Setting valves - Revision history

Dnevil: Redirected page to Valve Timing

2014-07-24T21:58:18Z

Redirected page to Valve Timing

← Older revision		Revision as of 16:58, 24 July 2014
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	~~[[Category:Steam Locomotive Parts]]~~		#Redirect:[[Valve Timing]]
	~~[[Category:Definitions]]~~

	~~From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:~~

	: [[~~Setting valves\|~~Valve ~~setting~~]] is a term generally applied to the work of making the final accurate adjustments to the valves and the valve gear of a locomotive before it is placed in service. These adjustments are made in order that the positions of the valves shall at all times bear their proper relation to the positions of the pistons. Valve setting follows the erection or hanging of the valve gear by the machinist.


	~~== Dead Center ==~~

	~~See [[Dead center]]~~

	~~== Valve Formulas ==~~

	~~From Larry Koehl, <i>[[Live Steam Magazine]]</i>, June 1976~~


	~~: [[File:Valve Travel formula.gif]]~~


	~~: [[File:Valve Cut Off formula.gif]]~~


	~~The Throw of Eccentric formula, below, applies only to locomotives using Stephenson valve gear.~~


	~~: [[File:StephensonEccentricThrow formula.gif]]~~


	Larry suggests adding up to 0.002 inches to the Throw of Eccentric value for each pin in the valve gear (including the eccentric, too) because, even when new, there will be lost motion, possibly enough to eliminate the lead.

	~~Larry also points out the fact that Cut-Off is always 75% when Lap equals Port Width, for all values of Port Width.~~

	~~== External Links ==~~

	* [http://palivesteamers.org/pubs/gazette/2011_1-2.pdf "Steam Cutoff - Part 1 - Fun with Efficiency", <i>PLS Gazette</i>]
	* [http://palivesteamers.org/pubs/gazette/2011_3-4.pdf "Steam Cutoff - Part 2 - More Fun With Efficiency", <i>PLS Gazette</i>]
	* [http://www.jghtech.com/html/dead-center-1.html "Finding Locomotive Dead Centers", Jeffrey G. Hook]
	* [http://enginemanwook.wordpress.com/2010/04/10/steam-engine-steam-cutoff-explained/ "Steam Engine Steam Cutoff Explained"]
	* [http://books.google.com/books?id=TKV-AAAAMAAJ&dq=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&pg=PR12#v=onepage&q=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&f=false Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting]
	* [[Allen Models of Michigan]] catalog contains a write-up on how to set valves for an Stephenson Valve Gear.
	* [http://www.discoverlivesteam.com/magazine/179/index.htm "The Company Notch", <i>DiscoverLiveSteam.com</i>]

Dnevil: /* Dead Center */

2014-06-28T02:35:10Z

Dead Center

← Older revision		Revision as of 21:35, 27 June 2014
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	== Dead Center ==		== Dead Center ==

	~~From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:~~		See [[Dead center]]

	~~: A locomotive is said to be on a dead~~ center when the center of the main axle, the main crankpin, and the wristpin in the crosshead fall in one straight line. In a locomotive with two cylinders and the cranks set at right angles to each other, there are naturally four positions in which this condition is met. Then the dead centers, taken in order through one complete revolution of the main wheels, are the right front dead center, left front dead-center, right back dead center, and left back dead center.


	== Valve Formulas ==		== Valve Formulas ==

Dnevil at 05:03, 29 December 2013

2013-12-29T05:03:50Z

← Older revision		Revision as of 00:03, 29 December 2013
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	From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:		From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:

	: [[Valve setting]] is a term generally applied to the work of making the final accurate adjustments to the valves and the valve gear of a locomotive before it is placed in service. These adjustments are made in order that the positions of the valves shall at all times bear their proper relation to the positions of the pistons. Valve setting follows the erection or hanging of the valve gear by the machinist.		: [[Setting valves\|Valve setting]] is a term generally applied to the work of making the final accurate adjustments to the valves and the valve gear of a locomotive before it is placed in service. These adjustments are made in order that the positions of the valves shall at all times bear their proper relation to the positions of the pistons. Valve setting follows the erection or hanging of the valve gear by the machinist.

Dnevil at 05:03, 29 December 2013

2013-12-29T05:03:19Z

← Older revision		Revision as of 00:03, 29 December 2013
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	== Dead Center ==		== Dead Center ==

			From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:

	: A locomotive is said to be on a dead center when the center of the main axle, the main crankpin, and the wristpin in the crosshead fall in one straight line. In a locomotive with two cylinders and the cranks set at right angles to each other, there are naturally four positions in which this condition is met. Then the dead centers, taken in order through one complete revolution of the main wheels, are the right front dead center, left front dead-center, right back dead center, and left back dead center.		: A locomotive is said to be on a dead center when the center of the main axle, the main crankpin, and the wristpin in the crosshead fall in one straight line. In a locomotive with two cylinders and the cranks set at right angles to each other, there are naturally four positions in which this condition is met. Then the dead centers, taken in order through one complete revolution of the main wheels, are the right front dead center, left front dead-center, right back dead center, and left back dead center.

