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{{Merge to|Search engine|discuss=Talk:Search engine#Proposed merge of Search engine (computing) into Search engine|date=September 2023}} ...o help find information stored on one or more [[computer system]]s. Search engines discover, crawl, transform, and store information for retrieval and present ...

...proposed as a practical alternative to fossil fuel for internal combustion engines.<ref>{{cite web|url=http://live.psu.edu/story/27233|title=Penn State Live|a ...

...|volume=4|issue=4|access-date=June 16, 2019}}</ref> Aerospike engines were proposed for many [[single-stage-to-orbit]] (SSTO) designs. They were a contender fo ...This design has the advantage of being stackable, allowing several smaller engines to be placed in a row to make one larger engine while augmenting steering p ...

|designer = [[Reaction Engines Limited]] ...//www.reactionengines.co.uk/downloads/REL_Engine_Names.pdf |title=Reaction Engines Limited Engine Names ...

...ie bins stored at Warren Farm caught fire leading to a response of 10 fire engines as well as "70 firefighters and officers."<ref>{{Cite web |title=Ealing's L ...n Farm was their desired site for a new first team training facility. They proposed to build a two-storey training centre and a three-storey operations buildin ...

...howstuffworks">{{Cite web |url=https://science.howstuffworks.com/transport/engines-equipment/question127.htm |title=How does a catapult work? |date=2000-04-01 ...ody]]'s [[Planetary surface|surface]] into space. Many variants have been proposed, but the concept most often refers to an elevator that reaches from the sur ...

{{Short description|Measure of the fuel efficiency of internal combustion engines}} ...It is typically used for comparing the efficiency of [[internal combustion engines]] with a shaft output. ...

...r generating electricity on a large scale. In contrast, the proposed steam engines may be for stationary, road, rail or marine use. ...kte/schiff_us.pdf |archive-date=2007-10-15 |title=Modern type marine steam engines with remote control; same number of personnel on steam and motor ships!| pu ...

...orbiters, landers and rovers to balloons and planetary boats. A spacecraft proposed to use this generator was the [[TiME (spacecraft)|TiME]] boat-lander missio ...ccess-date=28 October 2022 }}</ref> The [[Jupiter Europa Orbiter]] mission proposed using four ASRG to power an orbiter in the Jovian system. Another possibili ...

...set of power ratings is used. For example, [[Helicopter#Engines|helicopter engines]] are rated for continuous power (which does not have a time constraint), t ...cal apparatus and transmission lines are a function of the duration of the proposed load and the ambient temperature; a transmission line or transformer, for e ...

...recent times by [[K. Eric Drexler]] in his book on [[nanotechnology]], ''[[Engines of Creation]]'' (coining the term '''clanking replicator ''' for such machi ...elated [[Von Neumann architecture|computer architecture]] that von Neumann proposed and so its use is discouraged where accuracy is important.<ref name="Freita ...

...le left the atmosphere additional thrust would be necessary. Thus multiple engines would be needed at the base as well as at the rotor tips.{{cn|date=April 20 ...<ref>United States Patent 5842665</ref> A similar system with non-rotating engines was studied for the [[N1 rocket]]. That application had a much smaller base ...

# The output work power of heat engines is always smaller than the input heating power. The rest of the heat energy # The efficiency of real heat engines is even lower than the Carnot efficiency due to [[Reversible process (therm ...

{{Merge from|Hypermiling|discuss=Talk:Fuel efficiency#Proposed merge of Hypermiling into Fuel efficiency|date=November 2023}} | align ="right"|N/A to turbine engines ...

...her, a popularization of an early proposal by [[K. Eric Drexler]] in his [[Engines of Creation|1986 discussions of MNT]], but [http://www.e-drexler.com/d/06/0 ...0-09-05}}</ref> recently published by Freitas and Merkle provides numerous proposed methods by which replicators could, in principle, be safely controlled by g ...

.... There are also exotic and speculative methods to recover energy, such as proposed [[fusion reactor]] designs which aim to directly extract energy from intens ...s. The combustion of [[fossil fuel]]s supplies most of the energy to these engines, with a significant fraction from [[nuclear fission]] and some from [[renew ...

...e constructed. Drexler went on to publish two books on nanotechnology: ''[[Engines of Creation]]'' in 1986, which was intended for the public, and the technic ...scussion, a discrepancy of three orders of magnitude between what has been proposed in the literature and what is criticized suggests at best an inadequate gra ...

...t burning fossil fuels, such as [[coal]] and [[Oil shale|oil]], inside the engines would release [[pollutant]]s. This is an explicit example of an externality ...he Earth system to be able to re-engineer it safely". According to her the proposed technique of dimming the rays of the sun with sulphate-spraying helium ball ...

...ttp://worldcat.org/oclc/1167078377|title=Modern thermodynamics : from heat engines to dissipative structures|date=1998|publisher=John Wiley|isbn=0-471-97393-9 ...le the engine produces nonzero work. It is important to note that for heat engines and other thermal systems, the free energies do not offer convenient charac ...

...engine]]s such as [[Stirling engine]]s would not be possible. Unlike heat engines, the [[solid-state (electronics)|solid state]] electrical components typica ...and the temperature gradient existing in the aircraft skin have also been proposed.<ref name="auto"/> ...