gravity-operated
61Vomit Comet — is a nickname for any airplane that briefly provides a nearly weightless environment in which to train astronauts, conduct research, and film motion pictures.Versions of such airplanes have in the past been operated by NASA s [http://jsc aircraft …
62Colonization of the Moon — Lunar outpost redirects here. For NASA s plan to construct an outpost between 2012 and 2024, see Lunar outpost (NASA). Moonbase redirects here. For other uses, see Moonbase (disambiguation). 1986 artist concept The colonization of the Moon is the …
63Marshall Space Flight Center — George C. Marshall Space Flight Center Aerial view of the test area at MSFC …
64Ffestiniog Railway — Heritage Railway name = Ffestiniog Railway caption = Two trains passing at Tan y Bwlch, c. 1900 locale = Wales terminus = Porthmadog linename = Festiniog Railway Company builtby = Festiniog Railway Company originalgauge = RailGauge|23.5… …
65Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …
66Marine steam engine — Period cut away diagram of a triple expansion steam engine installation, circa 1918 A marine steam engine is a reciprocating steam engine that is used to power a ship or boat. Steam turbines and diesel engines largely replaced reciprocating steam …
671999 NATO bombing of Yugoslavia — Allied Force redirects here. For computer game, see Falcon 4.0: Allied Force. Operation Allied Force Part of the Kosovo War …
68Funicular — For the mathematical and architectural curve known as funicular, see catenary. Funicular in Valparaíso, Chile A funicular, also known as an inclined plane or cliff railway, is a cable railway in which a cable attached to a pair of tram like… …
69Washing machine — This article is about the laundry cleaning apparatus. For the Sonic Youth album, see Washing Machine (album). A typical modern front loading washing machine Irreler Bauerntradition shows an early Miele was …
70Ferris wheel — For other uses, see Ferris wheel (disambiguation). A Ferris wheel (also known as an observation wheel or big wheel) is a nonbuilding structure consisting of a rotating upright wheel with passenger cars (sometimes referred to as gondolas or… …
