I hate to correct you*but steam rollers actually wheel-slip massively especially when shown even the slightest incline. A traction engine on the other hand doesn't suffer from this problem as is inherent in its name.
*I don't hate to at all, it's actually quite fun
(*I don't hate to at all, it's actually quite fun
Quijibo Esq. BSc. May contain traces of nuts,
Sat 29 Aug 2009, 0:55,
archived)