propulsive energy
51Steam engine — A steam engine is a heat engine that performs mechanical work using steam as its working fluid. [ [http://www.britannica.com/EBchecked/topic/564472/steam engine steam engine Britannica Online Encyclopedia ] ] Steam engines have a long history,… …
52Project Orion (nuclear propulsion) — An artist s conception of the NASA reference design for the Project Orion spacecraft powered by nuclear propulsion. Project Orion was a study of a spacecraft intended to be directly propelled by a series of explosions of atomic bombs behind the… …
53Airbreathing jet engine — An airbreathing jet engine (or ducted jet engine) is a jet engine propelled by a jet of hot exhaust gases formed from air that is drawn into the engine via an inlet duct. All practical airbreathing jet engines are internal combustion engines that …
54Triathlon — This article is about a type of three sport athletic competition. For other uses, see Triathlon (disambiguation). The three typical components of triathlon: swimming, cycling, and running A triathlon is a multi sport event involving the… …
55Delta-v budget — (or velocity change budget) is an astrogation term used in astrodynamics and aerospace industry for total delta v (or total velocity change) requirements for the various propulsive tasks and orbital maneuvers over phases of a space mission.… …
56Deep sea — zones For the IMAX film, see Deep Sea 3D. The deep sea, or deep layer[1], is the lowest layer in the ocean, existing below the thermocline and above the seabed, at a depth of 1000 fathoms …
57Woodward effect — The Woodward Effect, also called the Mach Effect (particularly by Dr. Woodward himself), is an experimental method for propellantless propulsion. It was first proposed by Dr. James F. Woodward, a physicist at California State University at… …
58EmDrive — (also Relativity Drive) is the name of a spacecraft propulsion system proposed, and reportedly developed, by Roger Shawyer.cite news|title=Relativity drive: The end of wings and wheels?|date=2006 09 08|author=Justin Mullins|issue=2568|work=New… …
59Shaped charge — Sectioned high explosive anti tank round with the inner shaped charge visible …
60Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …
