S P N O R Magneto and distributor venting....................................4-7 Magneto-ignition system operating principles...............4-2 Magneto-ignition timing devices .................................4-23 Magneto mounting systems .........................................4-10 Main fuel pumps (engine driven).................................2-43 Main line strainers........................................................2-34 Main metering system..................................................2-11 Maintenance and inspection of ignition leads..............4-28 Manifold and augmentor exhaust assembly.................3-24 Mechanical efficiency..................................................1-36 Mixture control system ................................................2-13 Mounting lugs ................................................................1-7 Muffler and heat exchanger failures ............................3-25 Pressure injection carburetors ......................................2-15 Pressure warning signal ...............................................2-34 Primary electrical circuit................................................4-4 Propeller reduction gearing..........................................1-24 Propeller shafts.............................................................1-24 Propulsive efficiency ...................................................1-37 Protection against chafing............................................4-53 Protection against high temperature.............................4-53 Protection against solvents and fluids..........................4-54 Protection of wires in wheel well area.........................4-54 Pumps...........................................................................2-33 Push rod .......................................................................1-21 Naturally aspirated induction systems ...........................3-1 Newton’s Third Law of Motion.....................................1-2 Radial engine exhaust collector ring system................3-23 Ram recovery ...............................................................1-62 Reciprocating engines....................................................1-5 Accessory gear trains..................................................1-7 Accessory section .......................................................1-7 Crankcase sections .....................................................1-5 Design and construction .............................................1-5 Exhaust systems .......................................................3-22 Collector system ...................................................3-23 Maintenance practices ..........................................3-24 Short stack system ................................................3-23 Ignition systems..........................................................4-1 Maintenance and inspection .................................4-22 Induction systems .......................................................3-1 Operating principles .................................................1-24 Power and efficiencies..............................................1-28 Starting systems..........................................................5-2 Maintenance practices ............................................5-7 Regulator section .........................................................2-22 Regulator unit...............................................................2-16 Relays...........................................................................4-69 Reliability.......................................................................1-3 Removal, maintenance, and installation of ignition  system components ......................................................4-43 Igniter plugs..............................................................4-44 Ignition system leads ................................................4-44 Replacement of ignition harness..................................4-29 Rigging carburetor controls .........................................2-30 Rocker arms .................................................................1-22 Roller bearings .............................................................1-23 Routing.........................................................................4-53 Precautions ...............................................................4-54 Secondary electrical circuit............................................4-6 Selector valves .............................................................2-33 Performing ignition system checks..............................4-27 Pistons ..........................................................................1-12 Construction .............................................................1-12 Displacement ............................................................1-29 Position indicators ....................................................4-24 Rings.........................................................................1-14 Compression .........................................................1-14 Construction..........................................................1-14 Oil control.............................................................1-14 Oil scraper.............................................................1-14 Plain bearings...............................................................1-23 Plain-type connecting rods...........................................1-12 PLA potentiometer.......................................................2-37 Power .............................................................................1-2 Powerlink ignition system.................................. 4-13, 4-14 Powerplant electrical systems ......................................4-45 Powerplant selection ......................................................1-3 Pressure ..........................................................................3-1  I-4 Oil fouling of spark plugs ............................................4-30 Operating cycles...........................................................1-26 Diesel cycle ..............................................................1-28 Four-stroke cycle......................................................1-26 Compression stroke ..............................................1-27 Exhaust stroke.......................................................1-28 Intake stroke..........................................................1-27 Power stroke .........................................................1-27 Rotary cycle..............................................................1-28 Two-stroke cycle ......................................................1-28 Operating flexibility.......................................................1-3