<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Thanks Cliff,</div><div id="AppleMailSignature">I couldn't download the zip but you have given me some ideas from</div><div id="AppleMailSignature">what you have said. </div><div id="AppleMailSignature">I might just put a removable pin in & remove the vertical section to change</div><div id="AppleMailSignature">the propellers. Most of the propellers have different shaft sizes so will</div><div id="AppleMailSignature">probably take the vertical unit back to the workshop to remove press fitted</div><div id="AppleMailSignature">sleeves.</div><div id="AppleMailSignature">The extension ladder can be retracted back to get at the test unit.</div><div id="AppleMailSignature">Have a 48V rectifier so can keep this running day & night. </div><div id="AppleMailSignature">I am initially testing the small 6374 60kv brushless motors as I had some good </div><div id="AppleMailSignature">results previously. Steve from Australia is playing around with the same motor</div><div id="AppleMailSignature">& Vesc motor controller. You can supposedly extract the rpm, amp draw, Voltage</div><div id="AppleMailSignature">& motor temperature from the esc, & I have a guy working on that.</div><div id="AppleMailSignature">The main thing I am looking at is getting good efficiency with this small direct</div><div id="AppleMailSignature">drive thruster, & avoiding a gear box. </div><div id="AppleMailSignature">Will keep you up with the play.</div><div id="AppleMailSignature">Cheers Alan</div><div id="AppleMailSignature"><br>Sent from my iPad</div><div><br>On 16/05/2018, at 1:29 AM, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>Alan, I sent you a compressed file to your private email address. </div><div><br></div><div>Basics of the tester was a hinged boom that lowers the thruster into the pool. The bollard thrust was measured with a load cell. Thruster speed was measured with a mag pick up on a shaft and a frequency input module in PLC. PLC was used to take measured analog signals and data logging. Touchscreen HMI was used to control and display results. System used three 100 Ah batteries connected in series to drive thruster. Also measured the current and voltage on thurster. Included a power point file of a psub presentation I did on the test a while back. </div><div><br></div><div>I am interested in the results you get from your thruster. Keep us in abreast of testing progress.</div><div><br></div><div>Regards</div><div><br></div><div>Cliff</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 15, 2018 at 12:16 AM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Cliff,<br>
you don't have the plans or pictures of your thruster testing<br>
set up do you?<br>
I have just bought an extension ladder to extend my thruster<br>
testing jig out in to the pool further to eliminate the backwash off the side,<br>
& am wanting to make the jig a bit more professionally than last time. <br>
Have a bit of an idea of how I'm building it but may gain some <br>
ideas from how you did it. <br>
BTW just ordered the aluminium version of your parker relieving regulator<br>
as it was a few hundred dollars cheaper than what I could buy the 316. <br>
Will pull it apart & look at anodising it.<br>
Cheers Alan<br>
<br>
<br>
Sent from my iPad<br>
<br>
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