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#239 #blender #central #el #gobernador #locomotive #pacific #steam
Published: 2016-03-24 23:29:45 +0000 UTC; Views: 2185; Favourites: 44; Downloads: 0
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And here I thought I wasn't doing large steam...Related content
Comments: 27
Oh wow, you even modeled the weird valve gear the the locomotive and its 4-8-0 predecessors carried!
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What other valve gear would I model? 
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Both? What's the other?
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The later variation, as seen on my 4-6-0s.
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I see owo Is Mastodon up next?
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Hopefully, and then one of the tasteful little bobbers that tailed trains on the Mountain Division.
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I ssee owo
...Hmm, how different is El Gobernador's valve gear from Mastodons? The tubes sticking out of the slide valves...your render here, and photos, show them side by side for El Gobernador, while pics of Mastodon and this diagram for Mastodon have them on top of each other. paxaeternum.deviantart.com/artβ¦
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It was substantially different if that diagram is correct - the Goob only had one eccentric as far as I can tell, and the motion was instead augmented by a union and combination link as seen here. Photos also show Goob's two valve stems side-by-side as here. So, then, it appears that El Gobernador is in and of itself a further development on the design, as it's rather more simple than that you linked.
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How well did the El Gobernador gear work then? For comparison, The three eccentric, four slide valve per cylinder version on Mastodon allowed it to exceed the normal 85% used for tractive effort formula
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It worked like you would expect a valve gear to work. Stevens never used four valves per cylinder; he simply employed four valves total as compared to the standard two(one per cylinder). Putting the valves side-by-side allowed for greater clearances on the back end, and the combination link proved more efficient than did the three-eccentric system. El Goob bears a sort of intermediary valve gear, some time after Stevens discovered the Walschaerts valve gear. On the 4-6-0s, his engines abandon the inside eccentric and link system altogether, using instead a fly crank and abandoning the dual valve-stem in favor of a single-stem, double-valve system not unlike the later Poppet valves used on modern steam.
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Ahh, interesting! That's something you barely ever hear of...and I always though El Gobernador used the Mastodon style gear.
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I always thought the opposite; that valve gear diagram is something really "new" for me since so little information is available for Mastodon around...odd, when I consider it was only built three hours from here! But it makes a good deal of sense, given that it's so old...Mastodon's C/N was only around 15 or so as I recall, and it was one of Stevens' first completely original designs. What ambition!
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Construction number. Surprisingly enough the CP started making steam locomotives as early as 1873, but Stevens didn't really get a kick for designing for some years to come. Sacramento really had its own distinct style - engines there looked uniquely Western, and many of them used UK-style sandboxes, even European smokebox door locks on occasion. (El Gobernador, at least in some drawings, has one such door, and the number plate holds itself above the handle(which is that small handle poking out from beneath the number plate))
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Ahh, I see ^^ Mastodon also had 20 copies made by Cooke, with slightly bigger cylinders. I think they eventually became class TW-4, and Mastodon as TW-7. Though by that point, they looked almost identical to the TW-2 and -3, except for driving third axle instead of second. Dunscombs book shows a photo of of mastodon s final form.
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Absolutely beautiful driver animation.
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Ah, at last. I knew this monster would be coming along sooner or later. Enter 'El Gobernador'!
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I don't suppose it will go through curves and grades
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It will, though not many. The second and third driver-sets are blind, and the last one is coupled separately so it can move side-to-side.
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