lubricating efficiency
51Insect — For the Breed 77 album, see Insects (album). Insect Temporal range: 396–0 Ma …
52Rotary engine — The rotary engine was an early type of internal combustion aircraft engine in which the crankshaft remains stationary and the entire cylinder block revolves around it. The design was used mostly in the years shortly before and during World War I… …
53Prosthesis — For other uses, see Prosthesis (disambiguation). Not to be confused with Orthotic. A man with two prosthetic arms playing table football …
54Sleeve valve — The sleeve valve is a type of valve mechanism for piston engines, distinct from the more common poppet valve. They saw use in some pre World War II luxury cars, sports cars, the Willys Knight car and light truck, and saw substantial use in… …
55Spirit of St. Louis — This article is about the pioneer aircraft. For other uses, see The Spirit of St. Louis (disambiguation). Spirit of St. Louis Ryan NYP …
56Pratt & Whitney JT8D — The Pratt Whitney JT8D is a low bypass (0.96 to 1) turbofan jet engine, introduced by Pratt Whitney in February 1964 with the inaugural flight of Boeing s 727. It was a modification of the Pratt Whitney J52 turbojet engine, which powered the US… …
57Parkerizing — (also called phosphating and phosphatizing) is a method of protecting a steel surface from corrosion and increasing its resistance to wear through the application of an electrochemical phosphate conversion coating. Parkerizing is usually… …
58Connecting rod — piston (top) and connecting rod from typical automotive engine (scale is in centimetres) In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple… …
59Gnome Monosoupape — Monosoupape A 1917 Gnome 9N 160 hp Monosoupape rotary engine Type Rotary a …
60Cylinder (engine) — Illustration of an engine cylinder with a cross section view of the piston, connecting rod, valves and spark plug. A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders… …
