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White Witch, Concept Layout by steamby51 White Witch, Concept Layout by steamby51
Doing an animation project with a locomotive in it.  Naturally the locomotive is taking up more time than the entire rest of the assignment because I decided to draft design her from the ground up.  This is three-cylinder simplex "White Witch", a 7 foot gauge 4-8-0 loosely inspired by the churchward shape and the Stanier simplex-three propulsion, but with basically no loading gauge.   This locomotive stands 18 feet tall at the top of her stack, has ten foot driving wheels and has a common cylinder bore of 42".  Valves are deismodromic poppet type driven by an oscillating cam setup, actuated by three seperate internal Bakers valvegear.
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:icondinodanthetrainman:
dinodanthetrainman Mar 9, 2014  Hobbyist Digital Artist
"I decided to draft design her from the ground up" That is the only way to do it! :)
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:iconbartpaaddiator:
I wonder what the project itself is and what is the role of this locomotive in it, if that info can be disclosed. I am happy that you are able to incorporate those things into assignments.

Now about that engine, I see most questions that could have been asked, had been asked, however I wonder about that short, open cab. It looks, maybe due to the large size of the rest of the engine, uncomfortably small. Is there going to be an Indian style half-cab on the tender or something of the sort?
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:iconsteamby51:
You shall see, sir.  


She will indeed have a half-cab, yes, but I always saw her as rather spartan.  Uncomfortable it may be, but exhilerating and invigorating there is no denying.   The cab is larger than you'd think, with the engine being 7 foot gauge.  
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:iconatticus-w:
This reminds me of that conceptual Great Western 4-8-0, although, of course, with deranged dimensions. X3 She does have nice clean lines.

Definitely liking the French-esque cylinders and valve design.  That always struck me as a paradoxically elegant look, given all  of the complicated outside machinary that it entails.  (But then, French locomotive design comes across that way in general, doesn't it. XD)
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:iconsteamby51:
Yessssss that is SORT of what I was aiming for.  THe king and castles would have looked excellent as 4-8-0's.   I of course love deranged dimensions.  XD



You and I both know that french stuff is marvelous.
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:iconsteamrailwaycompany:
SteamRailwayCompany Feb 19, 2014  Hobbyist Writer
With no loading game to challenge designers nor constrain designs, do steam locos have more potential ability necessarily? 
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:iconsteamby51:
THe answer to that question is undoubtedly yes.................... British locomotives suffered incredibly from their own loading gauges.  The fact that the largest cylinder bores in england permitted by these designs were about 22" bore is a testament to that.

The question is almost absurd, I don't understand it....
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:iconsteamrailwaycompany:
SteamRailwayCompany Feb 19, 2014  Hobbyist Writer
Personally, I somewhat like the different loading gauges as they posed a challenge for designers to make the most of their locomotives, and made a diversity of sizes of locomotives even amongst identical track gauges. But a steam railway without a loading gauge altogether would be interesting to see. 

Well, excuse me. 
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:iconsteamby51:
Loading gauge, whereas in some cases it is positively required, is a telltale of backward thinking.   Whereas I am not usually a fan of American practices, there was one thing we did incredibly well in this country, and that was make things bigger when they needed to be.  Here, the loading gauges grew as the locomotives got bigger, whereas in Britain they stayed the same, and even got smaller.  

It is not to say however that the loading gauge did not result in creative thinking, hence why british locomotives tend to be more elegant than our monsters, however the laws of physics dictate that constrained to certain limits there are things one cannot do.  This is why things more powerful than a King class never happened in England.  Boiler diameter and hence firebox size, wheel diameter, and cylinder diameter were all constrained to almost nonsensically small dimensions.  


Even if no loading gauge were instituted, there would be a natural one that designers would not tend to exceed, when the locomotive began getting ungainly tall and wide in relation to the track gauge as to become topheavy and unstable.  However not even in America did we reach this point.
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:iconlocomaster:
locomaster Feb 20, 2014  Hobbyist General Artist
What about The LMS Princesses? and the BR standard 9F's? Sure they don't compare with the Big Boys or Challengers but they were definitely more powerful than the Kings...
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