Looking for drawings / diagrams GSR 101 class

[Jamie Davis]

Hello all, I'm writing here today in search of drawings/diagrams of what were the very common class 101 (GSR J16) locomotives. I need drawings displaying the side / front profiles of the locomotive, and any other good references of the locomotives shape. I need them for a 3D CAD model of the locomotives a friend of mine wishes to make, so details such as the boiler insides and other parts of the loco you can't see from the outside. Thanks all. Photos of the preserved example, No 186, attached.  image.png

[Mol_PMB]

I’d say the book ‘Steaming in Three Centuries’ would be a good starting point, to understand the many variations of boiler, frames, wheels, cab, tender etc in this large class. 
It contains several scale drawings of different variants, though these are modellers’ drawings not full-size manufacturing drawings. 
I imagine that some manufacturers’ drawings may still exist in their own archives (wherever they have ended up), you’re probably less likely to find Inchicore drawings. 
The RPSI might also be a good source of info. I imagine they have some drawings, but helping modellers isn’t their core business so you might have to build some relationships there rather than just jumping in with ‘I Need xyz’. 

[Mike 84C]

The IRRS did a booklet called "The 101 Class Locomotives of the GS&WR" The cover page also says Steaming through a century 1866-1966. Its edited by P.J. Flanagan,Ph.D.

It has a couple of side views with no scale and  a side, front and overhead section to 3/16" to the ft scale. These are all of locos in original condition.

I bought my copy S/H some years ago for  £8.50p so a trawl of s/h book sellers may be in order. I'm also sure the IRRS would have  the information you need if they have a librarian to dig it out for you! Maybe need to join the IRRS.

 Hope this all helps.

[Mol_PMB]

The tome ‘Locomotives of the GS&WR’ also contains several loco diagrams for the class, and some dimensions. However, the RPSi books mentioned above are probably a better bet for this particular class.