Let's Make Robots!

Electro-Magnets

Hello evryone,

This is my first post on LMR for a long while, I used to be active under a diffrent username. 

To get to the point, I'm intressted in biulding a robot that utilses electromagnets, I'm thinking of wall climbing. Is this possible/realistic? What kind of specs (Current, number of coils, length) would sutch a magnet have?

Thanks in advance.

Nick