[nativepaul]

I run the Mini Hydro class which is for hydros under 450mm/17.5" with a 110g battery which equates to a 1500mAh 3s and a 5 minute race duration I run a 3000kv 400 size motor spinning a detongued and backcut Octura X427, too fast for most pools unless you are very wealthy and have a full size pool. The Castle Icelite 50 is quite popular in this class, you have to waterproof it, but the average amp draw is only 10-12A so watercooling is not needed, I used to run a Phoenix 35 in the same class (again waterproofed but not cooled and it was plenty big enough for the job and a chunk lighter but the info from the 50 is very nice.