Talk:Hybrid-propellant rocket

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Holy crap, someone decided to be super-wordy when writing this article. I'll get around to doing a rewrite on the intro eventually. Night Gyr 17:41, 7 April 2006 (UTC)[reply]

This page is extremely light on the real history of hybrid rockets. We have an abbreviated history that covers a lot more of the players and background on our website. I would like to pull this page together and make it more succinct and coherent. I will try to do this in the next several weeks... Jonny.dyer (talk) 00:07, 23 April 2009 (UTC)[reply]

Thanks for the article improvements. More references would be appreciated, esp. to journals, books, and published sources.—Tetracube (talk) 04:51, 23 April 2009 (UTC)[reply]

Ya, I'm working in collecting them... Jonny.dyer (talk) 05:16, 23 April 2009 (UTC)[reply]

Just wanted to note that I am still working on improving this page (in case anyone actually reads the discussion page for it). The next step is to add some more detailed technical discussion, including the rdot equation and the implications it has for O/F shift, grain geometries, etc. Jonny.dyer (talk) 06:10, 11 May 2009 (UTC)[reply]

The "Properties" section seems pretty bias in favor of this technology to me, and things like "In general, much less development work has been performed with hybrids than liquids or solids and it is likely that some of these disadvantages could be rectified through further investment in research and development" are pure opinion, particularly without any source listed. If this article is truly impartial, someone needs to hammer out why this this technology isn't being used all over the place. — Preceding unsigned comment added by 71.67.137.245 (talk) 02:35, 1 April 2013 (UTC)[reply]

"APCP"?????[edit]

The article refers to "Disdvantages compared with APCP solid rockets" but the article never defines what "APCP" means. What does APCP mean?Betathetapi545 (talk) 10:33, 1 November 2014 (UTC)[reply]

It stands for ammonium perchlorate composite propellant Kees08 (talk) 23:57, 24 April 2016 (UTC)[reply]

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File:3D Printed Hybrid Rocket Fuel Grain.jpg scheduled for POTD[edit]

Hello! This is to let editors know that the featured picture File:3D Printed Hybrid Rocket Fuel Grain.jpg, which is used in this article, has been selected as the English Wikipedia's picture of the day (POTD) for May 31, 2020. A preview of the POTD is displayed below and can be edited at Template:POTD/2020-05-31. Any improvements or maintenance to this article should be made before its scheduled appearance on the Main Page. If there are any concerns, please place a message at Wikipedia talk:Picture of the day. Thank you! Cwmhiraeth (talk) 09:33, 17 May 2020 (UTC)[reply]

Hybrid-propellant rocket

A hybrid-propellant rocket is a rocket with an engine that uses propellants in two different phases, one solid and the other gaseous or liquid. The concept can be traced back to at least the 1930s.

This picture shows a transparent 3D-printed hybrid-rocket fuel grain with dual helical fuel ports, a post-combustion chamber, and a de Laval nozzle, photographed prior to the hot-fire test. The motor used nitrous oxide as the oxidizer and Pyrodex pellets for the igniter.

Photograph credit: Matt Steiner and Kees08

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Handling solid propellants?[edit]

 "Hybrid rockets avoid some of the disadvantages of solid rockets like the dangers of propellant handling, while also avoiding some disadvantages of liquid rockets like their mechanical complexity."

I thought one of the main advantages of a solid rocket is that you just fill it when it is built, and there it stays, always ready for use (until the useful life of the chemical expires), whereas liquid rockets are dangerous and slow and need complex support systems, since the fuel and oxidizer needs to be stored separately and then pumped into the rocket before launch, which is a hazardous undertaking, especially since the fuels are often highly toxic and unstable. So what is this about solid fuel being more dangerous to handle? You don't HAVE to handle solid fuels, even if they were more toxic than liquid fuels. The only thing I can think is that it refers to the fuel in production, before and while it is put into the rocket. Maybe solid fuel is even more toxic and dangerous than liquid fuel (I guess it's the oxidizers which are the really dangerous part, not the fuel per se) during production, but I don't see why it should be more dangerous after it's built, due to the inherent nature of a solid fuel rocket. So this could be made more clear, since it's confusing to a layperson and potentially misleading as well.

64.223.162.221 (talk) 04:02, 23 November 2020 (UTC)[reply]

Isn't the part about UnB and whatnot pure propaganda?[edit]

On the session of student rockets, there is a long paragraph on UnB and other institutions. Besides the self-aggrandizing tone, therenis blatant self-promotion by having a hyperlink to their linkedin 2804:14C:6588:848B:24F6:9353:607C:DE99 (talk) 00:11, 22 April 2024 (UTC)[reply]

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