poppet pin
41Benz Patent Motorwagen — Infobox Automobile name=Benz Patent Motorwagen manufacturer=Rheinische Gasmotorenfabrik Benz Cie. production=1886 ndash;1893 successor=Benz VeloThe Karl Benz Patent Motorwagen (or motorcar), built in 1885, is widely regarded as the first… …
42Dead centre — For the lathe tool, see lathe center. In a reciprocating engine, the dead centre is the position of a piston in which it is farthest from, or nearest to, the crankshaft. The former is known as top dead centre (TDC) while the latter is known as… …
43Obturator ring — For other uses see Obturator Obturator rings are a specific type of piston ring used in World War I aero engines to compensate for warping of the cylinders. Purpose The rotary aircraft engines of World War I (engines with the crankshaft fixed to… …
44Counter-rotating propellers — Not to be confused with Contra rotating propellers. Counter rotating propellers Opposite propeller blade section can be clearly seen on this Piper PA 44 Seminole Counter rotating propellers, found on twin and multi engine propeller driven… …
45List of QI episodes (D series) — infobox tvseason season name = QI Series D caption = dvd release date = country = UK network = BBC first aired = 29 September 2006 last aired = 15 December 2006 num episodes = 13 prev series = Series C next series = Series E|This is a list of… …
46Louisiana Voodoo — New Orleans Voodoo redirects here. For US Arena Football League team, see New Orleans VooDoo. Not to be confused with Hoodoo (folk magic) or Haitian Vodou. Louisiana Voodoo, also known as New Orleans Voodoo, describes a set of underground… …
47List of Oz characters — For characters in the American TV series, see List of Oz (TV series) characters. This is a list of characters in the Oz books of L. Frank Baum, Ruth Plumly Thompson, John R. Neill, Jack Snow, Rachel Cosgrove Payes, Eloise Jarvis McGraw and Lauren …
48Dual ignition — A Hirth 2702 twin cylinder, two stroke aircraft engine. Equipped with dual ignition, the photo shows the two spark plugs per cylinder. Dual Ignition is a system for spark ignition engines, whereby each cylinder has every critical ignition… …
