Allegheney "pivoting" engines?

[wobblinwheel]

I just saw a video on Youtube taken from the Henry Ford Museum about the C&O Allegheney 2666 locomotive. In the video, the narrator states tha BOTH engine groups on this locomotive pivot independently. Is this true? It seems that all other articulated locomotives I've read about only swivel on the FRONT engine. The rear set remains stationary. Anybody know the poop on this?

[twhite]

On the prototype of ANY prototype American articulated locomotive, the front driver set swivels, and the back set is firmly attached to the boiler and firebox. 

The narrator has probably been watching too many contemporary plastic articulateds running on  18" radii on HO model railroads.

Tom

[challenger3980]

  Oh come on now Tom, I've got  4 Challengers, 3 Big Boys and a Cab-Forward, in Die-Cast metal O-Gauge, that will get around 15 1/2 " Radius curves, it's not just the plastic HO that get to have all the fun

The top two in the left column are an H-7 2-8-8-2 (former C&O ) and a Y-3(former N&W). The top of the right column is a Big Boy, the Bottom of the right column is an AC-9  2-8-8-4, theese are Scale sized models that require 072 curves(36" Radius), the scale models are properly Articulated. The others are all Semi-Scale, and Double Articulated, they will handle 031 (15 1/2" Radius) curves.

Doug

[CSSHEGEWISCH]

wobblinwheel

I just saw a video on Youtube taken from the Henry Ford Museum about the C&O Allegheney 2666 locomotive. In the video, the narrator states tha BOTH engine groups on this locomotive pivot independently. Is this true? It seems that all other articulated locomotives I've read about only swivel on the FRONT engine. The rear set remains stationary. Anybody know the poop on this?

It sounds like the narrator was thinking of a Garratt.  Also remember that Lionel Wiener also classified Shays and other geared designs as articulated locomotives.