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165
The Aeroplane Speaks. Fifth Edition
·
H. Barber
20
"Ah!"
said
the
Rudder,
looking
wise,
"it's
in
a
case
like
that
when
I
become
the
Elevator
and
the
Elevator
becomes
me."
"That's
absurd
nonsense,"
said
the
Blackboard,
"due
to
looseness
of
thought
and
expression."
"Well,"
replied
the
Rudder,
"when
the
Aeroplane
is
in
position
A
and
I
am
used,
then
I
depress
or
elevate
the
nose
of
the
machine;
and,
if
the
Elevator
is
used,
then
it
turns
the
Aeroplane
to
right
or
left,
which
is
normally
my
function.
Surely
our
rôles
have
changed
one
with
the
other,
and
I'm
then
the
Elevator
and
the
Elevator
is
me!"
Said
Lateral
Stability
to
the
Rudder,
"That's
altogether
the
wrong
way
of
looking
at
it,
though
I
admit"--and
this
rather
sarcastically--"that
the
way
you
put
it
sounds
rather
fine
when
you
are
talking
of
your
experiences
in
the
air
to
those
'interested
in
aviation'
but
knowing
little
about
it;
but
it
won't
go
down
here!
You
are
a
Controlling
Surface
designed
to
turn
the
Aeroplane
about
a
certain
axis
of
the
machine,
and
the
Elevator
is
a
Controlling
Surface
designed
to
turn
the
Aeroplane
about
another
axis.
Those
are
your
respective
jobs,
and
you
can't
possibly
change
them
about.
Such
talk
only
leads
to
confusion,
and
I
hope
we
shall
hear
no
more
of
it."
"Thanks,"
said
Efficiency
to
Lateral
Stability.
"And
now,
please,
will
you
explain
your
duties?"
"My
duty
is
to
keep
the
Aeroplane
horizontal
from
Wing-tip
to
Wing-tip.
First
of
all,
I
sometimes
arrange
with
the
Rigger
to
wash-out,
that
is
decrease,
the
Angle
of
Incidence
on
one
side
of
the
Aeroplane,
and
to
effect
the
reverse
condition,
if
it
is
not
too
much
trouble,
on
the
other
side."
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