Last Updated
：2025/11/25
area rule
Noun
A
rule
stating
that
an
airplane
designed
with
the
same
cross-sectional
area
distribution
in
the
longitudinal
direction
as
the
Sears-Haack
body
generates
the
same
wave
drag
as
this
body,
largely
independent
of
the
actual
shape;
used
in
aerodynamics
to
reduce
drag,
typically
by
narrowing
the
fuselage
at
the
wing
roots.
Japanese Meaning
エリアルールとは、航空機の設計において、縦方向の断面積分布がSears‐Haack体と同一となるように設計された場合、その実際の形状に関わらず同等の波動抵抗を発生するという原理を指す。主に、機体抵抗を低減するために、主翼付近で胴体を狭くする設計に利用される法則である。
Sense（1）
A
rule
stating
that
an
airplane
designed
with
the
same
cross-sectional
area
distribution
in
the
longitudinal
direction
as
the
Sears-Haack
body
generates
the
same
wave
drag
as
this
body,
largely
independent
of
the
actual
shape;
used
in
aerodynamics
to
reduce
drag,
typically
by
narrowing
the
fuselage
at
the
wing
roots.
Quizzes for review
A rule stating that an airplane designed with the same cross-sectional area distribution in the longitudinal direction as the Sears-Haack body generates the same wave drag as this body, largely independent of the actual shape; used in aerodynamics to reduce drag, typically by narrowing the fuselage at the wing roots.
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See correct answer
area rule
When designing the slender fuselage, engineers applied the area rule to minimize transonic wave drag by matching the longitudinal cross-sectional area distribution to that of the Sears–Haack body.
See correct answer
When designing the slender fuselage, engineers applied the area rule to minimize transonic wave drag by matching the longitudinal cross-sectional area distribution to that of the Sears–Haack body.
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