<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Vance,</div><div>that sounds like a good solution, thanks. The shafts out of most of these brushless motors</div><div>are very short so a flexible coupling would be a solution to that problem as well.</div><div>Alan</div><div><br><br>Sent from my iPad</div><div><br>On 8/09/2014, at 12:01 am, via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><font color="black" size="3" face="Arial, Helvetica, sans-serif"><font class="Apple-style-span" size="3">Alan,</font>
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<div><font class="Apple-style-span" size="3">You could take the thrust issue out of the system entirely by the addition of your thrust bearings in the seal package. Use a flexible coupling between inner shaft stub and gear or motor output, then all you have to plan for is torque.</font></div>
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<div><font class="Apple-style-span" size="3">Vance<br>
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<div style="font-family: helvetica, arial; font-size: 10pt; color: black; ">-----Original Message-----<br>
From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Sent: Sun, Sep 7, 2014 12:04 pm<br>
Subject: Re: [PSUBS-MAILIST] Brushless Thrusters<br>
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<div>Thanks Hank,</div>
<div>in hindsight, the thrust bearing would have to be in the planetary gearbox.</div>
<div>This may simplify things as I could possibly mount a gearbox with thrust bearing on to</div>
<div>any suitable motor. </div>
<div>Alan</div>
<div>Sent from my iPad</div>
<div><br>
On 7/09/2014, at 9:07 pm, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br>
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<div>Alan<br>
When I upgraded the cartridge seal in Gamma, I needed a pretty Beafy thrust bearing, it was no problem to get. have since changer to Magnetic. I think you could replace the bushing in a thruster with a ball bearing and never look back. <br>
Hank</div>
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<span style="font-weight:bold">From:</span>
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Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>; with <br>
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<span style="font-weight:bold">To:</span>
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Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>; <br>
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<span style="font-weight:bold">Subject:</span>
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Re: [PSUBS-MAILIST] Brushless Thrusters <br>
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<span style="font-weight:bold">Sent:</span>
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Sun, Sep 7, 2014 1:43:49 PM <br>
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<div>Hi Hank,</div>
<div>the kort nozzle on the Indonesian thruster looks a bit Naff. </div>
<div>( I am designing an art work here.)</div>
<div>I could get a price for the unit without kort nozzle, but</div>
<div>I'm wondering if I could build something for 1/2 that price.</div>
<div>There are some reasonably priced brushless motors about.</div>
<div>I don't know that I could just retro fit a thrust bearing inside the can of the motor.</div>
<div>I tried to put a thrust bearing for reverse inside my brushed thrusters, but</div>
<div>couldn't find one with a thin enough section to fit.</div>
<div>Also the motors are a bit expensive to just buy & hope you can fit one.</div>
<div>How did you fit the thrust bearing on Gamma? Did the propellor shaft extend out the back</div>
<div>of the motor?</div>
<div>Alan</div>
<div><br clear="none"><br clear="none">Sent from my iPad</div>
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<div><br clear="none">On 7/09/2014, at 7:22 pm, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div>
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<div>Allan<br clear="none">Dont worry about thrust bearings to much. They are aesy to get, I bought one for Gamma , real heavy duty for 80 dollars. Personally I would just use a good quality bearing and replace it once a year for 8 bucks, if it is a small thruster. Are you not happy with the Indonesia thrusters? Or to pricey?<br clear="none">Hank</div>
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<span style="font-weight:bold;">From:</span>
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Alan via Personal_Submersibles <<a rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>>; <br clear="none">
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Personal Submersibles General Discussion <<a rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>>; <br clear="none">
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<span style="font-weight:bold;">Subject:</span>
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[PSUBS-MAILIST] Brushless Thrusters <br clear="none">
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<span style="font-weight:bold;">Sent:</span>
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Sun, Sep 7, 2014 11:58:56 AM <br clear="none">
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<table cellspacing="0" cellpadding="0" border="0"><tbody><tr><td colspan="1" rowspan="1" valign="top">Hi people,<br clear="none">I've spent several hours today looking at brushless thrusters & wonder if anyone else has looked at them or got any ideas. There is the Indonesian thruster I posted a few weeks back at US 2,200. There is also the Haswing Protruar 2hp that Emile has; however they state that it's for fresh water only, & I think Emile said it was a bit noisy.<br clear="none">The inrunner motors that have the winding on the outside, seem a good option as they cool through convection to the can. They also need higher revs for torque & require a planetary gear box or similar. ( which a lot have built in)<br clear="none"> I was looking at the option of making my own thruster, however the motor would require a thrust bearing & I don't<br clear="none">know of any that would have one other than
maybe a high powered battery operated drill.<br clear="none">Any thoughts, suggestions thanks.<br clear="none">Alan<br clear="none"><br clear="none">Sent from my
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