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* <nowiki>[[Thermonuclear weapon#American developments|hydrogen bomb development program]]</nowiki> The anchor (#American developments) has been [[Special:Diff/685213439|deleted by other users]] before. <!-- {"title":"American developments","appear":{"revid":199722285,"parentid":198879891,"timestamp":"2008-03-21T00:44:46Z","removed_section_titles":["Original \"Super\"","Credit controversy","Testing"],"added_section_titles":["American developments"]},"disappear":{"revid":685213439,"parentid":685168920,"timestamp":"2015-10-11T15:26:03Z","removed_section_titles":["American developments","Soviet developments","British developments","Chinese developments","Indian developments","French developments"],"added_section_titles":["United States","Soviet Union","United Kingdom","China","France","India"]}} --> |
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==question about approximating isp at different chamber pressures== |
==question about approximating isp at different chamber pressures== |
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:Yes, the history sections needs coverage of alcohol as a fuel (V-2, [[PGM-11 Redstone]], and also coverage of [[Hydyne]] as used for [[Juno I]]. ([[User:Sdsds|sdsds]] - ''[[User talk:Sdsds|talk]]'') 21:04, 23 June 2009 (UTC) |
:Yes, the history sections needs coverage of alcohol as a fuel (V-2, [[PGM-11 Redstone]], and also coverage of [[Hydyne]] as used for [[Juno I]]. ([[User:Sdsds|sdsds]] - ''[[User talk:Sdsds|talk]]'') 21:04, 23 June 2009 (UTC) |
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:Goddard used LOX and gasoline. The V-2 and Redstone rockets burned 75% ethanol (the engines were not cooled very well, so fuel had to be diluted). Improved engines by RMI, Rocketdyne and in the Soviet Union burned 95% ethanol. It would be historically interesting to include Isp for those two concentrations of alcohol. [[User:DonPMitchell|DonPMitchell]] ([[User talk:DonPMitchell|talk]]) 16:18, 5 May 2014 (UTC) |
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== First Rockets? == |
== First Rockets? == |
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The number of liquid propellants in current/recent/historic use is not all that large, and the number of interesting properties is small (name; maybe melting point, boiling point, flash point, vapour pressure at 300K, density, toxicity, link to oxidant, link to more info) and could fit in a row of a Table. [[Special:Contributions/94.30.84.71|94.30.84.71]] ([[User talk:94.30.84.71|talk]]) 13:06, 5 September 2011 (UTC) |
The number of liquid propellants in current/recent/historic use is not all that large, and the number of interesting properties is small (name; maybe melting point, boiling point, flash point, vapour pressure at 300K, density, toxicity, link to oxidant, link to more info) and could fit in a row of a Table. [[Special:Contributions/94.30.84.71|94.30.84.71]] ([[User talk:94.30.84.71|talk]]) 13:06, 5 September 2011 (UTC) |
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:The article |
:The article ''does'' mention it plenty, just under its significantly more common name [[Unsymmetrical dimethylhydrazine|UDMH]]... [[User:ChiZeroOne|ChiZeroOne]] ([[User talk:ChiZeroOne|talk]]) 17:02, 5 September 2011 (UTC) |
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== Kerosene/H2O2 == |
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There is a strange omission in the propellant table of RP-1/H2O2. I say this is strange, because that combination was used an actual orbital launch vehicle (The UK Black Arrow rocket), whereas as far as I know all the other combinations with H2O2 haven't found practical applications yet. <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:GrampaScience|GrampaScience]] ([[User talk:GrampaScience|talk]] • [[Special:Contributions/GrampaScience|contribs]]) 17:50, 14 November 2013 (UTC)</span></small><!-- Template:Unsigned --> <!--Autosigned by SineBot--> |
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== Merge == |
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I recommend this page be merged with the page [[Liquid-propellant rocket]]. [[Special:Contributions/161.31.231.168|161.31.231.168]] ([[User talk:161.31.231.168|talk]]) 03:55, 2 October 2014 (UTC) |
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== want more == |
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* [[Cyclopropane]] |
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* [[Propane]] |
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* [[Propene]] (a.k.a. methylethylene or propylene) |
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* [[Propyne]] (a.k.a. methylacetylene) and [[propadiene]] (together called [[methylacetylene-propadiene gas]]) |
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* [[Dicyanoacetylene]] |
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* [[Syntin]] |
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* [[Cyanogen]] |
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* [[1.1.1-Propellane]] |
