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29 Cards in this Set

  • Front
  • Back
Otto Cycle
4 stroke, 5 event cycle
Overhaul Types
top, major
Rebuilt Engine
set to new parts limits (MFG only); engine is "zero timed"
Overhauled Engine
set to SVC limits
TBO
"time b/t overhauls", set by MFG
Valve Overlap
improves engine's volumetric efficiency
Early Overhaul (main cause of)
overheating
Blowby
air leaking from the crankcase, past piston rings
HP relationships
IHP = BHP + FHP
Valve Float
caused by high RPM and valve spring resonance
METO
maximum except takeoff power, same as max continuous power
Critical Altitude
max alt an engine will maintain a given HP
Square Engine
bore = stroke
Ignition
takes place slightly before TDC of compression stroke to improve power stroke efficiency.
Limiting Factor of Compression Ratio
fuel grade/detonation
Prony Brake
used to measure torque
Piston Oil Rings
control, compression, wiper/scraper
Choked Bore
slightly larger dia at the top than at the skirt
Full-Floating
most common piston pin types
Piston-Ring End Gap
allows for heat expansion
Liquid Penetrant Limitation
only reveals surface cracks
Mag Particle Limitation
only works on ferro-magnetic parts
Extended Cylinder Skirts
allows engine to be more compact by having cylinders sit closer to the case
Extra-Long Cylinder Skirts for Inverted Engines
prevents oil from leaking down into the cylinder, helps prevent hydraulic lock
Babbit
soft material typically used in plain berrings
Chrome Plating
wear resistant surface that can be applied to cylinder walls
Metallic Sodium
material used in valves to help dissipate heat
Nitriding
surface hardening process applied to cylinder barrels and crankshaft journals
Stellite
very hard, heat resistant alloy welded to valve faces and tips