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trainboi In reply to PaxAeternum [2015-01-26 05:52:13 +0000 UTC]

That makes sense, thanks for the clarification. I will adjust the title accordingly.

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PaxAeternum In reply to trainboi [2015-01-26 05:58:06 +0000 UTC]

all of gresley's large designs were three-cylinder simples, it is what made them produce power development to attain such high speeds, as well as a much more even mean-torque (average torque).   THeir biggest design flaw was the conjugated valve gear for whipping reasons at high speeds, this produced valve over-travel and made the inner cylinder have a timing delay and a higher cutoff than the others.  THis worked havoc on the rodbearings and crank journals

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trainboi In reply to PaxAeternum [2015-01-26 06:18:46 +0000 UTC]

Yeah, I've heard the larger engines on the LNER were an absolute pain to maintain because of that. I think the conjugated valve gear as a concept is clever, but it should probably have stayed in freights and mixed-traffic engines. But I suppose Gresley figured that the third cylinder design was worth the cutoff limitation at 65 percent(to prevent the moguls literally shaking themselves to pieces - havoc indeed).

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PaxAeternum In reply to trainboi [2015-01-26 06:28:52 +0000 UTC]

some of the engines didn't have the cutoff limitation.  It is an excellent valvegear in principle yes but it does not fair well at high motion RPM's, which can be present at speed in small-drivered freight and mixed traffic engines as well.  It was done principally to save space and motionwork, the correct thing to do however is have the same valvegear you've got on the outside placed on the inside working the valve to the third cylinder by itself, tied into the reversing shafts.  

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trainboi In reply to PaxAeternum [2015-01-26 06:44:28 +0000 UTC]

That would certainly save wear, although considering the different angle adopted to clear the leading axle, there may not have been space for it. That's just speculation, of course; I'm sure there still would have been a way to make it work.

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trainboi In reply to 123Chance [2014-08-03 04:25:28 +0000 UTC]

Thanks, though you have Gresley to thank for the paint job.  

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trainboi In reply to Iscreamer1 [2014-07-12 00:17:12 +0000 UTC]

If you'd happen to have good drawings for either of the engines mentioned above, then I would love to see them, but that's what's been stopping me, I'm afraid. I did a module of Copley Hill Leeds a few months ago and that's the time I started looking for a B12, then when I found the GCR on the Download Station, I decided to look for a B17, but I've not found either as of yet.

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Iscreamer1 In reply to trainboi [2014-07-12 15:10:08 +0000 UTC]

Here is one for the B12: wandering1500.co.uk/pages/tech…
and one for the B17: www.isinglass-models.co.uk/htm…

That's what I could find for free. As a bonus, could make 98462 and 87546 from "The Three Railway Engines" out of them since the 98462 on Northwestrailways.jimdo doesn't not work for Trainz 2012 due to too many errors I can't seem too fix and the last time I checked on SI3D proboards, someone was making models of the Naughty Blue Duo, but they are private models for only a few select people and I am not one of them.

but you can still do the engines the way you want to do it.

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trainboi In reply to Iscreamer1 [2014-07-13 00:15:40 +0000 UTC]

Thanks for that, I'll very happily make these engines(and then lose productivity because I'll run them constantly). I probably won't make TTTE versions, although if the demand arises I may do eventually. But thanks, because it opens up a huge operating potential on one of the greatest routes made thus far.

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trainboi In reply to flattenedsteamroller [2014-07-11 19:55:52 +0000 UTC]

Check the DLS, there's a newer version up. Not sure precisely which version it's on, but it's on the DLS.

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flattenedsteamroller In reply to trainboi [2014-07-15 21:22:12 +0000 UTC]

I got it fixed too bad there isn't a Gresley high pitched whistle sound on DLS

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trainboi In reply to 2509-Silverlink [2014-07-04 22:25:49 +0000 UTC]

That was an error in the model on which I based the paint job. It's corrected in-game, but at the time this was made I hadn't actually been able to find any photos of it in LNER black.

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