Spreadsheet updated... err... postdated
I uploaded a compatible version of my spreadsheet:
I also finished testing on my 3rd DT rewind; a DT700 this time, if that matters. The goal was improving on the 16T-D:
Zippy-R 3s2000 (old)
alt/temp = 29m/24.1C
10410RPM/11.39V/1.61A -> 914Kv
7084RPM/9.98V/24.26A/50oz/73.3% <- requires high timing
Thrust measured on my stand, efficiency from latest DCalc.
Not nearly as impressive as 10x2T-21a-Y on 4cell, but it is a minor improvement to the 16T-21a-D. This stator had a ton of factory CA near the top of the heads; I was lazy and didn't pick it off. So unlike the 10x2, the 9x2 is doable with any given core.