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Surely that should be Aniline-Nitric acid, not Hydrazine-aniline? PML.
"... the trend in ICBMs has been to move toward solid fuel boosters."
Oh man, this sounds almost sarcastic to me. There are trends in ICBMs, really? What's hot this year, haha.
Not funny. -- .~.
Article talks about "hyperbolic" engine. That's probably incorrect, but someone who actually knows should make the edit.
The fourth paragraph opens with the sentence: "They are less likely to explode when starting." But the previous sentence refers to both Solid Fuels and Hypergolic Fuels - so which is less likely to explode? I assume Solid Fueled rockets because the article implies they're more stable, but I'm not a rocket scientist.
Perhaps the disambiguation page was created after this, but I'm so tired of articles linking to disambiguation pages, when it clearly should be linked to an article. Anyway, I linked MMH properly, and not to a disambiguation page.
Why isn't this a "true" hypergolic? In an article on rocketry, the crucial factor making hypergolic propellants of interest is their simple and reliable ignition, without the need for separate igniters and the risk of hard starts. Although the British HTP / kerosene engines did use a prior catalytic decomposition, they had all the engineering benefits of being hypergolic engines (just look at their reliablilty record, compared to their contemporaries). In a purely chemical context, the question of whether cold HTP + kerosene is hypergolic is indeed arguable, their place in rocketry seems secure. Andy Dingley ( talk) 13:13, 28 April 2008 (UTC)
Does anyone know anything about the etymology of the term "hypergolic".? 95.89.154.146 ( talk) 02:05, 8 May 2009 (UTC)
Strictly speaking it's the propellant combination that's hypergolic, not the propellants themselves. I've restored a sentence that stated that the term "hypergolic propellant" is commonly used, even though that's not strictly correct. John added a cn tag to this, but the title of the article itself presumes that it is in common use. If we don't want to state that, then we should perhaps rename the article to just "Hypergolic". Martijn Meijering ( talk) 16:48, 23 October 2010 (UTC)
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This is very poorly explained currently by the relevant articles. The current text makes it sound like the two are unrelated (or even mutually exclusive) phenomena, when (at least in my understanding), pyrophoricity is a special case of hypergolicity (a pyrophoric substance is hypergolic with room-temperature air).
Is my understanding about the relationship between the two phenomena correct? Or is there some technical reason to treat "pyrophoric" as distinct from "hypergolic with air"? This needs to be elaborated in the relevant articles. -- NetRolller 3D 13:08, 1 March 2018 (UTC)
References
I'm no expert, but it feels like the confusion might have come from the use of two pyrophoric substances together. The mixture is not hypergolic, only more pyrophoric if I understand it correctly. I edited the related technology paragraph to make this a little clearer. Amphioxi ( talk) 23:21, 14 October 2020 (UTC)
Just for interest the RZ2 MK3 engines used on Blue Streak used a hypergolic starter. This was put in place By the RR representative just before the floor beneath the engine chambers was removed. The starter wires lashing about as the main engines ran up at -4secs was a problem, bearing in mind the nickel tubes of which the engine chambers were formed, were not overly strong. Drg40 ( talk) 19:11, 8 July 2019 (UTC)
Hello all, I have gone and changed some names around and added further historical context based mostly around Clark's book
I have also deleted the first citation needed section in the "history" section as I could not find any evidence of this and Clark lists Walter specifically as the first to stumble upon hypergolicity
I am fairly new to Wikipedia, so review and help would be appreciated, please let me know if I messed anything up.
Thanks all! Mameyn ( talk) 19:48, 14 September 2021 (UTC)
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||
|
Surely that should be Aniline-Nitric acid, not Hydrazine-aniline? PML.
"... the trend in ICBMs has been to move toward solid fuel boosters."
Oh man, this sounds almost sarcastic to me. There are trends in ICBMs, really? What's hot this year, haha.
Not funny. -- .~.
Article talks about "hyperbolic" engine. That's probably incorrect, but someone who actually knows should make the edit.
The fourth paragraph opens with the sentence: "They are less likely to explode when starting." But the previous sentence refers to both Solid Fuels and Hypergolic Fuels - so which is less likely to explode? I assume Solid Fueled rockets because the article implies they're more stable, but I'm not a rocket scientist.
Perhaps the disambiguation page was created after this, but I'm so tired of articles linking to disambiguation pages, when it clearly should be linked to an article. Anyway, I linked MMH properly, and not to a disambiguation page.
Why isn't this a "true" hypergolic? In an article on rocketry, the crucial factor making hypergolic propellants of interest is their simple and reliable ignition, without the need for separate igniters and the risk of hard starts. Although the British HTP / kerosene engines did use a prior catalytic decomposition, they had all the engineering benefits of being hypergolic engines (just look at their reliablilty record, compared to their contemporaries). In a purely chemical context, the question of whether cold HTP + kerosene is hypergolic is indeed arguable, their place in rocketry seems secure. Andy Dingley ( talk) 13:13, 28 April 2008 (UTC)
Does anyone know anything about the etymology of the term "hypergolic".? 95.89.154.146 ( talk) 02:05, 8 May 2009 (UTC)
Strictly speaking it's the propellant combination that's hypergolic, not the propellants themselves. I've restored a sentence that stated that the term "hypergolic propellant" is commonly used, even though that's not strictly correct. John added a cn tag to this, but the title of the article itself presumes that it is in common use. If we don't want to state that, then we should perhaps rename the article to just "Hypergolic". Martijn Meijering ( talk) 16:48, 23 October 2010 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Hypergolic propellant. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{
Sourcecheck}}
).
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 12:05, 21 July 2016 (UTC)
This is very poorly explained currently by the relevant articles. The current text makes it sound like the two are unrelated (or even mutually exclusive) phenomena, when (at least in my understanding), pyrophoricity is a special case of hypergolicity (a pyrophoric substance is hypergolic with room-temperature air).
Is my understanding about the relationship between the two phenomena correct? Or is there some technical reason to treat "pyrophoric" as distinct from "hypergolic with air"? This needs to be elaborated in the relevant articles. -- NetRolller 3D 13:08, 1 March 2018 (UTC)
References
I'm no expert, but it feels like the confusion might have come from the use of two pyrophoric substances together. The mixture is not hypergolic, only more pyrophoric if I understand it correctly. I edited the related technology paragraph to make this a little clearer. Amphioxi ( talk) 23:21, 14 October 2020 (UTC)
Just for interest the RZ2 MK3 engines used on Blue Streak used a hypergolic starter. This was put in place By the RR representative just before the floor beneath the engine chambers was removed. The starter wires lashing about as the main engines ran up at -4secs was a problem, bearing in mind the nickel tubes of which the engine chambers were formed, were not overly strong. Drg40 ( talk) 19:11, 8 July 2019 (UTC)
Hello all, I have gone and changed some names around and added further historical context based mostly around Clark's book
I have also deleted the first citation needed section in the "history" section as I could not find any evidence of this and Clark lists Walter specifically as the first to stumble upon hypergolicity
I am fairly new to Wikipedia, so review and help would be appreciated, please let me know if I messed anything up.
Thanks all! Mameyn ( talk) 19:48, 14 September 2021 (UTC)