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Re: *Warning* On talons!!!!
Just some random subjective data, but we've been running fanless Talons in our prototype drivetrain for many weeks now stopping to change batteries and the talons are hardly warmer than ambient to the touch. This is with 4 CIMs and 40a breakers and a ~120lb total robot weight incl. battery (so a bit light) on carpet geared fairly aggressively. I would begin to worry about heating the battery cable and CIMs before I worry about warm talons.
A CIM in a drivetrain will pull full stall current immediately at launch. It will taper down to a much lower level very very quickly, how quickly is dependent on gearing, mass to accelerate, and voltage drop.
Use fans if you want. Think of them as speed controller insurance with a 20 gram weight penalty.
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Kettering University - Computer Engineering
Kettering Motorsports
Williams International - Commercial Engines - Controls and Accessories
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