North American 3' Logging Mallet locomotive

[ShrikeArghast]

I threw this together on a whim tonight, though I think it turned out pretty decently. Unlike most locomotives I model, this was not based on a specific, real-world prototype, but rather a Bachmann on30 conversion for their mallet (although I am sure there is [or was] and engine identical to this somewhere at some point). As is typical, I did not bother modeling running gear - a custom solution would be necessary, likely involving some smaller Big Ben wheels. In theory, despite the long wheelframe, this locomotive should be able to negotiate some exceedingly tight curves - only the forward set of drivers is mounted directly to the frame; everything else is on a wide-swiveling bogie.

Video (not a true copy, but the Niles Canyon Railway's 2-6-6-2 is a fairly close approximation, albeit standard gauge):

Prototype:

Model:

Edited May 24, 2016 by ShrikeArghast

[Daedalus304]

I am a huge fan of these engines (In fact I have built two!), and it is very interesting to see your rendition of one of them in 6-wide. It is also very interesting to me that you have built the forward engine as the one rigid to the frame; on the real locos the rear engine is rigid and the front has some very clever articulation for a good wide swing. I'm curious to see how well this design tracks, if you ever do build it.

Two things I feel I should point out is that your water tanks aren't tall enough (they should be taller than the top of the boiler), and the front pistons should be noticeably larger than the rear set (Which is what sets a mallet apart from a standard articulated loco). Those are somewhat small asides though to the fact that is is a pretty good 6-wide mallet! Are you planning to ever build it?

[ShrikeArghast]

Are you planning to ever build it?

Probably not. I am chronically unemployed and impoverished.

[LEGO Train 12 Volts]

Interesting model and amazing project!

[Railfan9]

I have the G scale model on my mantle. It is a massive model

[JopieK]

Great train ShrikeArghast you really caught it well!