<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>I talked to a hydraulics guy a few days ago about making a seal for my motor pod. I told him I had a high pressure tank that I wanted to turn a shaft inside the tank to stir the contents at 250 psi, ( didn't want his eyes to glaze over if I mentioned submarine !) Anyway he directed me to a system using a bronze fitting that would tighten down these rings he called "cheverons" they are mating rings of a very high durometer . the bronze is for mating with stainless . I would have to machine an assembly for this , but once I have my shaft size (1 inch most likely) I will be able to size everything accordingly.</DIV><DIV> </DIV><DIV>Brian <BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: personal_submersibles@psubs.org<BR>Subject: Re: [PSUBS-MAILIST] Brushless Thrusters<BR>Date: Sun, 7 Sep 2014 07:07:20 -0700<BR><BR></DIV><TABLE border="0" cellspacing="0" cellpadding="0"><TBODY><TR><TD valign="top"><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></TD></TR></TBODY></TABLE> <DIV>
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Alan via Personal_Submersibles <personal_submersibles@psubs.org>; <BR>
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Personal Submersibles General Discussion <personal_submersibles@psubs.org>; <BR>
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Re: [PSUBS-MAILIST] Brushless Thrusters <BR>
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<TD valign="top"><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><BR>Sent from my iPad</DIV><DIV><DIV><BR>On 7/09/2014, at 7:22 pm, hank pronk via Personal_Submersibles <<A>personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><TABLE border="0" cellspacing="0" cellpadding="0"><TBODY><TR><TD valign="top" rowspan="1" colspan="1"><DIV>Allan<BR>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>Hank</DIV></TD></TR></TBODY></TABLE> <DIV>
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Alan via Personal_Submersibles <<A>personal_submersibles@psubs.org</A>>; <BR>
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[PSUBS-MAILIST] Brushless Thrusters <BR>
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Sun, Sep 7, 2014 11:58:56 AM <BR>
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<TABLE border="0" cellspacing="0" cellpadding="0"><TBODY><TR><TD valign="top" rowspan="1" colspan="1">Hi people,<BR>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>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> I was looking at the option of making my own thruster, however the motor would require a thrust bearing & I don't<BR>know of any that would have one other than
maybe a high powered battery operated drill.<BR>Any thoughts, suggestions thanks.<BR>Alan<BR><BR>Sent from my
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