I have recently purchased a number of N locomotives and rolling stock from an old friend who is moving from a house to a small apartment, and doesn't have room for his train set.
The locomotives are as follows:-
81159. 2-8-0 Consolidation Steam Loco, New York Central (approx. 5" length)
82758. GE EMD SD-45 Diesel, Union Pacific (approx. 4.5" length)
86060. GE DASH 8-40 CW Diesel, Santa Fe B/Y War Bonnet (approx. 4.5" length)
The track is Peco Streamline (flexible) with a number of turnouts.

My question is - what is minimum radius for locomotives to run on (I suspect that a larger radius required for the 2-8-0 than the Diesels?)