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121Moon landing conspiracy theories — Astronauts Buzz Aldrin and Neil Armstrong in NASA s training mockup …
122Turbojet — Turbojets are the oldest kind of general purpose jet engines. Two engineers, Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently during the late 1930s, although credit for the first turbojet is… …
123Mobile Launcher Platform — An MLP being carried by a Crawler Transporter. The Mobile Launcher Platform or MLP is one of three two story structures used by NASA to support the Space Shuttle stack during its transportation from the Vehicle Assembly Building (VAB) to Launch… …
124Supermarine Spitfire (early Merlin powered variants) — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =Spitfire Vc launching from USS Wasp designer =R. J. Mitchell first flight =5 March 1936 introduction =1938 retired =1955, RAF status = primary user =Royal Air Force… …
125Wood fuel — is wood used as fuel. The burning of wood is currently the largest use of energy derived from a solid fuel biomass. Wood fuel can be used for cooking and heating, and occasionally for fueling steam engines and steam turbines that generate… …
126Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …
127U.S. Air Force Thunderbirds — Infobox Military Unit unit name= Thunderbirds 57th Wing United States Air Force caption=The Thunderbirds lined up at Nellis AFB, Las Vegas, Nevada dates= June 1, 1953 to the Present country= allegiance= branch= type= role= Aerobatic display team… …
128Indoor air quality — (IAQ) is a term referring to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. IAQ can be affected by microbial contaminants (mold, bacteria), gases (including… …
