Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I used to have a large (for me) HO layout when I was young & used all my spare funds left over from my paper route to buy Ho train items, have been casting an eye that way again as I have young grandchildren that would love to see trains running (at least that's the excuse I tell Ang) I am gravitating towards steam loco's & have always liked the more complex (bigger) engines.....my question is , do they have any trouble traversing standard radiuses because of their length ? thanks, Bruce