spinners, wheels, propellers, etc

[farmerben]

I want more rotating parts to attach stuff too.  I don't mind installing mods, but I haven't found what I'm looking for.  

Stock propellers are really tricky to make and optimize.  There are plenty of youtube videos to get an idea on how to make these.  But, the ones I made are crappy, and there is just so much detail to work through.  I have a mod for rotating docking ports, that even has a step motor part, but these are for robotics not high velocity spinning.  I tested airplane parts plus which has lots of gas driven propellers, but I'm looking for a basic electric spinner with some rpms.

Wheels don't work upside down.  Why not?  One obvious solution to rover flip over is to put wheels on the roof of the rover so it can drive upside down.  It doesn't work.  Wheels that are not in the most orthodox orientation in the space plane hanger, seem unable to get traction under any circumstances.