha (Α, α) and followed by gamma, (Γ, γ). In modern Greek it represents the voiced labiodental fricative sound of v found in the English words have and vase.
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beta
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beta
noun
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(aviation)
The
range
of
engine
power
settings
in
which
the
blade
pitch
angle
of
a
constant-speed
propeller
is
controlled
directly
by
the
angle
of
the
engine's
throttle
lever
(rather
than
varying
with
engine
torque
and
airspeed
to
maintain
a
constant
propeller
RPM),
allowing
the
propeller
to
be
disked
to
generate
high
drag
and
slow
the
aircraft
quickly.
意味(11)