Talk:Cryogenic rocket engine

	Rocketry portal This article is within the scope of WikiProject Rocketry, a collaborative effort to improve the coverage of rocketry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.RocketryWikipedia:WikiProject RocketryTemplate:WikiProject RocketryRocketry articles
???	This article has not yet received a rating on the project's importance scale.

Spaceflight

	Spaceflight portal This article is within the scope of WikiProject Spaceflight, a collaborative effort to improve the coverage of spaceflight on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.SpaceflightWikipedia:WikiProject SpaceflightTemplate:WikiProject Spaceflightspaceflight articles
???	This article has not yet received a rating on the project's importance scale.

Merge with Liquid-propellant rocket

Cryogenic engine redirects to Liquid-propellant rocket. It seems like there is redundancy here. Joja lozzo 02:43, 16 April 2010 (UTC)[reply]

I've fixed this redirect. Yes, there is a little redundancy in the contents of Liquid-propellant rocket and Cryogenic rocket engine, but not enough to merge (my opinion). --Kubanczyk (talk) 22:36, 17 April 2010 (UTC)[reply]

india has developed its own cryogenic engine. needs to be verified. —Preceding unsigned comment added by 117.195.200.189 (talk) 20:38, 1 January 2011 (UTC)[reply]

Not only has India developed its indigenous cryogenic engine it is one of the most efficient engines of its class in the world as far as specific impulse is concerned.

Article scope is unclear

Question about article scope. The article is about cryogenic rocket engines, at least as far as its title is concerned, but never defines its terms.

Are we talking only about LH2/LOX engines? (as this seems to be the major focus of the article)
What about cryogenic oxidizer but non-cryogenic fuel (like RP-1/LOX rocket engines? Seems that they are cryogenic too, but not represented in the article.
What about non-governmental cryogenic engines, like the SpaceX Raptor Liquid methane/LOX engine now in development? ... or the SpaceX Merlin rocket engines currently flying, and currently in their third generation of engine model? I realize that 95%+ of all rocket engine development efforts to date are governmental programs and government funded, but not all of them are. What should this article be about?

In my view, it is necessary to define our terms, and then editors can help improve the article by editing it over time to better cover that topic scoope. Cheers. N2e (talk) 21:03, 7 January 2014 (UTC)[reply]

I don't know what government has to do with any of this, since all engines are built by private companies, not governments. But, generally, cryogenic refers to LH2-LOX while semi-cryogenic refers to LOX-RP1, LOX-ethanol or LOX-liquid methane, but no article has yet been created for semi-cryogenic engines. AnythingCouldHappen (talk) 06:58, 11 July 2014 (UTC)[reply]

External links modified

Hello fellow Wikipedians,

I have just modified one external link on Cryogenic rocket engine. 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:

Added archive https://web.archive.org/web/20120204144940/http://www.astronautix.com/engines/rl10b2.htm to http://www.astronautix.com/engines/rl10b2.htm

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).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 01:42, 3 December 2016 (UTC)[reply]

Why are only Hydrolox Engines Mentioned?

The scope of the article is any "cryogenic" engine: both fuel and oxidizer requiring cooling. Methalox engines fit this description, but none are mentioned.

Why? Redacted II (talk) 12:56, 15 June 2024 (UTC)[reply]