Scorpion outrunners and ESCs

[pmisuinas]

OK, need the experience of the group. I currently am running a CC120 ESC with a Scorpion 3026-1210 (it's a scale boat, so when I upgraded from the brushed motor I just looked for a performance increase, without realizing that I should have been going for more Kv). I am using the CC120 because the motor draws nowhere near that much current and I wanted a lot of safety margin. I got CC because of my aircraft experience and also I got (at least what I thought) a really good deal.

I am now thinking of replacing the -1210 with a -1600 or -1900, but reading here it seems this motor does not do well with CC ESCs? Anyway, the real question is what ESC should I be looking at? Turnigy 120? Swordfish 120? or can something be done to adjust the CC ESC to make it work better?

I would also ask what prop would work best (subsurface drive, 12v). I can fit up to a 52mm prop before I run out of room. TIA...Pete M

[m4a1usr]

Try setting your CC120 to low or normal timing and the starting power to low or normal to begin with. I would think the settings will be low on both but you may need to stick with low on the timing and end up with high on the high power setting to get the outrunner to run well.

When I had a hydra in my SV27 it liked low for timing and normal for power. But that is a 6 pole motor inrunner.


John

[sailr]

Outrunner motors typically require higher timing, 15 degrees or so.

[Fluid]

The only outrunner I have much experience with is the Scorpion HK4025/6. I have run the motor on 6S1P/4500 with two different Castle controllers - a Hydra 240LV and an ICE 100. The motor ran great on both, pulling around 110 amps average. I used 15 degrees timing advance on both controllers and 8 kHz switching frequency on the ICE (not programmable on the Hydra). I ran for ~4 minutes with the Hydra and nothing got over ~110F. The ICE did get hot, but I was running over its amp limit without cooling. A small fan would have solved the heating issue, but regardless the controller did not thermal and still works great.

I don't know how much of this experience will transfer to the 3026 motors, but I suspect most of it. The motor definitely ran better and cooler on 15 degrees, just as the Scorpion distributor recommended. Both Castles worked great. Just match whatever ESC you get to the estimated amp draw, and keep the voltage under the controller's rated maximum.


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