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Old May 20, 2010, 03:40 AM
Truglodite is offline
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Carmichael, CA
Joined Feb 2007
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Spreadsheet updated... err... postdated

I uploaded a compatible version of my spreadsheet:

http://www.rcgroups.com/forums/showa...2&d=1274343368

I also finished testing on my 3rd DT rewind; a DT700 this time, if that matters. The goal was improving on the 16T-D:

DT700-9x2T-21a-Y
Zippy-R 3s2000 (old)
alt/temp = 29m/24.1C

no load
10410RPM/11.39V/1.61A -> 914Kv

GWS 1060hd
8254RPM/10.68V/14.61A/33oz/76.3%
APC 10x4.7sf
7738RPM/10.49V/18.22A/39oz/77.0%
APC 11x7e
7288RPM/10.24V/21.27A/42oz/78.3%
APC 12x6e
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.

Kev
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Last edited by Truglodite; May 20, 2010 at 03:49 AM.
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