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 <foaadd...@gmail.com> 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 rctankcombat@googlegroups.com > To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com > 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 rctankcombat+unsubscr...@googlegroups.com. > 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
