The Petrol Engine / A Text-book dealing with the Principles of Design and Construction, with a Special Chapter on the Two-stroke Engine

by Francis John Kean

INDEX

• A
• Acceleration, quick, [78]
• — under load, [92]
• Accessibility, [39], [50]
• Accumulator, [61]
• Adapter, [92]
• Adjustable tappet head, [29], [30]
• Adjusting screws, [19]
• Advanced ignition, [55], [56], [59]
• Aeroplane engine cylinder, [10], [16]
• Air, [1], [41], [42], [46], [87], [89], [114]
• — carburetted, [42], [97]
• — lock, [72]
• — pump, [50]
• — — hand, [50]
• — scavenging, [16], [35], [84], [85], [87], [88], [89]
• — to petrol ratio, [42]
• — valve, automatic extra, [43], [49]
• — velocity, [46], [70]
• — volume of, relative to petrol vapour, [42], [108]
• — weight of, relative to petrol vapour, [42]
• Alcohol, properties of, [109]
• Anti-freezing solution, [72]
• Armature of magneto, [52], [54]
• — relative speeds of engine and magneto, [54], [55]
• Atmospheric pressure, [3], [90]
• Atomization of petrol, [48], [49]
• Automatic extra-air valve, [43], [49]
• — inlet valve, [82], [84], [88]
• B
• Backfire, [62], [84]
• Balance, perfect, [76]
• — want of, [75], [76]
• — weight, [25]
• Balancing the crankshaft, [25], [26], [76]
• Barrel of cylinder, [12]
• Base, oil, [8], [40], [65]
• Battery, [116]
• Bearings, main, [24], [64]
• Benzol, properties of, [45], [108]
• Blade, trembler, [57]
• Boiling of water in jackets, [72]
• Boxes, core, [11]
• Brake, for petrol engine, [100]
• Brake horse-power, [99]
• British thermal unit, [111]
• Brush, carbon, [53], [55], [116]
• Built-up cylinder, [16]
• — flywheel, [27]
• Buoyancy, [45]
• Burning, rate of, of mixture, [1], [57]
• — of deflector, [91]
• Bursting of flywheel rim, [27]
• Bush, phosphor bronze, [23]
• C
• Cables, high tension, [61]
• Calorific values, [111]
• Cam, [30], [33]
• Camshafts, [29], [33], [40]
• Cams, stationary, for magneto, [53]
• Capacity of cylinder, [106]
• Caps, valve, [13], [31]
• Carbon brush, [53], [55], [116]
• — deposit, [63], [78]
• Carburation, [42], [94]
• Carburetted air, [42], [97]
• Carburettor, [5], [8], [42], [82]
• — jet type, [42]
• — multiple jet, [47], [94]
• — points of a good, [49]
• — recent improvements in, [47]
• — spray type, [42]
• — surface type, [42]
• — wick type, [42]
• Castings, cylinder, [11]
• Cast-in-pairs, cylinders, [16]
• Centrifugal force, [27]
• Chaindrive, silent, [38]
• Charge, [3], [80]
• Charging pump, [80]
• Chassis, [40], [71]
• Choke tube, [46], [47]
• Chrome steel, [20], [36]
• Circulating water pump, [8], [71]
• Circulation, forced, [71]
• — local, [73]
• — pump, [71]
• — thermo-syphon, [69]
• Clearance between piston and
• cylinder walls, [17]
• — of valve tappet, [29]
• — space, [4], [105], [107]
• Coil ignition, [57], [59], [61]
• — — system, wiring diagram for, [61]
• — non-trembler, [59]
• — supplementary, for starting, [58]
• — trembler pattern, [57], [61]
• Collector ring, [55]
• Combustion, [78]
• — chamber, [4], [96]
• Compensating jet, [48]
• Compression, meaning of, [3]
• — pressure, [82], [83], [105]
• — stroke, [6], [80]
• Cone clutch, [27]
• Connecting rod, [4], [21], [96]
• — — forces acting on, [20]
• — — phosphor bronze, [20], [22]
• — — steel, [23]
• Consumption of fuel, [79]
• — of oil, [67]
• Contact breaker, low tension, [53]
• — — wipe form of, [58]
• — screws, platinum tipped, [53], [57]
• Cooling, [69]
• Core-boxes, [11]
• Core, iron, of ignition coil, [57]
• Cost of production, [22], [64], [79]
• Cotter, [29]
