• Action and reaction, 5
• Aerofoil, flow of air round, 10
• ——, lift of, 10
• Aeroplane, speed of, 4
• ——, types of, 12-16
• ——: Why does it fly? 1-11
• A frame, 20, 22, 23
• Air, density of, 35, 36
• —— flow, direction of, 5
• —— pressure, 2
• Air-screw, action of, 35
• —— balancing, 38
• ——, calculations for, 36
• ——, efficiency, 35
• ——, four-bladed, making, 133
• ——, laminated, 39
• ——, suitable woods for, 36, 38
• Bamboo planes, 30
• Bending air-screws, 42-46
• Biplane, fitting struts to, 128
• ——, sample twin-screw, 61-68
• Blade width, maximum, 45
• Blériot type monoplane, 18
• Box kite, 138, 139, 140
• Bragg-Smith, 15
• Building airship, 141, 154
• Calculations in designing aeroplane plant, 120
• Camm air-screw, proportions of, 46
• Canard, meaning of, 8
• Carving air-screws, 35-41
• Chauvière type air-screw, 38
• Clarke, T. W. K., 14
• Compressed-air engine, 94-102
• —— ——, container for, 99
• —— ——, crank for, 97, 98
• —— ——, inlet and exhaust, etc., of, 97
• —— ——, pistons for, 98
• Compressed-air engine, testing the container, 100
• —— ——, three-cylinder, 94-103
• —— ——, valve and tap for, 100
• Compressed-air-driven biplane, 104-114
• —— ——, bracing planes of, 115
• —— ——, calculations for, 104-109
• —— ——, flying, 118, 119
• —— ——, inter-struts for, 112
• —— ——, materials for, 106
• —— ——, planes for, 109
• —— ——, tail for, 111
• Designing, general notes on, 120, 123
• Dihedral angle, 7
• Double-winder, 70-72
• Drift and lift, 3, 6
• Efficiency air-screw, 35
• —— formula, 19
• Elastic motor, disadvantages of, 94
• Elevator adjustment, 127
• Equilibrium, 2
• Fairey, 12
• Force of gravity, 2
• Forces acting on kite, 2, 3
• Formula, efficiency, 19
• ——, type, 18
• Four-bladed air-screws, making, 133
• Fuselages, 19-34
• ——, boat-shaped, 24
• ——, box-girder, 26
• ——, distortion, 30
• ——, simple, 28, 29
• ——, single-spar, 26
• Fuselages, twin-screw, 26
• ——, two-membered, 25
• Geared motor for model aeroplane, 134
• General notes, 124-135
• Gravity and pressure, 6, 7, 8
• Gravity, force of, 2
• Hargreaves kite, 132
• Hollow spar, 22
• Houlberg, 14
• Hydro-biplane, 17
• Hydro-monoplane, 87-93
• ——, bearings for, 88
• ——, elevator for, 90
• ——, floats for, 90
• ——, fuselage for, 87
• ——, mainplane for, 88
• ——, weight of, 93
• Hydroplane floats, calculating capacity of, 130
• ——, water surface, 128
• Kite, box, 138, 139, 140
• ——, forces acting on, 2-3
• ——, Hargreaves’, 132
• ——, speed of, 4
• ——, tailless, 136-141
• Lateral stability, 7
• Lift and drift, 3, 6
• —— of aerofoil, 10
• Loading, 44
• —— for aeroplanes, 127
• Longitudinal stability, 8
• Lubricant, 125
• Mann, R. F., 20
• Materials, choice of, 28
• Monoplane, Blériot type, 18
• ——, collapsible, 73-79
• ——, ——, chassis for, 78
• ——, ——, mainplane for, 75
• ——, ——, propellers for, 79
• ——, ——, tail for, 74
• ——, hydro, 87-93
• ——, Ridley, 12
• ——, ——, twin-screw, 54-60
• ——, ——, mainspar for, 54
• ——, ——, propellers for, 58
• ——, tractor, 80-86 (see Tractor monoplane)
• Penaud, Alphonse, 94
• Piano wire, uses of, 30
• Pitch, 35, 36, 39, 42, 44, 45
• —— angles, setting out, 40
• “Plane” and “aeroplane,” meaning of terms, 8
• Planes, bamboo, 30
• ——, cane, 50
• ——, constructing, 47-53
• ——, fixing, 133
• ——, swept-back, 52
• ——, types of, 47
• ——, umbrella ribbing, 50
• ——, wire, making, 50, 51
• ——, wooden, 48
• Plant, calculations for designing, 120
• Pressure and gravity, centres of, 6, 7, 8
• Resistance, air, 3
• Ridley monoplane, 12
• Scale models, building, 32, 34, 121, 122, 123
• Silk, waterproof, 130
• Skid, fitting, 126
• Slip, 35
• Small biplane, driving, 102-103
• Spar sections, 26, 27
• Speed of aeroplane, 4
• Spindles, attaching, 46
• Stability, 29, 124, 125
• ——, lateral, 7, 42
• ——, longitudinal, 8
• Tailless kites, easily made, 136-141
• T frame, 20, 22, 23
• Thrust, 42
• —— required for aeroplane, 11
• Timber, strength of, 29, 30, 32
• Torque, 29, 36, 42
• Tractor hydro-biplane, 17
• ——, monoplane, 80-86
• ——, ——, chassis for, 82
• ——, ——, mainplane for, 84
• ——, ——, mainspar for, 80
• ——, ——, twin-gears for, 84
• Twining, E. W., 14, 17
• —— air-screw, 46
• Twin-screw biplane, simple, 61-68
• —— —— ——, elevator for, 62
• —— —— ——, flying the, 66-68
• —— —— ——, mainspar for, 61
• Type formula, 18
• —— of aeroplanes, 12-18
• Waterproof silk, 130
• Water-surface hydroplane, 128
• Winders for elastic motors, 69-72
• ——, double, 70-72
• ——, push-in-the-ground, 69-70
• Wing bracing, 30

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