Dnevil at 05:02, 29 December 2013

2013-12-29T05:02:57Z

← Older revision		Revision as of 00:02, 29 December 2013
Line 1:		Line 1:
	[[Category:Steam Locomotive Parts]]		[[Category:Steam Locomotive Parts]]
			[[Category:Definitions]]

			From Frank Williams, <i>Locomotive Valve Setting</i>, 1944:

			: [[Valve setting]] is a term generally applied to the work of making the final accurate adjustments to the valves and the valve gear of a locomotive before it is placed in service. These adjustments are made in order that the positions of the valves shall at all times bear their proper relation to the positions of the pistons. Valve setting follows the erection or hanging of the valve gear by the machinist.


			== Dead Center ==

			: A locomotive is said to be on a dead center when the center of the main axle, the main crankpin, and the wristpin in the crosshead fall in one straight line. In a locomotive with two cylinders and the cranks set at right angles to each other, there are naturally four positions in which this condition is met. Then the dead centers, taken in order through one complete revolution of the main wheels, are the right front dead center, left front dead-center, right back dead center, and left back dead center.


	== Valve Formulas ==		== Valve Formulas ==

Dnevil: /* Valve Formulas */

2013-12-29T04:43:41Z

Valve Formulas

← Older revision		Revision as of 23:43, 28 December 2013
Line 19:		Line 19:

	Larry suggests adding up to 0.002 inches to the Throw of Eccentric value for each pin in the valve gear (including the eccentric, too) because, even when new, there will be lost motion, possibly enough to eliminate the lead.		Larry suggests adding up to 0.002 inches to the Throw of Eccentric value for each pin in the valve gear (including the eccentric, too) because, even when new, there will be lost motion, possibly enough to eliminate the lead.

			Larry also points out the fact that Cut-Off is always 75% when Lap equals Port Width, for all values of Port Width.

	== External Links ==		== External Links ==

Dnevil: /* Valve Formulas */

2013-12-29T04:40:57Z

Valve Formulas

@@ Line 3: / Line 3: @@
 == Valve Formulas ==
-From <i>[[Live Steam Magazine]]</i>, June 1976
+From Larry Koehl, <i>[[Live Steam Magazine]]</i>, June 1976
 == External Links ==

Dnevil at 03:54, 29 December 2013

2013-12-29T03:54:53Z

← Older revision		Revision as of 22:54, 28 December 2013
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	[[Category:Steam Locomotive Parts]]		[[Category:Steam Locomotive Parts]]

			== Valve Formulas ==

			From <i>[[Live Steam Magazine]]</i>, June 1976


	== External Links ==		== External Links ==

Dnevil: /* External Links */

2013-12-23T01:40:58Z

External Links

← Older revision		Revision as of 20:40, 22 December 2013
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	* [http://books.google.com/books?id=TKV-AAAAMAAJ&dq=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&pg=PR12#v=onepage&q=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&f=false Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting]		* [http://books.google.com/books?id=TKV-AAAAMAAJ&dq=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&pg=PR12#v=onepage&q=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&f=false Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting]
	* [[Allen Models of Michigan]] catalog contains a write-up on how to set valves for an Stephenson Valve Gear.		* [[Allen Models of Michigan]] catalog contains a write-up on how to set valves for an Stephenson Valve Gear.
			* [http://www.discoverlivesteam.com/magazine/179/index.htm "The Company Notch", <i>DiscoverLiveSteam.com</i>]

Dnevil: Created page with "Category:Steam Locomotive Parts == External Links == * [http://palivesteamers.org/pubs/gazette/2011_1-2.pdf "Steam Cutoff - Part 1 - Fun with Efficiency", PLS Gazette..."

2013-12-23T01:39:00Z

Created page with "Category:Steam Locomotive Parts == External Links == * [http://palivesteamers.org/pubs/gazette/2011_1-2.pdf "Steam Cutoff - Part 1 - Fun with Efficiency", PLS Gazette..."

New page
[[Category:Steam Locomotive Parts]]

== External Links ==

* [http://palivesteamers.org/pubs/gazette/2011_1-2.pdf "Steam Cutoff - Part 1 - Fun with Efficiency", PLS Gazette]
* [http://palivesteamers.org/pubs/gazette/2011_3-4.pdf "Steam Cutoff - Part 2 - More Fun With Efficiency", PLS Gazette]
* [http://www.jghtech.com/html/dead-center-1.html "Finding Locomotive Dead Centers", Jeffrey G. Hook]
* [http://enginemanwook.wordpress.com/2010/04/10/steam-engine-steam-cutoff-explained/ "Steam Engine Steam Cutoff Explained"]
* [http://books.google.com/books?id=TKV-AAAAMAAJ&dq=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&pg=PR12#v=onepage&q=Yoder%20Wharen%20%22Locomotive%20Valves%20and%20Valve%20Gears%22%20ragonnet&f=false Locomotive Valves and Valve Gears, with a Special Treatise on Valve Setting]
* [[Allen Models of Michigan]] catalog contains a write-up on how to set valves for an Stephenson Valve Gear.