castle 1420 1800 kv and seaking 120a esc poof

[ninjanerek]

Ran this setup in my lucas oil for a total of about 5 minutes before the esc poofed. Also to note, running 48 mm prop. 6s. Im sure someone will get a kick out of this. My question: will the 180 a seaking handle the prop and 6s? Or should i also get a lower kv motor as well.

[champion221elite]

1800 kv on 6s is pretty hot. Combine that with a 120 amp esc and a 48 mm prop and you have a nice recipe for the release of magic smoke. A SK 180 will do better, but I'd drop down to the 1400-1600 kv range if you plan on sticking with 6s.

[deananderson8]

Been doing alot of reading here the last few weeks . . . . Reading your post ninjanerek, you were running a 1800kv Traxxas Spartan motor (I think it is a 540 size?) with a 120amp ESC and smoked the ESC on a size 48 prop. champion221elite you replied he might want to upgrade to a lower kv motor and a 180 amp ESC with 6s. Am I correct in assuming that higher voltage capable motors have lower amp ratings as well as lower kv ratings and Lower voltage motors run more amps and tend to have higher kv ratings? For example I have two 540 motors one has a 2050kv rating and a 24V max but is only rated 38amp max and has more resistance. I could in theory run 6s or 22.2 volts on a 100 amp ESC with a 440 prop and turn about 36408. The second has a 3100kv rating and only a 16V max but is rated at 56amp max but carries less resistance. This I could only run 4s max because of the voltage of the motor but I would need a 120 amp ESC and turn about 36704 with the same prop. Sound rite? So increasing prop size increases amp load on the motor correct? How do I figure load as I increase pitch and size, and which way should I go so that I can play with the prop setup and not fry my setup? Decrease kv and increase voltage while decreasing amps or the opposite increase kv and decrease voltage while increasing amp? Is there a formula? What way is the best way to go and is it safe to say with a 50000 rpm rated motor I should keep it between 24000 to 37000 rpm's?