[PSUBS-MAILIST] Brushless Thrusters

[Alan via Personal_Submersibles]

Thanks Hank,
in hindsight, the thrust bearing would have to be in the planetary gearbox.
This may simplify things as I could possibly mount a gearbox with thrust bearing on to
any suitable motor.  
Alan
Sent from my iPad

> On 7/09/2014, at 9:07 pm, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Alan
> 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. 
> Hank
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>; with 
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>; 
> Subject: Re: [PSUBS-MAILIST] Brushless Thrusters 
> Sent: Sun, Sep 7, 2014 1:43:49 PM 
> 
> Hi Hank,
> the kort nozzle on the Indonesian thruster looks a bit Naff. 
> ( I am designing an art work here.)
> I could get a price for the unit without kort nozzle, but
> I'm wondering if I could build something for 1/2 that price.
> There are some reasonably priced brushless motors about.
> I don't know that I could just retro fit a thrust bearing inside the can of the motor.
> I tried to put a thrust bearing for reverse inside my brushed thrusters, but
> couldn't find one with a thin enough section to fit.
> Also the motors are a bit expensive to just buy & hope you can fit one.
> How did you fit the thrust bearing on Gamma?  Did the propellor shaft extend out the back
> of the motor?
> Alan
> 
> 
> Sent from my iPad
> 
>> On 7/09/2014, at 7:22 pm, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Allan
>> 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?
>> Hank
>> 
>> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>; 
>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>; 
>> Subject: [PSUBS-MAILIST] Brushless Thrusters 
>> Sent: Sun, Sep 7, 2014 11:58:56 AM 
>> 
>> Hi people,
>> 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.
>> 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)
>>   I was looking at the option of making my own thruster, however the motor would require a thrust bearing & I don't
>> know of any that would have one other than maybe a high powered battery operated drill.
>> Any thoughts, suggestions thanks.
>> Alan
>> 
>> Sent from my iPad
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20140907/536b4b34/attachment-0001.html>