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165
The Aeroplane Speaks. Fifth Edition
·
H. Barber
40
A
pilot,
being
only
human,
may
be
able
to
do
two
things
at
once,
but
three
is
a
tall
order,
so
was
this
pilot
relieved
to
find
the
Design
not
at
fault
and
his
craft
a
"natural
glider."
To
correct
this
nose-heavy
tendency
when
the
Engine
is
running,
and
descent
not
required,
the
centre
of
Thrust
is
arranged
to
be
a
little
below
the
centre
of
Drift
or
Resistance,
and
thus
acts
as
a
counter-balance.
But
what
is
this
stream
of
bad
language
from
the
Exhaust
Pipe,
accompanied
by
gouts
of
smoke
and
vapour?
The
engine,
now
revolving
at
no
more
than
one-tenth
its
normal
speed,
has
upset
the
proportion
of
petrol
to
air,
and
combustion
is
taking
place
intermittently
or
in
the
Exhaust
Pipe,
where
it
has
no
business
to
be.
"Crash,
Bang,
Rattle----!----!----!"
and
worse
than
that,
yells
the
Exhaust,
and
the
Aeroplane,
who
is
a
gentleman
and
not
a
box
kite,[13]
remonstrates
with
the
severity
of
a
Senior
Officer.
"See
the
Medical
Officer,
you
young
Hun.
Go
and
see
a
doctor.
Vocal
diarrhoea,
that's
your
complaint,
and
a
very
nasty
one
too.
Bad
form,
bad
for
discipline,
and
a
nuisance
in
the
Mess.
What's
your
Regiment?
Special
Reserve,
you
say?
Humph!
Sounds
like
Secondhand
Bicycle
Trade
to
me!"
Now
the
pilot
decides
to
change
the
straight
gliding
descent
to
a
spiral
one,
and,
obedient
to
the
Rudder,
the
Aeroplane
turns
to
the
left.
But
the
Momentum
(two
tons
at
100
miles
per
hour
is
no
small
affair)
heavily
resents
this
change
of
direction,
and
tries
its
level
best
to
prevent
it
and
to
pull
the
machine
sideways
and
outwards
from
its
spiral
course--that
is,
to
make
it
"side-skid"
outwards.
But
the
Pilot
deflects
the
Ailerons
and
"banks"
up
the
planes
to
the
correct
angle,
and,
the
Aeroplane
skidding
sideways
and
outwards,
the
lower
surfaces
of
the
planes
press
up
against
the
air
until
the
pressure
equals
the
centrifugal
force
of
the
Momentum,
and
the
Aeroplane
spirals
steadily
downwards.
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