<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>James,</div><div>a bit more info; it is made by Golden Motors, China.</div><div><a href="https://www.goldenmotor.com/frame-bldcmotor.htm">https://www.goldenmotor.com/frame-bldcmotor.htm</a></div><div>main site...</div><div><a href="https://www.goldenmotor.com/">https://www.goldenmotor.com/</a></div><div>There is a lot more info here along with accessaries.</div><div>Not sure what freight would cost you, but the price is better & the speed</div><div>controllers would be compatible.</div><div>Alan<br><br><div>Sent from my iPad</div></div><div><br>On 16/05/2018, at 9:37 AM, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>James,</div><div id="AppleMailSignature">just thought you are probably putting it in your hull & driving a </div><div id="AppleMailSignature">pulley on the propeller shaft. So ignore the last email lol.</div><div id="AppleMailSignature">I would think you could get something a lot cheaper, but make sure</div><div id="AppleMailSignature">it has good bearings.</div><div id="AppleMailSignature">Cheers Alan</div><div id="AppleMailSignature"><br>Sent from my iPad</div><div><br>On 16/05/2018, at 9:28 AM, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>Hi James,</div><div>just had a look at the motor & it's a bit of a beast.</div><div>Looks like an in-runner. It says elsewhere it is cooled with a fan but has</div><div>the option in the check box for air or water cooling.</div><div> If you have a look at the Dragon submersible, they have gone with some</div><div>large diameter but short motors that resemble the high torque direct drive</div><div>bicycle hub motors that are popular. On the Dragon submersible it looks</div><div>like they have developed thier own propeller so that the thrust isn't hitting</div><div>the body of the thruster.</div><div>The cooling system on your motor isn't going to work if you put it in a water/</div><div>pressure proof enclosure. With the in-runner the coils are on the outside</div><div>& can dissipate their heat through the can, so there would be the option</div><div>of fitting the motor tightly in to a housing & letting the heat go through the</div><div>housing into the water; but the fins on the motor won't let that happen in</div><div>this case. Maybe grind them off. It has a temperature sensor so there is the</div><div>option of monitoring the temperature & running it at a suitable power. Some </div><div>escs can drop the power automatically if the temperature gets too high.</div><div>The motor is very expensive. There is this Maytech motor designed for electric</div><div>surfboards that is rated at 600W</div><div><a href="http://www.michobby.com/product/electric-surfboard-skateboard-e-bike-brushless-motor-8085-160kv-motor/">http://www.michobby.com/product/electric-surfboard-skateboard-e-bike-brushless-motor-8085-160kv-motor/</a></div><div>It is an 8085 160 kv out-runner & priced at $188- US. I am wanting to test </div><div>one of these but will test my smaller motors first to get a better idea of what </div><div>kv winding I should have. Maytech will wind to your specifications; I think you </div><div>have some knowledge of the RC world so you will understand this.</div><div>This motor being an out-runner has the coils on the inside & so I am relying</div><div>on oil for cooling. </div><div>You will need to replace the propeller shaft with a longer stainless shaft.</div><div>Your motor is designed to drive a pulley & you would have to check</div><div>what axial load the bearings take. In my thruster design I have my motors</div><div>suspended between two bearings in the thruster housing that take the</div><div>forward & reverse axial load.</div><div>Alien Power in England have some large brushless motors & motor controllers.</div><div>I think he's a small operator & he will respond to questions. Got an idea he's</div><div>in Birmingham.</div><div>I am focussed on my thruster testing at the moment, but could not put a </div><div>time on when I will test the 8085 motor. You can keep an eye on my progress</div><div>if you want to hold off your thruster build.</div><div>There is an electric surfboard site that are using large DC motors, that may be</div><div>of help, but these boards are doing 40kph, so are more like planning boats</div><div>rather than submarines that fall in to the work boat category.</div><div>Good luck.</div><div>Alan </div><div><br></div><div><br></div><div><br><br><div>Sent from my iPad</div></div><div><br>On 16/05/2018, at 3:51 AM, James Frankland via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><span>hi all</span><br><span></span><br><span>I am thinking about what motor I should use for my main thruster on</span><br><span>Skadoc. Its got to be big.</span><br><span></span><br><span>All these ideas are just thoughts at the moment, as I am working on</span><br><span>battery pods now.</span><br><span></span><br><span>Expecting delivery of pipe from UK today.</span><br><span></span><br><span>So I have time to think how motor configuration is going to work.</span><br><span></span><br><span>What do you guys think about this motor choice here? As a possibility.</span><br><span></span><br><span><a href="https://www.miromax.lt/en/m-6/c-39/c-45/product-500-bldc_motor_hpm-5000b_-_nominal_power_5-86kw">https://www.miromax.lt/en/m-6/c-39/c-45/product-500-bldc_motor_hpm-5000b_-_nominal_power_5-86kw</a></span><br><span></span><br><span>I have room for 12 x12v batteries, so all voltages are a possibility.</span><br><span></span><br><span>I am also thinking of running an inverter and working at 120v AC.</span><br><span>investigating this.</span><br><span></span><br><span>Regards</span><br><span>James</span><br><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>