<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4391">Hi Hugh,</span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4121">they rate them in kv, (revs per volt) & the one I have is 236.</span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4396"><a href="http://www.hobbyking.com/hobbyking/store/__18126__Turnigy_Aerodrive_SK3_5065_236kv_Brushless_Outrunner_Motor.html" id="yui_3_16_0_1_1414722507955_4395">Turnigy Aerodrive SK3 - 5065-236kv Brushless Outrunner Motor</a><br></span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4390">It says maximum voltage of 37 but at the kv rate it would get to </span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4392">3000 rpm at 12V.(I think.) However I'm not sure what happens with a load on yet.</span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span id="yui_3_16_0_1_1414722507955_4540">I need to spend a lot more time studying / experimenting, with this.</span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span>Alan</span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span><br></span></div><div id="yui_3_16_0_1_1414722507955_4118" dir="ltr"><span><br></span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414722507955_4166"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1414722507955_4165"> <div dir="ltr" id="yui_3_16_0_1_1414722507955_4164"> <hr size="1" id="yui_3_16_0_1_1414722507955_4163"> <font size="2" face="Arial" id="yui_3_16_0_1_1414722507955_4389"> <b><span style="font-weight:bold;">From:</span></b> Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> 'Personal Submersibles General Discussion' <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, October 31, 2014 1:28 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Alan needs a motor<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1414722507955_4289"><br><div id="yiv0441540803"><style>#yiv0441540803 #yiv0441540803 --
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#yiv0441540803 </style><div id="yui_3_16_0_1_1414722507955_4288"><div class="yiv0441540803WordSection1" id="yui_3_16_0_1_1414722507955_4287"><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4306"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1414722507955_4307">No what revs is the small motor you found. You said it was very high.</span></div><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4305"><span style="font-size:11.0pt;"> </span></div><div id="yui_3_16_0_1_1414722507955_4304"><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4303"><span style="font-size:11.0pt;">Hugh</span><span lang="EN-NZ" style="font-size:11.0pt;"></span></div></div><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4302"><span style="font-size:11.0pt;"> </span></div><div class="qtdSeparateBR"><br><br></div><div class="yiv0441540803yqt5960749747" id="yiv0441540803yqt97870"><div id="yui_3_16_0_1_1414722507955_4301"><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;" id="yui_3_16_0_1_1414722507955_4300"><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4299"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;" id="yui_3_16_0_1_1414722507955_4298"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br clear="none"><b>Sent:</b> Friday, 31 October 2014 1:07 p.m.<br clear="none"><b>To:</b> Personal Submersibles General Discussion<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Alan needs a motor</span></div></div></div><div class="yiv0441540803MsoNormal" id="yui_3_16_0_1_1414722507955_4297"> </div><div id="yui_3_16_0_1_1414722507955_4286"><div id="yiv0441540803yui_3_16_0_1_1414711859269_12747"><div class="yiv0441540803MsoNormal" style="background:white;" id="yui_3_16_0_1_1414722507955_4296"><span style="font-family:helveticaneue;color:black;">Hi Hugh,</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12749"><div class="yiv0441540803MsoNormal" style="background:white;" id="yui_3_16_0_1_1414722507955_4295"><span style="font-family:helveticaneue;color:black;" id="yui_3_16_0_1_1414722507955_4294">I'm looking for something under 3000rpm straight from the motor</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12751"><div class="yiv0441540803MsoNormal" style="background:white;" id="yui_3_16_0_1_1414722507955_4293"><span style="font-family:helveticaneue;color:black;" id="yui_3_16_0_1_1414722507955_4292">without a gear box.</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12753"><div class="yiv0441540803MsoNormal" style="background:white;" id="yui_3_16_0_1_1414722507955_4291"><span style="font-family:helveticaneue;color:black;" id="yui_3_16_0_1_1414722507955_4290">Why 3000rpm? Mainly because that seems to be the maximum that the professional</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12755"><div class="yiv0441540803MsoNormal" style="background:white;" id="yui_3_16_0_1_1414722507955_4285"><span style="font-family:helveticaneue;color:black;" id="yui_3_16_0_1_1414722507955_4284">thruster manufacturers go to; also some other reading I have done indicated that</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12755"><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">that was at the high end.</span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12755"><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Alan</span></div></div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_12760"><div id="yiv0441540803yui_3_16_0_1_1414711859269_12759"><div id="yiv0441540803yui_3_16_0_1_1414711859269_12758"><div align="center" class="yiv0441540803MsoNormal" style="text-align:center;background:white;"><span style="font-family:helveticaneue;color:black;"></span><hr align="center" size="1" width="100%"></div><div class="yiv0441540803MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Hugh Fulton via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> 'Personal Submersibles General Discussion' <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Friday, October 31, 2014 1:00 PM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Alan needs a motor</span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div><div id="yiv0441540803"><div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:helveticaneue;color:black;">Alan</span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:helveticaneue;color:black;">What revs?</span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:helveticaneue;color:black;">Hugh</span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span lang="EN-NZ" style="font-size:11.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:11.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div><div><div class="yiv0441540803MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div></div><div id="yiv0441540803yqt83655"><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;"><div><div class="yiv0441540803MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;">From:</span></b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> Personal_Submersibles [<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br clear="none"><b>Sent:</b> Friday, 31 October 2014 12:40 p.m.