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[Lizzie_Zoom]

For anyone working on their combustion engine pistons, the following is an example of a brand new one for a 9F 2-10-0 steam railway engine:



each one of the two cylinders fitted to the 9F's (except the Crosti boiler examples, which are another story!) had a diameter of 20 inches and a stroke of 28 inches, which with all the other specifications of this class gave a tractive effort at 85% of boiler pressure (250lb psi) of 39,667lb's.

This is the 9F, 92212, that is being overhauled on the Mid-Hants (The Watercress Line) Railway at Ropley which will soon have the piston fitted:



These freight engines formed a very successful class right at the end of steam on BR, with 9F 92220 Evening Star being the last steam engine built by British Railways in 1960 at the Swindon ex-GWR locomotive works. Now preserved it is one of nine, including 92212, when I last checked.

[bob.dent]

How Big Is Your Piston?

Ooh er Lizzie.......that's a bit personal!!

[Lizzie_Zoom]

How Big Is Your Piston?

Ooh er Lizzie.......that's a bit personal!!

Trust you Bob!

[crazyjoetavola]

A practical application for such a big one?


[media]http://www.youtube.com/watch?v=b8_jmtbvzmY&feature=related[/media]

[Lizzie_Zoom]

A practical application for such a big one?


[media]http://www.youtube.com/watch?v=b8_jmtbvzmY&feature=related[/media]

Extracted of course from the famous 1936 Night Mail documentary film by the GPO Film Unit, that I have a copy of, but here it is in abbreviated form on Youtube:

[media]http://www.youtube.com/watch?v=Gmq6mFAEqNQ[/media]

Such a valuable historical and entertaining film, which is a must for most steam railway historians and enthusiasts alike 8-) 8-) 8-) 8-)

[crazyjoetavola]

A practical application for such a big one?


[media]http://www.youtube.com/watch?v=b8_jmtbvzmY&feature=related[/media]

Extracted of course from the famous 1936 Night Mail documentary film by the GPO Film Unit, that I have a copy of, but here it is in abbreviated form on Youtube:

[media]http://www.youtube.com/watch?v=Gmq6mFAEqNQ[/media]

Such a valuable historical and entertaining film, which is a must for most steam railway historians and enthusiasts alike 8-) 8-) 8-) 8-)

....a very much underrated group

[Marks DTM Calib]

A small 280mm diameter on a 12LDA28C in a 47....but there are 12 of them

[Lizzie_Zoom]

A small 280mm diameter on a 12LDA28C in a 47....but there are 12 of them

Which gives Mark a maximum tactive effort of 62,000lbs

Well out rating the tractive effort at 39,667lb at 85% boiler pressure, of the 9F

[Lizzie_Zoom]

Just to add though that the preserved 9F 92203 Black Prince  pulled a train of  2198 tonnes at Foster Yeoman's Tor Works in September 1982, the heaviest freight to be hauled by any locomotive in the UK. 8-) 8-) 8-) 8-)

[Gaffers]

And here's me thinking that LZ had had enough of those young boys in her class and wanted some real men 

[Marks DTM Calib]

A small 280mm diameter on a 12LDA28C in a 47....but there are 12 of them

Which gives Mark a maximum tactive effort of 62,000lbs

Well out rating the tractive effort at 39,667lb at 85% boiler pressure, of the 9F

And hence why the demise of steam came about...... much lower maintenance, better availability, better fuel economy were all the bonus points for diesel (and even more so electric)

The Uk has no choice but to move away from steam.

Did you know they built a class 47 with twin Maybach engines (as per a Western) and electrical drive (look for Brush Class 47 falcon)...sadly scrapped now, it also had a water scoop to use the water troughs on the mainline to replenish the steam heat boilers water supply.

[Lizzie_Zoom]

A small 280mm diameter on a 12LDA28C in a 47....but there are 12 of them

Which gives Mark a maximum tactive effort of 62,000lbs

Well out rating the tractive effort at 39,667lb at 85% boiler pressure, of the 9F

And hence why the demise of steam came about...... much lower maintenance, better availability, better fuel economy were all the bonus points for diesel (and even more so electric)

The Uk has no choice but to move away from steam.

Did you know they built a class 47 with twin Maybach engines (as per a Western) and electrical drive (look for Brush Class 47 falcon)...sadly scrapped now, it also had a water scoop to use the water troughs on the mainline to replenish the steam heat boilers water supply.

Another, crucial reason for the demise of steam, was the working conditions on the footplate and in the sheds.  Post war there was a severe shortage of men prepared anymore to labour in dirty, grimy, dangerous conditions in all weathers.  A large number of steam engine men enjoyed their job, but the vast majority wanted something a great deal better.  The romance of the railways had long disappeared, like it has now about being an airline pilot, and the wonderful history of the railways met a change for, as you say Mark, other critical reasons. Those of economics also dictated that the inefficiency of technically a 150 year old basic design had a far superior twentieth century replacement.  Just a great pity the British Railways board were so incompetent at introducing the right diesels and electrics!!

Thanks, but no Mark, I did not know about that particular 47,so thanks for the info!  

[Lizzie_Zoom]

You no doubt know this already Mark, but for the benefit of anyone also interested I have found the below link that gives a great account of Class 47 Falcon:

http://www.class47.co.uk/c47_feature_424.php

  8-) 8-)

[Martin_1962]

A small 280mm diameter on a 12LDA28C in a 47....but there are 12 of them

Which gives Mark a maximum tactive effort of 62,000lbs

Well out rating the tractive effort at 39,667lb at 85% boiler pressure, of the 9F

And hence why the demise of steam came about...... much lower maintenance, better availability, better fuel economy were all the bonus points for diesel (and even more so electric)

The Uk has no choice but to move away from steam.

Did you know they built a class 47 with twin Maybach engines (as per a Western) and electrical drive (look for Brush Class 47 falcon)...sadly scrapped now, it also had a water scoop to use the water troughs on the mainline to replenish the steam heat boilers water supply.

It was a prototype - nearer in design to a 31 - look at the bogies.

It was TOPS class 53 and was numbered 1200 when purchased from Brush by BR.

2800bhp and was better than a Western (srry Western fans)

[Martin_1962]

You no doubt know this already Mark, but for the benefit of anyone also interested I have found the below link that gives a great account of Class 47 Falcon:

http://www.class47.co.uk/c47_feature_424.php

  8-) 8-)

53 not 47 - but it was good

Search for Heljan and Falcon - I want one!