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165
The Aeroplane Speaks. Fifth Edition
·
H. Barber
143
=Energy=--Stored
work.
For
instance,
a
given
weight
of
coal
or
petroleum
stores
a
given
quantity
of
energy
which
may
be
expressed
in
foot-pounds.
=Extension=--That
part
of
the
upper
surface
extending
beyond
the
span
of
the
lower
surface.
[9]
=Edge,
Leading=--The
front
edge
of
a
surface
relative
to
its
normal
direction
of
motion.
[10]
=Edge,
Trailing=--The
rear
edge
of
a
surface
relative
to
its
normal
direction
of
motion.
[11]
=Factor
of
Safety=--Usually
taken
to
mean
the
result
found
by
dividing
the
stress
at
which
a
body
will
collapse
by
the
maximum
stress
it
will
be
called
upon
to
bear.
=Fineness=
(of
stream-line)--The
proportion
of
length
to
maximum
width.
=Flying
Position=--A
special
position
in
which
an
aeroplane
must
be
placed
when
rigging
it
or
making
adjustments.
It
varies
with
different
types
of
aeroplanes.
Would
be
more
correctly
described
as
"rigging
position."
=Fuselage=--That
part
of
an
aeroplane
containing
the
pilot,
and
to
which
is
fixed
the
tail-plane.
[12]
=Fin=--Additional
keel-surface,
usually
mounted
at
the
rear
of
an
aeroplane.
[13]
=Flange=
(of
a
rib)--That
horizontal
part
of
a
rib
which
prevents
it
from
bending
sideways.
[14]
=Flight=--The
sustenance
of
a
body
heavier
than
air
by
means
of
its
action
upon
the
air.
=Foot-pound=--A
measure
of
work
representing
the
weight
of
1
lb.
raised
1
foot.
=Fairing=--Usually
made
of
thin
sheet
aluminium,
wood,
or
a
light
construction
of
wood
and
fabric;
and
bent
round
detrimental
surface
in
order
to
give
it
a
"fair"
or
"stream-like"
shape.
[15]
=Gravity=--Is
the
force
of
the
Earth's
attraction
upon
a
body.
It
decreases
with
increase
of
distance
from
the
Earth.
See
"Weight."
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