I don't know what topic it was, but someone scratch built one of these. Then I found out a company makes them in O gauge:
http://factorydirecttrains.com/winanscamellocos.aspx?utm_source=delivra&utm_medium=email&utm_campaign=ohon
I'm not sure if you may know the topic, but I thought it was interesting...
Josh
Almost as interesting as the loco are the B&O "pot" hopper cars. They too hung around for a long time. I believe the Winans stack assembly was intended to be a spark/cinder catcher, with the cinder reservior being the tube ahead of the smokestack.
I first saw that site a few years ago and have been watching it develop. I never said anything here because it is not Bachmann, plus it is O scale.
The Camels had many modifications over the years. There were three versions from the factory in the 1850s. Short furnace, medium furnace, long furnace. A few were short furnace without the firing chutes and did not have the sloping firebox. According to White, they were finished in a "dreary green" and roughly finished. Ross Winans did not waste money on "fancies". The trottle lever could be operated from the right side or left side of the loco. Out of an estimated two to three hundred made, only to blew up. A few were made for broad gauge.
The locos where made primarily for hauling hard coal and the Camels were fired by hard coal. They usually operated at less than ten miles an hour. B&O got rid of the last Camel around 1898.
The Last of the Camels.
http://catskillarchive.com/rrextra/abboc.Html
Links if you get bored.
http://books.google.com/books?q=winans+camel&btnG=Search+Books
The photos I posted of mine in the past were of the type without the sloping firebox.
There is a pot hopper in the B&O roundhouse but it is a larger version than the ones used in the 1850s.
More links.
http://www.google.com/search?hl=en&ned=us&q=b%26o+pot+hopper&btnmeta%3Dsearch%3Dsearch=Search+the+Web
Rich