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In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
Falling mercury drops compress the air to atmospheric pressure which is released when the stream reaches a container at the bottom of the tube. As the pressure drops, the cushioning effect of trapped air between the droplets diminishes, so a hammering or knocking sound can be heard, accompanied by flashes of light within the evacuated vessel ...
This pressure wave can cause major problems, from noise and vibration to pipe rupture or collapse. It is possible to reduce the effects of the water hammer pulses with accumulators, expansion tanks, surge tanks, blowoff valves, and other features. The effects can be avoided by ensuring that no valves will close too quickly with significant flow ...
1949 Mercury M series 1966 Mercury M-100. From 1948 to 1968, the Mercury M-series followed the development of its Ford F-series counterparts, differing largely in exterior trim. For 1961 to 1966, Mercury trucks had a gear/lightning bolt symbol on their horn button and no other interior Mercury nameplates.
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For the 1967 model year, Mercury introduced the Mercury Marquis two-door hardtop as a divisional counterpart of the Ford LTD. Distinguishing it from other Mercury two-door hardtops, the Marquis included a standard vinyl roof and upright rear side windows that were similar to the Cougar. [3] For 1969, the division revised its full-size range.
Ford has gotten about 100 complaints from F-150 truck owners who say the speakers in their vehicles are emitting a loud, annoying noise that sounds like static, or glass shattering, and which ...
The F-150 again served as the basis for Ford full-size SUVs, as the long-running Ford Bronco was replaced by the five-door Ford Expedition for 1997, with Lincoln-Mercury introducing the Lincoln Navigator for 1998. For 2002, Lincoln-Mercury marketed its own version of the F-Series, introducing the Lincoln Blackwood as Lincoln's first pickup truck.