The U.S. Army's transportation museum is located at Fort Eustis, Virginia.
It has the remnants of the railroad used to train soldiers to operate railroads.
In the Great War, and WW2 much of the military rail service was staffed by drafted/enlistee railroaders.
However, for peace time purposes the CoE'/Transport corps maintained a base at Ft. Eustis for training men to operate Fortress, or other army
base railiroads.
Fort Eustis Museum, has blueprints for most of the locos
built expressly for the military. They also have/had some for other locos
and rail equipment that they operated which were sent to the National Archives and I believe the Smithsonian's Museum of Transportation.
Notwithstanding, these rather antique materials are not subsumed in what you seek.
Fort Eustis Museum is not in the business of selling document copies to the public, but since you are a legitimate historical group attempting to
restore an artifact locomotive they probably would be amenable to that end.
A wise approach would be to assemble a list of the appropriate
drawings sought (preferably with the US Army coding: for the
obvious reason that the military loves their document/part numbers=
secondary to the fact that it allows people with no knowledge of a
given item to store, and dispense same, correctly). Then using the
offices of a Royal Engineer to contact the RA's attache to your embassy
in Washington.
If you can't manage to get him to do it for you, then,
have a Senior RA Engineer write a cover letter on appropriate Royal
Army stationary to the U.S. Army Transportation Museum at Fort Eustis.
That should get your request more prompt attention, than coming
from a railfan groups project.
Good- Luck, Peter Boylan