• Crank chamber, [8], [39]
• — — gas-tight, [81], [82], [96]
• — cheeks or webs, [24]
• — motor-cycle, [23]
• — pin, [24]
• — radius, [4]
• — shaft, [23], [28], [77], [89]
• Crank shaft, balancing the, [25], [76]
• — — vibration of, [76]
• — — whipping of, [76]
• Cushion of hot gas, [93], [96]
• Cut-out, [90]
• Cycle, four-stroke, [5]
• — motor, [10], [11]
• — Otto, [5]
• — two-stroke, [80]
• Cylinder, [5], [9]
• — aeroplane engine, [15], [16]
• — air-cooled, [11], [15]
• — barrel, [12]
• — built-up, [16]
• — castings, [11]
• — head, detachable, [32], [78]
• — jackets, [12], [15], [69]
• — L-headed, [16]
• — pump, [87], [88], [107]
• — revolving, [10]
• — T-headed, [15]
• — water-cooled, [8], [32], [82], [96]
• — working, [81], [87], [107]
• Cylinders, cast en bloc, [16], [77]
• — cast in pairs, [16]
• — cast separately, [16]
• — choosing the number of, [75]
• — firing order of, [60]
• D
• Dead centre, [4], [116]
• — gases, [83]
• Defective coil, [114], [116]
• — ignition system, [114]
• — magneto, [114], [116]
• — sparking plug, [113], [114]
• — valve, [113], [114], [116]
• Deflector, [81], [87], [93], [96]
• — overheating of, [84], [91]
• Density, [45], [111]
• Deposit of carbon, [63], [78]
• Description of a typical petrol engine, [8]
• Detachable cylinder head, [32], [78]
• Devices, ignition, [51]
• Diagram, indicator, [92], [102]
• — for four-stroke engine, [105]
• — for two-stroke engine, [106]
• — for valve setting, [116]
• — work, [103]
• Difficulties in starting, [72], [75], [92], [96], [113]
• Discharge, spark, [51], [54], [58]
• Distributor, high tension, [52], [53], [58]
• Double sleeve engine, [32], [78]
• Down stroke, [4], [81], [82]
• Drawings, working, [11], [93]
• Drip feed, [64], [90], [92]
• Drive, silent chain, [38]
• Dual ignition, [58]
• — springs, [90]
• Ducts for oil, [41]
• Duplex piston, [86]
• Durability, [49], [79]
• E
• Earthing wire, [60]
• Eccentric, [33], [36]
• — rod, [33], [36]
• — sheaves, [33], [36]
• — straps, [33], [36]
• Economy and durability, [79]
• Efficiency, thermal, [110], [111]
• — volumetric, [83], [86], [88]
• Electric spark, [51], [54], [58]
• Electrodes of sparking plug, [51], [91], [92]
• Engine, four cylinder, [9], [76], [77], [94]
• — internal combustion, [111]
• — motor car, [9]
• — multi-cylinder, [77]
• — points of a good, [75]
• — single cylinder, [75]
• — six cylinder, [76], [77]
• — troubles, [113]
• — two cylinder, [76]
• — two-stroke, [80], [95]
• Evaporation, [1]
• Exhaust pipe, [6]
• — ports, [81], [88]
• — — open, [81], [88], [96]
• — smoky, [66]
• — stroke, [7], [35]
• — system, overheating of the, [57]
• — valves, [5], [10], [37], [81]
• — valves, timing of the, [35], [37], [78], [116]
• Explosion stroke, [7], [21], [26], [35]
• Explosive mixtures, [1], [108], [109], [110]
• Extra-air valve, [43], [49], [94]
• F
• Fan, [70]
• — pulley, [8], [70]
• Feed, drip, [64], [90], [92]
• Fibre, tappet head, [30]
• — wheel, [38]
• Film of oil, [65]
• Filter, petrol, [43]
• Fins, heat radiating, [70]
• Firing order of the cylinders, [60]
• — stroke, [60]
• Fixed ignition, [57]
• Flanges, [12], [13]
• Flash point of lubricating oils, [63], [67], [68]
• Flashing back from exhaust, [84], [92], [93], [95]
• Flexibility, [77], [83], [92]
• Float chamber, [43], [44], [94]
• Flooding, [45], [94]
• Fluctuation of engine speed, [27]
• Flywheel, [8], [26]
• — built-up, [27]
• — function of, [26]
• — rim, bursting of, [27]
• — single stamping of steel, [28]
• Force, [98]
