Using the 350W geared Unite gear motors, I have blown a 30A fuse, but only once. My Sturmtiger blew the fuse (about 110lbs.) when I stalled the motor trying to climb a tree stump. I have a 70A main breaker from the batteries to the distribution point. Never tripped the 70A breaker. I did just about melt two 7AH batteries drawing too much current from them during testing on my KV-2 (150lbs) using the 450W Unite gear motors. The cases were deforming because of the internal heat being generated.
Derek On Wed, Apr 9, 2014 at 9:38 AM, isaac goldman <[email protected]>wrote: > FET absolute maximum current rating is not the point here. Of course they > are rated for over 60 amps. Theres a key difference between transient and > continuous loading. > > The issue is that those same fets derate rapidly with heat; you might get > 160+ amps at 20 degrees, but it goes down very fast as they get hot, which > in turn happens very fast if you have a small heat sink like the Talons do. > At 40 amps none of this is an issue; at 60 the small heatsink is a concern > and at 100 its a fatal flaw. > > > On Wed, Apr 9, 2014 at 10:20 AM, Loic atFOA <[email protected]> wrote: > >> I use x4 Talon SR >> http://www.fieldofarmortanks.com/product_p/foa-talonsr.htm (shameless >> plug!) on both FOA Tiger I <https://www.youtube.com/watch?v=uXyqYxMlUvg>and >> Panzer >> IV <https://www.youtube.com/watch?v=bJhG2f55sOA>. I have been running >> those tanks A LOT for the last few months. I have a 30Amp fuse on each >> motor. Never blown a fuse. >> >> I should make notice that the Tiger I is about 140 lbs, and Pz.IV is >> about 110 lbs. I think weight is critical as to the amp draw to the motors. >> I would also assume that friction is also critical (i.e bushings, bearings, >> track design) >> >> As Steve noted above, I also talked to Mike (the designer of the Talon) >> and he doubts we go over 20 amps on normal operating conditions (continuous >> run for 39 min @ 4 mph, going over curbs, donuts on high grass, climbed >> small hills). He deals with ROBOTS that fight like Sumo Wrestlers. When two >> robots go against each others, it sure could spike your amp usage. That's >> what Talon's are built for! >> >> Loic >> http://www.fieldofarmortanks.com >> >> -- >> -- >> You are currently subscribed to the "R/C Tank Combat" group. >> To post a message, send email to [email protected] >> To unsubscribe, send email to [email protected] >> Visit the group at http://groups.google.com/group/rctankcombat >> >> --- >> You received this message because you are subscribed to the Google Groups >> "R/C Tank Combat" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Isaac Goldman > 5142334423 > > This message contains confidential information and is intended only for > the individual named. If you are not the named addressee you should not > disseminate, distribute or copy this e-mail. > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > Visit the group at http://groups.google.com/group/rctankcombat > > --- > You received this message because you are subscribed to the Google Groups > "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
