broke in Lateral Stability, and affecting
the fashionable Flying Corps stammer, "it would be a h-h-h-o-r-rible
affair! If there were too much Keel-Surface in front, then that gust
would blow the Aeroplane round the other way a very considerable
distance. And the right-hand Surface being on the outside of the turn
would have more speed, and consequently more Lift, than the Surface on
the other side. That means a greater proportion of the Lift on that
side, and before you could say Warp to the Ailerons over the Aeroplane
would go--probable result a bad side-slip" (see illustration A,
over-leaf).

"And what can the Pilot do to save such a situation as that?" said
Efficiency.

"Well," replied Lateral Stability, "he will try to turn the Aeroplane
sideways and back to an even keel by means of warping the Ailerons or
little wings which are hinged on to the Wing-tips, and about which you
will hear more later on; but if the side-slip is very bad he may not be
able to right the Aeroplane by means of the Ailerons, and then the only
thing for him to do is to use the Rudder and to turn the nose of the
Aeroplane down and head-on to the direction of motion. The Aeroplane
will then be meeting the air in the direction it is designed to do so,
and the Surfaces and also the controls (the Rudder, Ailerons, and
Elevator) will be working efficiently; but its attitude relative to the
earth will probably be more or less upside-down, for the action of
turning the Aeroplane's nose down results, as you will see by the
illustration B, in the right wing, which is on the outside of the
circle, travelling through the air with greater speed than the left-hand
wing. More Speed means more Lift, so that results in overturning the
Aeroplane still more; but now it is, at any rate, meeting the air as it
is designed to meet it, and everything is working properly. It is then
only necessary to warp the Elevator, as shown in illustration C, in
order to bring the Aeroplane into a proper attitude relative to the
earth."

[Illustration]

"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,
w