Technically speaking, it is a Crampton. They were popular for high speed running -especially in France. However this is a genuine US of A one.... This is one of the more famous of the Locomotives from : The Camden and Amboy Railroad. If you REALLY want some "what is it?" factor then visit here.
In my notes it's listed as 'an early Camden & Amboy 6-2-0'. Probably ca 1845. If memory serves, it was a very fast engine for its day--note the huge drivers. This was copied from the English who were busy making fast engines. The 'webbing' between the spokes is to keep gravel from getting sucked off the roadbed and paddled out into the countryside by the spokes. It is alluded to have reached 60mph regularly.
That's one of my favorite sites. The Pearson 9-footer is another I'd like to try my hand at someday, though in 45mm. It is gauged at 7', according to the text. Can you easily tell me--without pencil scratchings and whatnot--if one were to assay to model it, how would the dimensions be figured? The major dims, the 'footprint' so to speak. Please don't do any number-cranking, as I'm far from that project! (I am planning on putting up the first section of my benchwork tomorrow.)
See that tall pipe right behind the stack? A lot of early American engines are shown with one or two of those trumpet-mouthed protrusions on the spine of the boiler. I am driven to assume they are pop-off valves since some engravings show wisps of vapor issuing from them. What are they, really, do you know? Nowhere can I find a word about them.
Posted By ralphbrades on 03/27/2009 4:27 PM
To be honest it is actually quite simple... I just pick up my copy of "The British Steam Locomotive" and read off the dimensions from Page 109!!!
Wheelbase 25 feet 6 inches. Bogie Wheels 4 feet diameter. Front bogie 5 feet 5 inches between axles. Rear bogie 5 feet 9 inches between axles. Bogie pivot points 9 feet 6 inches from central axle
I can scan the pages on the Pearson Locos if you like (it will be tomorrow now GMT). And Sorry -I have no idea what the protrusions are...
I will have a look around my books for you -to see if I can find anything -but safety valves is a distinct possibility. Cocoa and Bed calls!!!
I'd appreciate it if you'd scan it for me and email it across.
Uh, not to press the point overmuch, but when I narrow the engine down from seven feet ... won't it look a tad tall 'n narrow? Or can I get away cleanly by dividing the 7' gauge by .6, to come up with width in 20.3 scale? (As I would for the other dims.) There'd of course be a little overhang, but that could be eyeballed easily enough.
Towards the end of the Broad Gauge there were "convertible" engines that were designed to run on the GWR 7 feet gauge and then the std gauge. You should have you scans by lunchtime Sunday (BST!) I doubt you would really notice the fact that the loco has been converted from Broad Gauge to std gauge. My suggestion is to narrow the boiler and then keep the rest of it "as is". It will only be when you look at the loco "head on" that you will notice anything amiss -and this can be explained away by the early design.
I will send you the Pearson scans and a few others that you might like to get the "feel" of 1830's locos.
Hmm, see I still haven't got this pic-posting down pat. The above is a Pearson's 9 foot single. Yep, the diameter of the drivers. It is shown as a 7-ft gauge, but I want to try to build it in 45mm @ 20.3 (Fn3.) Ralph already posted the dims, above. I'm still having problems knowing where and how to insert text. Anyway, here's astounding one, for sure!
Insofar as I understand what I'm doing, I have all but scan 4, apparently a picture, that won't load. It's the only one that didn't.
Also, I moused the parent file (or something) and nothing happened. So I went thru, entry by entry, downloading 'em to my satisfaction. (Or understanding, call it what you will.) THEN I noticed a big, fat Internet Web symbol on my desktop and clicked it--well, I'm a tad embarrassed to note that I now have TWO copies of what you sent.
I haven't as yet checked to see if scan 4 is included in the Internet one, but it won't load alone, as I've said. If it's of no consequence, forget it.
But I thought, given the size of that file, it'd be time-consuming, as in I could rare back and sip my coffee while the little green squares plodded across the window. But no. Zap, it was there, the whole works, and I didn't even see the screen blink. (That could've been my state of mind.
) Anyway, I now need a cup of coffee to unwind.
Thanks very much for taking the trouble to post all that! I owe you one. Or two.
My most humble apologies: I should have written 'scan 4' which shows as, when opened, a small X inside a box, which I take to mean as a picture. I apologize for my ineptness.
Added after post: I downloaded the parent directory, and even there it shows as described above. I just looked.
Added after Ppost: I must be witless today: it's the scan 4 in the federation news section. Both 3 & 5 are there and open, 4 is shown but opens as described. On my browswer, IE7, I usually get a flag that says 'cannot open, open with...' and a dropdown list. Nothing on this one.