• — centrifugal, [27]
• Forced circulation, [71]
• — lubrication, [65], [90]
• Forces, inertia, [75]
• — space diagram, [103]
• Four cylinder engine, [9], [76], [77], [94]
• — stroke cycle, [5]
• Frequency of vibrations, [76]
• Fuel, consumption of, [79]
• Fuels, liquid, [108]
• Furring of tubes and jacket spaces, [73]
• G
• Gap of sparking plug, [51], [54]
• Gas, compressing the, [3]
• — pump, [80]
• — tight crankchamber, [81], [82], [96]
• Gearing, overhead, [16]
• Gears, helical, [38]
• —spur, [37], [38]
• General overheating, [72], [73]
• —principles, [1]
• Gilled tube, [70], [74]
• Gills, [70]
• Gravity feed, [50]
• Grease in cylinder jackets, [72]
• Grinding in a valve, [31]
• Gudgeon pin, [17], [18]
• — — wear on, [19], [90]
• Guides, valve stem, [8], [12], [13], [30]
• H
• Hand air pump, [50]
• Handle, starting, [71]
• Head, adjustable tappet, [30]
• — of water, [69], [71]
• Heat efficiency, [112]
• — energy of the petrol mixture, [9], [17], [111]
• — radiating fins, [11], [70]
• — surplus, [9], [17]
• Helical teeth, [38]
• High tension cables, [61]
• — — distributor, [52], [54], [58]
• — — magneto, [8], [51], [52], [54], [89]
• — — terminals, [51], [57]
• Holes, cotter, [29]
• — oil, [63]
• Honeycomb radiator, [70], [74]
• Horse-power, [98]
• — brake, [99]
• — indicated, [101]
• — Joint Committee’s formula, [101]
• — of car, [99]
• — Treasury formula, [101]
• Hot-water jacket, [43], [47], [94]
• Hydrogen, [108], [109]
• I
• Idle stroke, [26], [82]
• Ignition, advanced, [55], [56], [59]
• — coil, [57], [59], [61]
• — devices, [51]
• — dual, [58]
• — fixed, [57]
• — knock, [57], [84]
• — normal, [55]
• — retarded, [55], [59], [62]
• — synchronized, [59], [61]
• — timing the, [60], [62], [116]
• — two-point, [59]
• Improved system of splash lubrication, [64]
• Improvements in carburettors, recent, [47]
• Indicated horse-power, [101]
• Indicator diagram, [92], [102]
• — — for four-stroke engine, [105]
• — — for two-stroke engine, [106]
• Indicator, optical, [92]
• Induction pipe, [5], [8], [43], [82]
• Inertia forces, [75]
• Inflammable vapour, [63]
• Injection of water to cylinder, [92]
• Inlet ports, [81], [88]
• — valve, air, automatic, [43], [49], [88]
• — — automatic, for gaseous mixture, [82], [88]
• — — mechanically operated, [5], [30], [31]
• — — timing the, [34], [37], [78], [116]
• — water pipe, [8], [70], [73]
• Inspection openings, [39]
• Insulators, [51]
• Internal water cooling, [92]
• J
• Jacket, cylinder, [12], [15], [69]
• — hot water, [43], [47], [94]
• — space, too large, [73]
• — water, overheating of, [72]
• — — temperature of, [74]
• — — weight of, [74], [89]
• Jet, atomizing, [48]
• — compensating, [48]
• — petrol, [44], [46]
• Jet-in-tube carburettor, [42]
• Jigs, [24]
• Jockey pulley, [38]
• Joints, water-tight, [11], [15]
• Journals, [24]
• K
• Kean’s two-stroke engine, [85], [94]
• Knock ignition, [57], [73], [84]
• Knocking, acceleration, [92], [93], [95]
• — intermittent, [84], [92], [93]
• — spasmodic, [84], [91]
• L
• L-headed cylinders, [16]
• Lag in opening and closing valves, [34]
• — time, [56]
• Lead of valve, [35]
• Leakage of gas past the piston, [18], [114]
• Leaky pistons, [114]
• Liquid fuels, [108]
• — petrol, [108]
• Local circulation, [73]
• — overheating, [72]
• Lock, air, [72]
• Lock nuts, [29]
• Low tension contact breaker, [52]
• — — terminal, [57], [58]
• — torque, [75]
• Lubrication, forced, [65], [90]
• — improved system of splash, [64]
• — splash system of, [63]
• M
