tion.

Wire, Lift or Flying--A wire opposed to the direction of lift, and used
to prevent a surface from collapsing upward during flight.

Wire, Anti-lift or Landing--A wire opposed to the direction of gravity,
and used to sustain a surface when it is at rest.

Wire, Drift--A wire opposed to the direction of drift, and used to
prevent a surface from collapsing backwards during flight.

Wire, Anti-drift--A wire opposed to the tension of a drift wire, and
used to prevent such tension from distorting the framework.

Wire, Incidence--A wire running from the top of an interplane strut
to the bottom of the interplane strut in front of or behind it.
It maintains the "stagger" and assists in maintaining the angle of
incidence. Sometimes termed "stagger wire."

Wire, Bracing--Any wire holding together the framework of any part of
an aeroplane. It is not, however, usually applied to the wires described
above unless the function performed includes a function additional to
those described above. Thus, a lift wire, while strictly speaking a
bracing wire, is not usually described as one unless it performs the
additional function of bracing some well-defined part such as the
undercarriage. It will then be said to be an "undercarriage bracing lift
wire." It might, perhaps, be acting as a drift wire also, in which
case it will then be de-scribed as an "undercarriage bracing lift-drift
wire." It should always be stated whether a bracing wire is (1) top, (2)
bottom, (3) cross, or (4) side. If a "side bracing wire," then it should
be stated whether right- or left-hand.

Wire, Internal Bracing--A bracing wire (usually drift or anti-drift)
within a surface.

Wire, Top Bracing--A bracing wire, approximately horizontal and situated
between the top longerons of fuselate, between top tail booms, or at the
top of similar construction.

Wire, Bottom Bracing--Ditto, substituting "bottom" for "top."

Wire, Side Bracing--A bracing wire crossing diagonally a side bay of
fuselage, tail boom bay, undercarriage side bay or centre-section side
bay. This term is not usually used with reference to incidence wires,
although they cross diagonally the side bays of the cell. It should be
stated whether right- or left-hand.

Wire, Cross Bracing--A bracing wire, the position of which is diagonal
from right to left when viewing it from the front of an aeroplane.

Wire, Control Bracing--A wire preventing distortion of a controlling
surface.

Wire, C