The Aeroplane Speaks. Fifth Edition

=Cabre=--To fly or glide at an excessive angle of incidence; tail down. =Camber=--Curvature. =Chord=--Usually taken to be a straight line between the trailing and leading edges of a surface. =Cell=--The whole of the lower surface, that part of the upper surface directly over it, together with the struts and wires holding them together. =Centre (Line) of Pressure=--A line running from wing-tip to wing-tip, and through which all the air forces acting upon the surface may be said to act, or about which they may be said to balance. =Centre (Line) of Pressure, Resultant=--A line transverse to the longitudinal axis, and the position of which is the resultant of the centres of pressure of two or more surfaces. =Centre of Gravity=--The centre of weight. =Cabane=--A combination of two pylons, situated over the fuselage, and from which the anti-lift wires are suspended. [5] =Cloche=--Literally "bell." Is applied to the bell-shaped construction which forms the lower part of the pilot's control lever in a Bleriot monoplane, and to which the control cables are attached. =Centrifugal Force=--Every body which moves in a curved path is urged outwards from the centre of the curve by a force termed "centrifugal." =Control Lever=--A lever by means of which the controlling surfaces are operated. It usually operates the ailerons and elevator. The "joy-stick." [6] =Cavitation, Propeller=--The tendency to produce a cavity in the air. =Distance Piece=--A long, thin piece of wood (sometimes tape) passing through and attached to all the ribs in order to prevent them from rolling over sideways. [7]