<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1454145865918_2479">I had an initial pool test of my brushless thruster yesterday.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">Thruster is on projects page <a href="http://www.psubs.org/projects/1235435392/brushlessthruster/" id="yui_3_16_0_1_1454145865918_2517">http://www.psubs.org/projects/1235435392/brushlessthruster/</a></div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">A bit of a mixed bag. Firstly I was testing it on 36-37 V & not 44 that it was designed for,</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">due to size restrictions on import of Lithium polymer batteries. I will buy the additional voltage.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr"> I was getting 5kg (11lb) thrust off 150W & 10kg (22lb) off 515W, which is comparable &</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">better than some commercial direct drive BLDC thrusters that I have specs on.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">However I got to 13kg thrust & the propeller seemed to slip at that point & even though </div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">it was running at 2,200W I wasn't getting any more thrust. I was only a couple of feet out </div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">from the pool edge when testing, so that could be contributing.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">Another factor could have been that the seal leaked badly & the motor was short circuiting </div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">through the water. Why did the seal leak? Possibly I damaged it hammering it in to it's housing</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">or because I didn't polish up the propeller shaft. </div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">I have other motors I will be testing, so a lot more work & learning to do on this one.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">I did notice I had the same problem as Cliff, with the motor wiring starting to wear through</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">where it comes out of the housing.</div><div id="yui_3_16_0_1_1454145865918_2479" dir="ltr">Cheers Alan</div></div></body></html>