Brushless motor control

[craig_colliass]

Just a thought I had.
Has anyone made a bar spinner with a propeller profile so when it has spun up it pushes the robot to the arena for better traction and makes it less likely to throw itself OOTA!

[grant_ploughbot]

That was discussed at the Robo Challenge Open Day.
The aero dynamics of a bar make a huge difference to the current draw. Simply profiling the edges can take the current draw down from say 80A constant to way below 40A. Providing enough downforce is likely to take a good couple of Kw to do effectively.

[typhoon_driver]

Problem with that would be if the profile gets damaged it wouldn't provide the same downforce. Much better to just use magnets in the robochallenge arena.