6-axle engines are built for 22" or broader curves - an SD40-2 might travel around an 18" curve, but the cars behind will probably derail from the coupler overhang on the engine.
As the man says in _The Hunt for Red October_: "Possible...but not recommended." . If you haven't bought the engine yet, I'd stick to shorter engines with 4-wheel trucks.
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Bentnose Willie
Maitland, NS CANADA
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Love my MLWs!
[This message has been edited by BentnoseWillie (edited 11-29-2002).]