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Post by vulcanbomber on Mar 20, 2014 22:00:04 GMT
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Post by Deleted on Mar 20, 2014 22:59:59 GMT
Hi DAVID and well done for some very revealing shots....The late BENNY HILL used to like 'em BIG !! and these BR Standard 2-cyls.locos are just that, aren't they ??.......That view directly into the firehole really shows just how W----------I----------D-----------E a full width, Wooton type box really is...You can also appreciate just why a LONG steam-cleaning lance was needed in the running sheds....Here is a comparison between a Belpaire boiler with deep, between the frames firebox and the Wooton type...........  -----------  |
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Post by Deleted on Mar 21, 2014 0:08:25 GMT
Fantastic pictures... you lucky guys.... what I wouldn't give to be able to get in a pit with 4472.... great work guys, I have no doubt that these pictures will add great detail to your build.... jealous or what?...  Pete |
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Post by ejparrott on Mar 21, 2014 7:32:05 GMT
Pete, get in touch with Ian Riley, you never know, he might just let you in with your camera.
If you don't ask.....
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Post by Jim on Mar 21, 2014 11:03:36 GMT
Thanks David for going to all that trouble of taking and posting a superb collection of photos of 'the bits' of a loco you never normally see.
I really appreciated the shots of the blower jets and the chance to compare them with the scaled down version Greenly recommends for 5"G.
Jim.
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Mar 21, 2014 18:54:47 GMT
Some interesting photos there.
just wondering how a two cylinder engine with a double blast pipe worked. Exhaust to single pipe then evenly split to the two blast caps? I guess the idea was to soften the draw on the fire?
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Post by Deleted on Mar 21, 2014 19:21:07 GMT
Hi ANDREW----------- that first view inside the smokebox shows the double nozzles being fed by the one source ..... Assuming that the TOTAL area of the two nozzles is the same as if only one was used, then the velocity of the exhaust gasses will be greater per each individual one and thus the vac. created will be greater also.....Same effect as putting a pricker over a single nozzle to sharpen the blast .....Remember that by the 1950's coal quality was less than pre-war years with higher amounts of volatiles so more air is required to get the required combustion conditions....Certainly by the mid '50's the WR Kings were being converted to double blast-pipe/chimneys for this very reason......... ( ps, I THINK that's right ??)........
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Post by vulcanbomber on Mar 21, 2014 20:13:24 GMT
Early 9F's were built with a single chimney, later ones were fitted with the double chimney and it was found to improve the locomotives efficiency, if my memory serves me right, currently under restoration at crewe, 92134 is the only single chimney 9F to survive the axe.
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Post by Deleted on Mar 21, 2014 20:42:05 GMT
Here's my take on double blast pipes. Think of the exhaust as a diverging cone between the blast pipe and the petticoat pipe. The periphery of this cone forms the boundary between the exhaust steam and the combustion gases. At this boundary, the gases become entrained with the steam due to molecular friction, and a partial vacuum is created in the smokebox. If the area of this border region can be increased, more combustion gases will be entrained and the draught on the fire will be increased.
A double blast pipe arrangement achieves this. Other solutions to the same end were the Giesl and Lemaitre multiple jet blast pipes with a single chimney orifice. The exhaust is softer due to the greater area, yet the draught is stronger, enabling lower grade fuels to be burnt.
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Post by Deleted on Mar 21, 2014 22:57:46 GMT
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Post by Deleted on Mar 21, 2014 23:14:54 GMT
Pete, get in touch with Ian Riley, you never know, he might just let you in with your camera. If you don't ask..... Hi Ed I think his works are a bit far from me being in Bury.... but I agree it would be worth a try... perhaps fit a visit in while holidaying near by.... I also need to do the same for the North Yorkshire Moors railway as a driver there has offered me the chance of photographing a set of LNER tools that I need to model... I guess it's possible to fit both in during a weeks break since they've not a million miles apart... not sure what SWMBO would say but have to admit to being very pleasantly surprised by how much she enjoyed the NRM yesterday and the fact that she's still talking about it today.... could I have a convert on my hands.... wow wouldn't life be bliss if this was so.... you can only hope... Pete |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Mar 21, 2014 23:17:50 GMT
hi pete,
i imagined you were staying in York for the weekend! hell of a long way to go for the day!
thanks again for the BOXHILL pics - you arent tempted to do a GLADSTONE or BOXHILL after DONCASTER?
cheers,
julian
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Post by Deleted on Mar 21, 2014 23:37:50 GMT
hi pete, i imagined you were staying in York for the weekend! hell of a long way to go for the day! thanks again for the BOXHILL pics - you arent tempted to do a GLADSTONE or BOXHILL after DONCASTER? cheers, julian Hi Julian No only the day, money it very tight and I'm most grateful to my wife for finding the funds to surprise me with this for my birthday... 2 hours 20 there with iirc 5 stops and 1 hour 54 return non stop.. It was a hell of a long day, left home around 7:30am and got back just after 10:00pm...I plan on doing it again one day though... As for what to build after 4472?.. this is a good question, right now I'll be content in just finishing 4472 which I suspect has many, many more years to go but I would also like to build a Gresley teak coach....or two. Then again I've also been giving a little consideration to a small tank loco in 7 1/4... bit of a pipe dream for now but hey stranger things have happened.... Pete |
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Post by gilbert on Apr 26, 2014 13:20:09 GMT
Great pics VB !
Whilst I can see splashes of red paint on axles and some strechers - could you tell if the inside of the main frames were painted red?
I am at the stage of painting the inside faces of my 9F frames and can't find any info on whether or not red was used.
Thx
Gilbert
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Post by vulcanbomber on Apr 26, 2014 21:07:19 GMT
Great pics VB ! Whilst I can see splashes of red paint on axles and some strechers - could you tell if the inside of the main frames were painted red? I am at the stage of painting the inside faces of my 9F frames and can't find any info on whether or not red was used. Thx Gilbert Thank you, hope you find them of use. The question you've posed is very interesting.... From my memory, 92212 was black, but she's well overdue a good scrub. This was talked about in my 9F build thread, you'll see on page 2 in the thread some pics of 92220 Evening Star's frames I took at york, very much red.... modeleng.proboards.com/thread/8734/5-inch-gauge-9f If you want/need any other pictures, let me know. David. |
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