[gburlison]

I thought 4 fans were overkill, but once we decided upon a design for a shroud, it had 4 sides that were just the right size for a fan. Can you imagine the grief we mentors would get if the motor overheated because of a full current stall, and there were only three fans because I talked the students of the four one. The student that designed this was already talking about adding the second shroud in a pull configuration, but that would requre 5 additional fans and we do not have the clearance for it.