| What would be the practical difference between a plough plane, and a
| router plane? I have a Stanley light combination plane (the one
| with 17 cutters), that I use very often to do dados, slots, etc. So
| far it satisfied all my needs.. but that makes me wonder what would
| be the purpose of a router plane. It seems to me that a plough
| plane would be more versatile, but as I never had a router plane, I
| can't tell.. Is there any situation in which a router plane would
| be better?
A router plane excells at producing an even surface at a fixed depth
below the surface of a workpiece where edges are already well-defined.
It works as well for irregular boundaries as for straight line
Your plough plane excells at cutting grooves and simultaneously
producing well defined edges and lowered areas in straight lines.
The two don't really compete for work.
DeSoto, Iowa USA