Talk:Monopropellant rocket

Old undated comments

Reading the page I had the doubt whether these monopropellants burn themselves without being ignited (by a fire, spark, laser, etc). This should be stated clearly

For instance in the paragraphs below there could be a reference to the igniter.

Most monopropellant rocket systems consist of a fuel tank, usually a titanium or aluminum sphere, with a nitryl rubber bladder filled with the fuel. The sphere is then pressurized with helium, which pushes it out to the motors. A pipe leads from the bladder to a poppet valve, and then to the reaction chamber of the rocket motor. Usually, there's not just one motor, but two to twelve, each with its own little valve.

The rocket is fired when the computer sends direct current through a small electromagnet that opens the poppet valve. The firing is often very brief, a few thousandths of a second, and usually sounds like a pebble thrown against a metal trash can. If the motor stays on for long, it makes a piercing hiss. —Preceding unsigned comment added by 57.66.41.132 (talk • contribs)

There is no igniter with hydrazine. Shell 405 is a spontaneous catalyst, that is, hydrazine decomposes (combusts) on contact with the catalyst. The reaction is highly exothermic and produces a 1800 deg. F gas that is a mixture of nitrogen, hydrogen and ammonia.``` —Preceding unsigned comment added by Cevaughan (talk • contribs)

Citations?

This article needs some citations. Titanium Dragon (talk) 02:27, 8 February 2008 (UTC)

Yes, this is still quite true as of 25 Jan 2011. I have added a substantive section on solar-thermal monopropellant rockets today, all well-sourced. But all of the chemical-reaction monoprop claims in the article still have no sources at all. N2e (talk) 01:23, 26 January 2011 (UTC)

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Wiki Education assignment: History of Science

This article was the subject of a Wiki Education Foundation-supported course assignment, between 15 January 2024 and 10 May 2024. Further details are available on the course page. Student editor(s): Tylerd24, PDLemoo (article contribs). Peer reviewers: Atghmb, Mnbkv6.

— Assignment last updated by K8shep (talk) 16:15, 22 March 2024 (UTC)

Today I am adding a history section that goes over the early investigation of monopropellant rockets in the United States and the Soviet Union with the applicable relevant links to popular missions like the Mariner, Ranger, and Thor-Able. Pulling from https://en.wikipedia.org/wiki/User:Tylerd24/Monopropellant_rocket Tylerd24 (talk) 14:13, 12 April 2024 (UTC)

I would also like to edit the initial section that describes the basic chemistry behind chemical rocket function. Most of the utilize chemical decomposition per NASA TR 32-1227 (https://ntrs.nasa.gov/enwiki/api/citations/19680006875/downloads/19680006875.pdf) (https://en.wikipedia.org/wiki/Chemical_decomposition), so the first couple sentences are a little inaccurate or misleading. My plan is give a light overview of the prevailing thrusters used in many current systems.Tylerd24 (talk) 20:43, 19 April 2024 (UTC)

I want to add to the history section with information about the German developments on early monopropellant rockets as well as the British. PDLemoo (talk) 14:29, 1 May 2024 (UTC)