<br clear="none"><b>To:</b> Personal Submersibles General Discussion<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Alan needs a motor</span><span style="font-family:helveticaneue;color:black;"></span></div></div></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div></div><div><div id="yiv0441540803yui_3_16_0_1_1414711859269_2965"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Hi Brian,</span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_2965"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">thanks. That one is 15hp & 8" diameter.</span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_2965"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">The motor I do have is 2hp & 2" diameter but just revs</span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_2965"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">too fast. Hopefully I will find a solution that doesn't need a gear box.</span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_2965"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Alan</span></div></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3087"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3086"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3085"><div align="center" class="yiv0441540803MsoNormal" style="text-align:center;background:white;"><span style="font-family:helveticaneue;color:black;"></span><hr align="center" size="1" width="100%"></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;">From:</span></b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> Brian Cox via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Friday, October 31, 2014 12:25 PM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Alan needs a motor</span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3089"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div></div><div id="yiv0441540803"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3092"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3091"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3090"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;">What about this one?</span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3109"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3108"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"><a rel="nofollow" shape="rect" target="_blank" href="http://www.thunderstruck-ev.com/motenergy-me0909.html">http://www.thunderstruck-ev.com/motenergy-me0909.html</a></span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3106"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3105"><div style="margin-bottom:12.0pt;"><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;">brian<br clear="none"><br clear="none">--- <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br clear="none"><br clear="none">From: Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">To: Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">Subject: Re: [PSUBS-MAILIST] Alan needs a motor<br clear="none">Date: Thu, 30 Oct 2014 20:22:42 +0000 (UTC)</span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div><div style="margin-bottom:12.0pt;"><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> </span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div id="yiv0441540803yqt12348"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3102"><div id="yiv0441540803yui_3_16_0_1_1414711859269_3104"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Thanks Hank & Graham.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">I am probably searching for Nirvana here.</span></div></div></div><div id="yiv0441540803yui_3_16_0_1_1414711859269_3101"><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">First I am set on finding a brushless motor solution.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">I spent multiple hours of Googling, focusing on E-bikes, scooters etc.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">The E-bikes are mainly hub motors that are narrow with a large diameter, which</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">is no good as far as drag is concerned, plus you need a big prop to get out beyond</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">the diameter of the motor. There are units with 5-1 gear box ratios at 48V 1500W</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">but they can weigh around 14kg. I bought an 1850W Hobby King BLDC outrunner</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">motor for $56- & it weighs 530 grams. So more powerful & 1/27th the weight.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">This does 236 rpm per volt, & from what I've read you don't want to be turning your</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">prop at more than 3000rpm on a sub. This means I would have to drive this motor with </span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">a maximum of 12V & it's rated for a maximum of 37.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">To disipate the heat from the stationary inner coil of an outrunner, I may be forced to</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">go with oil compensation; which is what most commercial brushless thrusters are anyway.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">One solution I can see is to go with a much larger hobby type motor & run it way below</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">it's maximum voltage to keep the revs down. Also I wouldn't be thrashing the motor</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">which may help it live a lot longer.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Need to do a lot more study here, then experimentation with motors & props in water.</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">Alan</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">P.S. Hank I was given a motorized Golf trundler & converted it to a trike with ape hangers</span></div></div></div><div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;">and pink banana seat for my girls. Boy did they love showing off on that.</span></div></div></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><span style="font-family:helveticaneue;color:black;"> </span></div></div><div><div><div><div align="center" class="yiv0441540803MsoNormal" style="text-align:center;background:white;"><span style="font-family:helveticaneue;color:black;"></span><hr align="center" size="1" width="100%"></div><div><div class="yiv0441540803MsoNormal" style="background:white;"><b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;">From:</span></b><span style="font-size:10.0pt;font-family:helveticaneue;color:black;"> hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br clear="none"><b>Sent:</b> Friday, October 31, 2014 1:32 AM<br clear="none"><b>Subject:</b> [PSUBS-MAILIST] Alan needs a motor</span><span style="font-family:helveticaneue;color:black;"></span></div></div></div><div><div style="margin-bottom:12.0pt;"><div class="yiv0441540803MsoNormal" style="margin-bottom:12.0pt;background:white;"><span style="font-family:helveticaneue;color:black;"><br clear="none">Alan,<br clear="none">I just went on ebay and found a 1,000 watt 48v brushless motor with controller for 200 dollars. It is for an electric bike. I bought one for my son a few years back and it was amazing. He was driving it all over town and towing his buddy on his skate board. 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