• Magneto armature, relative speeds of, [54], [55], [94]
• — for four cylinder engine, [52], [54], [60]
• — for six cylinder engine, [54]
• — high tension, [8], [39], [40]
• — ignition system, wiring diagram for, [60]
• — racing pattern, [94]
• — two-stroke engine, [94]
• Make and break, [53], [58], [62]
• Manograph, [104]
• Materials, packing, [15]
• Mean effective pressure, [89], [107]
• Mechanically operated valve, [30], [84]
• Metal segments of distributor, [55]
• Mild steel, [23]
• Mileage per gallon, [110]
• Misfiring, [84], [116]
• Mixing chamber, [43], [47]
• Mixture, explosive, [1], [108], [109], [110]
• — heat energy of the, [9], [17], [111]
• — strength of the [1], [42], [108], [109], [110]
• — too weak a, [46]
• — weakening the, [49], [73]
• Momentum, [35], [36]
• Monobloc casting, [77]
• Motor car engine, [9]
• — cycle, [10], [11]
• — — crank, [23]
• Moulds, [11]
• Multiple jet carburettor, [47], [94]
• Mushroom type valves, [5], [8], [30]
• N
• Natural circulation, [69]
• Needle valve, [44]
• Nickel steel, [20], [36]
• Noise from valves, [30], [39]
• Non-trembler coil, [59]
• Normal ignition, [55]
• O
• Oil base, [8], [40], [65]
• — consumption of, [67]
• — ducts, [41]
• — film, [65]
• — holes, [63]
• — pressure, [65], [67]
• — price of, [67]
• — properties of, [63]
• — pump, [8], [39], [40], [65], [67]
• — — speed of, [67]
• — troughs, [65]
• Open exhaust port, [81], [88], [96]
• Optical indicator, [92]
• Orifice, [45], [73]
• Oscillations, torsional, of the crankshaft, [77]
• Otto cycle, [5]
• Outlet water pipe, [8], [70], [71], [73]
• Overflow pipe, [72]
• Overhead gearing, [16]
• Overheating of deflector, [84], [91]
• — of the exhaust system, [57]
• — general, [72], [73]
• — local, [72]
• Overloading the engine, [55], [89]
• P
• Packing materials, [15]
• — rings, [17], [18], [81], [87], [97]
• Paraffin, properties of, [109]
• Partial seizure, [19], [33], [63], [64], [90]
• — vacuum, [6], [46], [82], [90]
• Passages, valve, [10]
• Patterns, [11]
• Perfect balance, [76], [77]
• — combustion, [78]
• Periodicity, [76], [77]
• Petrol, consumption of, [79]
• — engine, description of a typical, [8]
• — filter, [43]
• — jet, [44], [46]
• — mixture, heat energy of, [9], [17], [111]
• — pipe, [43]
• — properties of, [108]
• — supply, failure of, [113]
• — tank, [43]
• — tap, [43]
• — vapour, [1], [42], [43], [80]
• — — ratio of air to, [42]
• Phosphor bronze bush, [23]
• — — connecting rod, [22]
• Pinking, [79]
• Pipe, exhaust, [6], [8]
• — induction, [5], [8], [43], [82]
• — inlet water, [8], [70], [71], [73]
• — outlet water, [8], [70], [71], [73]
• — overflow, [72]
• — transfer, [86], [87]
• — vent, [39]
• Piston, [4], [17], [32], [82], [96]
• — duplex, [86]
• — leaky, [73], [114]
• — ring, cast-iron, [18], [82]
• — — steel, [19]
• — seizure of the, [19], [33]
• — steel, [19]
• — weight of, [19]
• Pitch of the teeth on a gear wheel, [38]
• Plain tube radiator, [74]
• Platinum tipped contact screws, [53], [57]
• Plug, sparking, [5], [8], [51], [91], [92]
• Points of a good carburettor, [49]
• — — good engine, [75]
• Poppet valve, [29], [77], [79]
• Ports, exhaust, [33], [78], [81], [88]
• — inlet, [33], [78], [81], [88]
• — open exhaust, [81], [88], [96]
• Power, [98]
• — stroke, [7], [60], [80]
• Pre-ignition, [84], [90], [92], [95], [108], [109], [110]
• Pressure, atmospheric, [3], [90]
• — compression, [3], [80], [82], [83], [88], [105]
• — feed, [50]
• — mean-effective, [89], [107]
• — of oil, [65], [67]