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* [[2.2.2-Propellane]] |
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* [[Cubane]] |
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* [[Cyclononane]] |
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* [[Norbornane]] |
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* [[Cyclobutane]] |
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(these have bond strain and other interesting features) <small class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/50.89.71.42|50.89.71.42]] ([[User talk:50.89.71.42|talk]]) 08:13, 17 January 2015 (UTC)</small><!-- Template:Unsigned IP --> <!--Autosigned by SineBot--> |
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== Hydrazine as oxidizer? == |
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I commented the last row in [[Liquid_rocket_propellant#Bipropellants]] as hydrazine doesn't seem to be a useful rocket fuel oxidizer. Please cite your source. [[User:Darsie42|Darsie42]] ([[User talk:Darsie42|talk]]) 07:44, 19 February 2017 (UTC) |
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== xdfghjk == |
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asdfghjklm [[Special:Contributions/154.115.246.120|154.115.246.120]] ([[User talk:154.115.246.120|talk]]) 16:55, 12 May 2021 (UTC) |
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I'm just wondering where this table came from, is there some equation or formula behind it, or did it just come from a bunch of test data? 24.137.113.90 18:55, 13 July 2007 (UTC)[reply]
Near the bottom of the page, for the H2O2/N2H4 combo, in a vacuum, it lists the exhast velocity as 3700 m/s. I'm not an expert, but this seems very unlikely, given that LOX/kerosene is 3500, and in general LOX and kerosene are supposed to be better performing than H2O2/N2H4. Could someone who knows what they're doing run those calculations again?
"Units have been converted to metric. "
All those units need to be specified, in all the tables. What's "pressure" in earlier table, for example. Gene Nygaard 17:08, 22 Dec 2004 (UTC)
Hmmm. "Pressure" is psia, which I'm sure you figured out from context. But this does bring up the point that psia is hardly metric. And 1000 psia is 6.894 MPa, which is hardly a nice round number. Iain McClatchie 19:38, 23 Dec 2004 (UTC)
Wolfkeeper,
You obviously know the subject, we're arguing over the meaning of words.
"believed" versus "noted".
"whilst being very energy dense and lightweight"
"where a hydrogen stage's low fuel mass"
"in practice"
I'm leaving your edits up for now so we can talk about this and resolve it. But I don't agree with all of them.
Iain McClatchie 22:23, 16 August 2005 (UTC)[reply]
It would be nice to see some of these reations written as chemical equations. --87.112.86.164 17:59, 19 August 2006 (UTC)[reply]
Some early liquid rockets were powered by ethanol. E.g. V-2. What propellants did Goddard use? Did he manage cryogenic oxygen? Sdsds 22:04, 1 April 2007 (UTC)[reply]
This is an excellent article. I like the conciseness and choice of references (e.g. Huzel and Huang as opposed to the overused Sutton). I am a bit perplexed by one of the opening comments:"This type of propellant has a long history going back to the first rockets..." Given that for 600 years all chemical rockets used solid propellants, that comment seems peculiar, or rather conspicuously false. Or am I missing something?Magneticlifeform (talk) 15:26, 2 November 2010 (UTC)[reply]
The article does not, and should, mention the Russian fuel Heptyl. It should say exactly what the molecular structure of this Heptyl is, and state its relevant physical properties. A Google search of this site has found nothing helpful. 94.30.84.71 (talk) 13:06, 5 September 2011 (UTC)[reply]
The number of liquid propellants in current/recent/historic use is not all that large, and the number of interesting properties is small (name; maybe melting point, boiling point, flash point, vapour pressure at 300K, density, toxicity, link to oxidant, link to more info) and could fit in a row of a Table. 94.30.84.71 (talk) 13:06, 5 September 2011 (UTC)[reply]
There is a strange omission in the propellant table of RP-1/H2O2. I say this is strange, because that combination was used an actual orbital launch vehicle (The UK Black Arrow rocket), whereas as far as I know all the other combinations with H2O2 haven't found practical applications yet. — Preceding unsigned comment added by GrampaScience (talk • contribs) 17:50, 14 November 2013 (UTC)[reply]
I recommend this page be merged with the page Liquid-propellant rocket. 161.31.231.168 (talk) 03:55, 2 October 2014 (UTC)[reply]
(these have bond strain and other interesting features) — Preceding unsigned comment added by 50.89.71.42 (talk) 08:13, 17 January 2015 (UTC)[reply]
I commented the last row in Liquid_rocket_propellant#Bipropellants as hydrazine doesn't seem to be a useful rocket fuel oxidizer. Please cite your source. Darsie42 (talk) 07:44, 19 February 2017 (UTC)[reply]
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asdfghjklm 154.115.246.120 (talk) 16:55, 12 May 2021 (UTC)[reply]