Errors/Inaccuracies etc
Mistakes. We all make them, and if I was immune I wouldn't have to publish this errata sheet for my [hopefully first] book.
https://www.devboats.co.uk/gwdrawings/errata/GWRlocoDevelopmentErrataFirstEdition.pdf
At the moment I've been going through some of my sketches for the book, improving some of the older ones where I think I can do better now, and adding some new ones where I can.
I reuse everything I can, so coming to do a 79 class (1858 0-6-0) based on the Ahrons drawing in Holcroft's Armstrongs of the Great Western, I resolved to use as much as possible of my drawing of the slightly earlier and very similar 57 class. All well and good,and inside frames and motion went easily, whilst different size wheels are scarcely a problem, just count the spokes. So I got to the boiler. A quick cross check in RCTS confirmed that the principal dimensions are recorded as being the same, so I anticipated a straight copy and paste. Pasted it in and... Well, just didn't match.
An overlay of three of the Ahrons drawings in Holcroft (see below) seems to suggest that his 57 boiler is just a little short. I've lined up 57, 79 and 121 drawings in the image below and you can see the variation.
So what to do. The trouble is although we have boiler dimensions in RCTS, they are inside the cladding, so of limited use. So do I go with my source, or do I conjecturally amend? Rightly or wrongly I'm taking the view that as these are my sketches, not Ahrons, and as I claim to be doing more than simply copying his work, I'm going to change the boiler on the 57 to be what I think it probably was, rather than reflect the source. It was a nasty surprise though.
As a little something to amuse further, here's two other things I picked up. This is a page extract from C J Freezer's "Locomotives in Outline, GWR". You can see that my copy has angry pencil annotations. I was very detuned when I put these in, because I'd put the statement about lever reverse in the book, and had to make a desperate last second change as it went to the printers, for the proof had already been approved. Fainter are the words "Too short" above the bunker. Freezer had unaccountably drawn the same rear overhang on his 94 drawing as on a 57, which is of course too short, and there are all sorts of distortions of bunker door cutout and roof to cram it all in.
Compare the proportions on the real 94.
(photo 9466 group on Facebook)
Edited by JimC
To correct appropriate but sadly accidental misspelling in the thread title.
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