• Prices of oils, [67]
• Primary winding, [53], [58]
• Production, cost of, [22], [64], [79]
• Properties of fuels, [108], [109], [110]
• — of oils, [63]
• Pulley, fan, [8], [70]
• — jockey, [38]
• Pump, air, [50]
• — charging, [80]
• — circulating, [8], [67], [71]
• — cylinder, [87], [88], [107]
• — gas, [80]
• — hand air, [50]
• — oil, [8], [39], [40], [65], [67]
• — piston, [86]
• — water, [8], [39], [71]
• Push rod, [29]
• Q
• Quick acceleration, [78], [92]
• — make and break, [53], [59], [62]
• R
• Racing pattern magneto, [94]
• Radiator, gilled tube, [69]
• — honeycomb, [70], [74]
• — size of, [71], [72], [74], [89]
• Rate of burning, [1], [57]
• Rated horse-power, [101]
• Ratio of air to petrol vapour, [42]
• Recent improvements in carburettors, [47]
• Relative speeds of engine and magneto, [54], [94]
• Release of gases, [105]
• Relief valves, [67]
• Residue, [63]
• Retarded ignition, [55], [57], [59], [62]
• Revolving cylinders, [10]
• Ring, packing, [17], [18], [81], [87], [97]
• — steel piston, [19]
• Roller, [29], [58]
• Rotary valves, [79]
• S
• Sagging of camshaft, [36]
• Scavenging, [16], [35], [84], [85], [87], [88], [89], [93]
• Scoops, [65]
• Screws, adjusting, for gudgeon pin, [18]
• — platinum tipped, for contact breaker, [53], [57]
• Seat of valve, [13], [29]
• Segments, metal, of distributor, [55]
• Seizure of piston, [19], [33], [63], [64], [90]
• Shafts, eccentric, [33]
• Sheaves, eccentric, [33]
• Short-circuiting terminal, [55]
• Silence in running, [79], [92], [95]
• Silencer, [6], [89]
• Silent chain drive, [38]
• Simple two-stroke engine, [81], [85]
• Single cylinder engine, [75], [76]
• — sleeve valve engine, [32]
• — throw crankshaft, [23]
• Six cylinder engine, [76]
• — — — magneto for, [54]
• Sleeve valves, [32], [77], [78]
• Sleeves, double, [32], [78]
• Slots, [32]
• Smoky exhaust, [66]
• Spark, electric, [51], [54], [58]
• Sparking plug, [5], [8], [13], [51], [91], [92]
• Spasmodic knocking, [84], [91]
• Specific gravity of fuels, [108], [109], [110]
• Speed, fluctuation of engine, [27]
• — of oil pump, [67]
• Speeds of magneto armature and
• distributor, [54], [55], [94]
• Splash system of lubrication, [63]
• — — — improved, [64]
• Split pin, [19]
• Spray type of carburettor, [42]
• Springs, dual, for automatic valve, [90]
• — valve, [8], [29], [90]
• Sprocket wheels, [38]
• Spur gears, [38]
• Stampings for connecting rods, [22]
• Starting difficulties, [72], [75], [92], [96]
• — handle, [8], [71]
• Stationary cams for magneto, [53]
• Steel, chrome nickel and chrome vanadium, [20], [36]
• — flywheel, built-up, [27]
• — — single stamping, [28]
• — mild, [23]
• — pistons, [19]
• — — rings, [19]
• — tungsten, for valves, [30]
• — Ubas, [90]
• Storage of petrol, [108]
• Strap, eccentric, [34]
• Strength and character of spark, [58]
• — of mixture, [1], [42], [108], [109], [110]
• Stroke, meaning of, [3]
• — suction, [6], [21], [35], [60], [80]
• Suction, meaning of, [2]
• Supplementary coil, for starting, [58]
• Surface carburettor, [42]
• Synchronized ignition, [59], [61]
• T
• Tank, petrol, [43]
• Tap, compression, [13]
• — petrol, [43]
• Tappet head, [29], [30]
• — valve, [8], [29]
• Teeth, helical, [38]
• — pitch of, [38]
• Temperature of jacket water, [74]
• Terminals, high tension, [51], [57]
• — low tension, [57], [58]
• T-headed cylinder, [15]
• Thermal efficiency, [110], [111]
• — unit, British, [111]
• Thermo-syphon circulation, [69], [89]
• Three-port two-stroke engine, [97]
• Throttle valve, [44], [47]
