12s Protos 500 - RC Groups
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This thread is privately moderated by flint723, who may elect to delete unwanted replies.
Feb 01, 2013, 03:18 PM
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Build Log

12s Protos 500

So I finally got my 12s Protos in the air today. I didn't go 12s for more power, just for efficiency and the ability to share packs with my 6s 450. And maybe just to do something a little different. Here's the setup:

Stretched plastic Protos w/ low fbl head
RJX 470mm mains
Savox 1250mg's and a ds650 on a LiFe unregulated
Kontronik Kora 25-16 420kv (220g) with the MSH long motor shaft & 13t pinion
Ice2 HV 40a
(2) Nanotech 1300mah 35c 22.2v packs (217g each)

I run low head speed (2300) on this because it's plastic and for longer flight times. It has plenty of power for what I want it to do (not smack 3d). I had landed in the middle of the maiden flight just to check motor and esc temps. Both were just barely warm. Although the 28F ambient temp probably helped. As far as power, it seemed to have more than when on 6s, but not that much difference really. But I had the 3226-900kv before which is a beast. The log says there was less bogging than with 6s though, On 6s the gov maintained it within +/-200 rpm of requested rpm and on 12s it maintained it within +/-150 rpm. The flights were not extremely demanding but I did plenty of pitch pumps, loops, and tic-tocs, so I don't expect to see much higher amp peaks than what's on the graphs. It pulled 8a in a hover, 10a avg, and 26.6a peak. The first flight was 4.5 min (3.8v/cell) and I put 750mah back in, so I used about 60%. 2nd flight I did 5 min (3.78v/cell) and put back in (unknown yet).

So far I am happy with this mod and it wasn't even very expensive. Motor was $133 shipped directly from Kontronik and the esc was like $85 shipped from neumotors.com.

Maiden esc log:
2nd flight esc log:
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