Hotend theory

Willy has done a number of interesting measurement series': http://forums.reprap.org/read.php?252,217620 . He adjusted his extruder to loose steps at some specific tourque, then he tried at different temperatures how fast he could extrude. The result is, the hotter the heater is, the faster one can extrude (not surprising) ans also, that this relation is pretty much linear (a bit unexpected).