• Time lag, [56]
• Timing the ignition, [60], [62], [116]
• — the inlet valve, [34], [37], [78], [116]
• — the exhaust valve, [35], [37], [78], [116]
• — wheels, [8], [37]
• Too rich a mixture, [46], [78]
• Too weak a mixture, [46], [73], [78]
• Torque, low, [75]
• Torsional oscillations of crankshaft, [77]
• Transfer pipe, [86], [87]
• Treasury rating for horse-power, [85], [101]
• Trembler blade, [57]
• — coil, [57], [61]
• Troughs, oil, [65]
• Tube, amount required for radiator, [74]
• — gilled, [74]
• — plain, [74]
• Tungsten-steel valves, [30]
• Twin piston two-stroke engine, [96]
• Two cylinder engine, [76]
• Two-point ignition, [59]
• Two-port two-stroke engine, [81], [85], [95]
• Two-stroke cycle, [80], [83], [87]
• — engine, Kean, [85], [94]
• — — simple, [81], [85]
• — — twin piston, [96]
• — — two-port, [81], [85], [95]
• — — three-port, [97]
• — — valveless, [97]
• U
• Ubas steel, [90]
• Unbalanced mass, [25]
• Underframe, [40]
• Up-stroke, [4], [81]
• V
• Vacuum, partial, [6], [46], [49], [82], [90]
• Valve, automatic inlet, [82], [84], [88]
• — — extra air, [43], [49], [88]
• — caps, [13], [31]
• — defective, [113], [114], [116]
• — exhaust, [5], [37], [81]
• — extra air, [43], [49], [94]
• — guides, [8]
• — head, [29]
• — inlet, [3], [5]
• — mechanically operated, [5], [30], [84]
• — mushroom type, [5], [8], [30]
• — needle, [44]
• — passages, [10]
• — relief, [67]
• — seat, [13], [29]
• — springs, [8], [29], [90]
• — stem guides, [8], [12], [13], [29]
• — tappet, [8], [29]
• — throttle, [44], [47]
• — timing the exhaust, [35], [37], [78], [116]
• — — the inlet, [34], [37], [78], [116]
• — to grind in, [31]
• — tungsten steel, [30]
• Valves, noise from, [30], [39]
• — poppet, [29], [77], [79]
• — rotary, [79]
• — sleeve, [32], [77], [79]
• Valveless two-stroke engine, [97]
• Valve-setting diagram, [116]
• Vanadium steel, [20], [36]
• Vaporization, [1], [46], [48], [49], [94]
• Vapour, inflammable, [63]
• — petrol, [1], [33], [42], [80]
• Velocity of air, [46], [70]
• Vent pipes, [39]
• Vibration of crankshaft, [76]
• Viscosity, [63]
• Volatility, [108]
• Volume displaced by piston, [105], [106], [107]
• — of clearance space, [4], [105], [107]
• Volumetric efficiency, [83], [86], [88]
• Vulcanite fibre tappet head, [30]
• W
• Washer, [29]
• Waste heat, [9], [17]
• Water boiling in jackets, [72]
• — circulating pump, [8], [67], [71]
• — cooled cylinder, [8], [32], [82], [96]
• — cooling, internal, [92]
• — head of, [69], [71]
• — hot, for jacket, [43], [47], [94]
• — injection, [92]
• — jacket, [10], [12], [70], [72], [73], [96]
• — pipe, inlet, [8], [69], [70], [71], [73]
• — — outlet, [8], [69], [70], [71], [73]
• — pump, [8], [39], [40], [72]
• Water-tight joint, [11], [15]
• Weakening the mixture, [49], [73]
• Wear on gudgeon pins, [19], [90]
• Webs, crank, [24]
• Weight of piston, [19]
• — of water in radiator, [74], [89]
• Weights, balance, [25]
• Wheels, fibre, for timing gear, [38]
• — sprocket, for chain, [38]
• — timing, [8], [34]
• Whipping of crankshaft, [76]
• Wick type of carburettor, [42]
• Winding, primary or low tension, [53], [58], [61]
• — secondary or high tension, [53], [58]
• Wipe form of contact breaker, [58]
• Wire, earthing, [60]
• Wiring diagram for coil ignition system, [61]
• — — for magneto ignition system, [60]
• Work, [98]
• — diagram, [103]
• Working cylinder, [81], [87], [107]
• — drawings, [11], [93]
• Wrist pin, [18]

(PR. 1315.)
Butler & Tanner Frome and London