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The new graphic is great but it couldnt be hello good samaratin in two ways. 1) it lacks a flameholder, usually just drawn as a zigzag line. 2) Most importantly, the design shown is supersonic, therefore it needs a converging-diverging exhaust nozzle to induce supersonic exhaust.
Finally, a subsonic rendition would be nice, with simple diverging intake diffuser and converging exhaust
The picture of the "low speed Ramjet" is worthless. That is NOT a ramjet. It's more of a space heater than anything else. A ramjet produces thrust, while theirs does not. It does not operate like a ramjet in any sense of the word. I removed the picture of it since it is misleading and doesn't contribute anything to an article about ramjets. Maybe it will be useful in an article about space heaters.
Put this link to the article? http://www.youtube.com/watch?v=duHJjcMAoWM&feature=related 84.56.62.55 ( talk) 10:46, 22 February 2008 (UTC)
I am wondering how the forward thrust results in detail. Naively looking one could assume that the combustion generates thrust symmetrically forward through the outlet and backward through the inlet which compensate themselves to zero. Can someone explain where the mistake is in this idea? I assume hat has something to do with requirement for preexisting forward speed and the asymmetries in geometry of the chamber, but how does it work in detail? I think somewould who knows should add an explanation of the priciple of operation to the article. 141.58.5.24 ( talk) 10:00, 16 August 2010 (UTC)
Article needs more information about Stechkin, who worked out the theory of the ramjet with compressible fluid flow and supersonic flow. That work was widely acclaimed at the time, and prompted Crocco's famous paper on "Superaviation". DonPMitchell ( talk) 06:37, 18 April 2013 (UTC)
The J58 at M3.2 is classified in authoritative sources as an afterburning turbojet ( http://www.enginehistory.org/Convention/2013/SR-71PropulsionSystem-2013.pdf) or a turbojet with bleed air recovery (US Patent 3,344,606) or a turbojet with afterburner and compressor bleed bypass at high Mach (Flight Manual)
I have deleted the J58 from this ramjet article as I believe the statement "act as turbojet-assisted ramjets at high speeds (Mach 3.2)" is misleading and unhelpful without some explanation of how and why which of necessity would be a somewhat personal viewpoint, perhaps only for the serious thinker.User:Pieter1963|Pieter1963]] ( talk) 21:33, 2 March 2014 (UTC)
I rate this as a below average article for Wikipedia. look at the table of contents - then overall the article. Mixed in are some short paragraphs/ phrases tha read like they might be section headers- but are not marked as such in per table of contents. Also look at the structure of the table of contents, use of subsections. Content on its own for the article seems pretty good but headings/ structure gives article a poor feel. Wfoj3 ( talk) 20:46, 13 May 2017 (UTC)
History section is mainly split by nation. It might be more helpful to organise it chronologically ? Any reason not to ? - Rod57 ( talk) 18:20, 22 October 2019 (UTC)
Nowhere is it stated where the name comes from. Neutron Jack ( talk) 02:08, 11 July 2017 (UTC)
CAN-TYPE COMBUSTOR DESIGN FOR A LOW COST SUBSONIC RAMJET ENGINE may be a useful source re subsonic ramjets. - Rod57 ( talk) 19:02, 2 September 2019 (UTC)
The two sections : Aircraft using ramjets, and Missiles using ramjets could be easier to use if they were tables. But what columns to add ? Maybe dates, engines, ranges, max speed, and a comment (eg for launch method) ? - Rod57 ( talk) 18:17, 22 October 2019 (UTC)
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion:
Participate in the deletion discussion at the nomination page. — Community Tech bot ( talk) 15:52, 26 February 2022 (UTC)
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
The new graphic is great but it couldnt be hello good samaratin in two ways. 1) it lacks a flameholder, usually just drawn as a zigzag line. 2) Most importantly, the design shown is supersonic, therefore it needs a converging-diverging exhaust nozzle to induce supersonic exhaust.
Finally, a subsonic rendition would be nice, with simple diverging intake diffuser and converging exhaust
The picture of the "low speed Ramjet" is worthless. That is NOT a ramjet. It's more of a space heater than anything else. A ramjet produces thrust, while theirs does not. It does not operate like a ramjet in any sense of the word. I removed the picture of it since it is misleading and doesn't contribute anything to an article about ramjets. Maybe it will be useful in an article about space heaters.
Put this link to the article? http://www.youtube.com/watch?v=duHJjcMAoWM&feature=related 84.56.62.55 ( talk) 10:46, 22 February 2008 (UTC)
I am wondering how the forward thrust results in detail. Naively looking one could assume that the combustion generates thrust symmetrically forward through the outlet and backward through the inlet which compensate themselves to zero. Can someone explain where the mistake is in this idea? I assume hat has something to do with requirement for preexisting forward speed and the asymmetries in geometry of the chamber, but how does it work in detail? I think somewould who knows should add an explanation of the priciple of operation to the article. 141.58.5.24 ( talk) 10:00, 16 August 2010 (UTC)
Article needs more information about Stechkin, who worked out the theory of the ramjet with compressible fluid flow and supersonic flow. That work was widely acclaimed at the time, and prompted Crocco's famous paper on "Superaviation". DonPMitchell ( talk) 06:37, 18 April 2013 (UTC)
The J58 at M3.2 is classified in authoritative sources as an afterburning turbojet ( http://www.enginehistory.org/Convention/2013/SR-71PropulsionSystem-2013.pdf) or a turbojet with bleed air recovery (US Patent 3,344,606) or a turbojet with afterburner and compressor bleed bypass at high Mach (Flight Manual)
I have deleted the J58 from this ramjet article as I believe the statement "act as turbojet-assisted ramjets at high speeds (Mach 3.2)" is misleading and unhelpful without some explanation of how and why which of necessity would be a somewhat personal viewpoint, perhaps only for the serious thinker.User:Pieter1963|Pieter1963]] ( talk) 21:33, 2 March 2014 (UTC)
I rate this as a below average article for Wikipedia. look at the table of contents - then overall the article. Mixed in are some short paragraphs/ phrases tha read like they might be section headers- but are not marked as such in per table of contents. Also look at the structure of the table of contents, use of subsections. Content on its own for the article seems pretty good but headings/ structure gives article a poor feel. Wfoj3 ( talk) 20:46, 13 May 2017 (UTC)
History section is mainly split by nation. It might be more helpful to organise it chronologically ? Any reason not to ? - Rod57 ( talk) 18:20, 22 October 2019 (UTC)
Nowhere is it stated where the name comes from. Neutron Jack ( talk) 02:08, 11 July 2017 (UTC)
CAN-TYPE COMBUSTOR DESIGN FOR A LOW COST SUBSONIC RAMJET ENGINE may be a useful source re subsonic ramjets. - Rod57 ( talk) 19:02, 2 September 2019 (UTC)
The two sections : Aircraft using ramjets, and Missiles using ramjets could be easier to use if they were tables. But what columns to add ? Maybe dates, engines, ranges, max speed, and a comment (eg for launch method) ? - Rod57 ( talk) 18:17, 22 October 2019 (UTC)
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion:
Participate in the deletion discussion at the nomination page. — Community Tech bot ( talk) 15:52, 26 February 2022 (UTC)