Talk:Herbert Akroyd Stuart

This article is rated C-class on Wikipedia's content assessment scale.
It is of interest to the following WikiProjects:

	Biography portal This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography articles
	This article has been automatically rated by a bot or other tool because one or more other projects use this class. Please ensure the assessment is correct before removing the `\|auto=` parameter.

Yorkshire Low‑importance

	Yorkshire portal Herbert Akroyd Stuart is within the scope of WikiProject Yorkshire, an attempt to build a comprehensive and detailed guide to Yorkshire on Wikipedia. If you would like to participate, you can visit the project page, where you can join the project, see a list of open tasks, and join in discussions on the project's talk page.YorkshireWikipedia:WikiProject YorkshireTemplate:WikiProject YorkshireYorkshire articles
Low	This article has been rated as Low-importance on the project's importance scale.

Lincolnshire Mid‑importance

	This article is within the scope of WikiProject Lincolnshire, a collaborative effort to improve the coverage of Lincolnshire 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.LincolnshireWikipedia:WikiProject LincolnshireTemplate:WikiProject LincolnshireLincolnshire articles
Mid	This article has been rated as Mid-importance on the project's importance scale.

Untitled[edit]

I thought Akroyd-Stewart invented the direct injection known as "airblast injection"? Swatoa 21:28, 7 July 2006 (UTC)[reply]

To me this page seems to be a try to put an opinion over. There are some parts that I find questionable, I would like some references so I would not have to hunt up the facts myself. If I do not find some references posted in a fesw weeks I will start hunting up references for the full subject of high compression engines (Diesel and other) and probably write an overwiew article with references. If I just start editing I am afraid that it will start a edit war, I have a feeling that some POVs are strong. Seniorsag 17:36, 15 February 2007 (UTC)[reply]

patent dispute[edit]

quote from hot bulb
""Akroyd-Stuart's heavy oil engine (compared to spark-ignition) is distinctly different from Rudolf Diesel's better-known engine where ignition is initiated through the heat of compression. An oil engine will have a compression ratio of about 3:1, where a typical Diesel engine will have a compression ratio ranging between 15:1 and 20:1. Furthermore fuel was injected during the intake stroke and not at the end of the compression stroke as in a diesel.^[1]"" Wdl1961 (talk) 00:20, 21 December 2008

It seems to me that the diesel or hot bulb principle was actually known hundreds if not thousands of years before in the East Indies. It was applied to the fire-piston, which was a bamboo cylinder containing tinder which was ignited by the heat produced by the compression of air when a sharp rap was given to the piston. It is perhaps still used by the tribes of Indonesia to make fire.

This article describes no patent dispute; so why the heading? Ttocserp 11:53, 30 May 2015 (UTC) — Preceding unsigned comment added by Prkprescott (talk • contribs)

References

^ US Patent 502837 Engine operated by the explosion of mixtures of gas or hydrocarbon vapor and air, dated August 8th 1893.line 45

Hyphen[edit]

Is there any well-sourced consensus on the hyphen between Akroyd and Stuart? Should it exist or not? Ran into this over on Diesel engine. Thanks. Kajabla (talk) 15:24, 23 June 2016 (UTC)[reply]

"spilt"?[edit]

"Spilt" is not the common spelling of "spilled" today, even in British English. — Preceding unsigned comment added by 23.119.204.117 (talk) 01:18, 19 December 2016 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just modified 2 external links on Herbert Akroyd Stuart. 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, you may follow the instructions on the template below to fix any issues with the URLs.

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: 18 January 2022).

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) 08:51, 1 April 2017 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just modified one external link on Herbert Akroyd Stuart. 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://archive.is/20120525002611/http://scotlandonsunday.scotsman.com/business.cfm?id=197272003 to http://scotlandonsunday.scotsman.com/business.cfm?id=197272003

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

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: 18 January 2022).

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) 18:42, 2 November 2017 (UTC)[reply]

External links modified[edit]

Hello fellow Wikipedians,

I have just modified 2 external links on Herbert Akroyd Stuart. 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, you may follow the instructions on the template below to fix any issues with the URLs.

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: 18 January 2022).

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) 07:54, 1 December 2017 (UTC)[reply]

"Hot bulb engines were produced until the late 1920s"[edit]

It is claimed that "Hot bulb engines were produced until the late 1920s". [[1]] says they where produced until the 1950s. I read somewhere else (source unknown) that Vierzon built tractors with this type of engine until the 1950s. May be 1920s should be changed. — Preceding unsigned comment added by Rudipedia (talk • contribs) 15:50, 14 February 2022 (UTC)[reply]

Lanz Bulldog tractors with hot-bulb (Akroyd) engines (50 and 60 PS) were made until 1957.^[1] The last Bulldog engines were direct-injected hot-bulb engines which have a higher ε-number than normal hot-bulb engines (id est a compression ratio comparable to a 2022 DI Turbo petrol (Otto) engine), but still, they have no compression igntion, and they retain their hot-bulb ignition. This makes them almost as efficient as antechamber-injected 1950s Diesels – however, their BMEP figures are still very low (<0.5 MPa) even when compared against the most archaic Diesels. Direct-injected hot-bulb (Akroyd) engines are also known as "half diesels" because of their increased compression ratio and their fuel (direct-injected Akroyds were designed with fuel injectors unsuited for fuels other than DIN-51601-compliant Diesel fuel, which is different from "bog standard Akroyds" that can use virtually any liquid petroleum product as fuel). Best regards, --Johannes (Talk) (Contribs) (Articles) 17:49, 14 February 2022 (UTC)[reply]

References

^ Don MacMillan: The Big Book of John Deere Tractors, Voyageur Press, St. Paul 1999, p. 110

[1] US Patent 502837 Engine operated by the explosion of mixtures of gas or hydrocarbon vapor and air, dated August 8th 1893.line 45

[2] Don MacMillan: The Big Book of John Deere Tractors, Voyageur Press, St. Paul 1999, p. 110

[1]

[1]