<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_1_1418065181117_2615"><span>Hi Brian,</span></div><div dir="ltr" id="yui_3_16_0_1_1418065181117_2614"><span id="yui_3_16_0_1_1418065181117_2613">are the motors near the middle of the sub?</span></div><div dir="ltr" id="yui_3_16_0_1_1418065181117_2617"><span id="yui_3_16_0_1_1418065181117_2624">You will be able to turn a lot easier if they are.</span></div><div dir="ltr" id="yui_3_16_0_1_1418065181117_2619"><span id="yui_3_16_0_1_1418065181117_2618">You could always make a scale model & push it at the point of the motor placement </span></div><div dir="ltr" id="yui_3_16_0_1_1418065181117_2619"><span id="yui_3_16_0_1_1418065181117_2622">& see how easily it turns.</span></div><div dir="ltr" id="yui_3_16_0_1_1418065181117_2619"><span>Alan</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_1418065181117_2849"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1418065181117_2848"> <div dir="ltr" id="yui_3_16_0_1_1418065181117_2847"> <hr size="1"> <font size="2" face="Arial" id="yui_3_16_0_1_1418065181117_2850"> <b><span style="font-weight:bold;">From:</span></b> Brian Cox 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> Tuesday, December 9, 2014 7:18 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] U joint prop<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1418065181117_2851"><br>No, I'm running shafts back along each bottom sides of the sphere. I found an area between the body of my ballast structure and the sphere where there is space to tuck in the motors nicely and still keep everything with in the profile. I still may put some rudders on if I can't turn the thing.<br><br>Brian <br><br>--- <a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org" id="yui_3_16_0_1_1418065181117_2852">personal_submersibles@psubs.org</a> wrote:<br><br>From: hank pronk via Personal_Submersibles <<a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>To: Personal Submersibles General Discussion <<a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] U joint prop<br>Date: Mon, 8 Dec 2014 08:09:44 -0800<br><br>Brian,<br>If your motors are in cans, can't you turn the can?<br>Hank<br>--------------------------------------------<br>On Mon, 12/8/14, Brian Cox via Personal_Submersibles <<a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br> Subject: Re: [PSUBS-MAILIST] U joint prop<br> To: "Personal Submersibles General Discussion" <<a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br> Received: Monday, December 8, 2014, 10:03 AM<br> <br> That's probably the reason I've never<br> seen one. I'm hoping that with two props I'll be able<br> to turn by just running one prop or the other. <br> <br> Brian<br> <br> --- <a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br> wrote:<br> <br> From: Marc de Piolenc via Personal_Submersibles <<a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br> To: <a ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br> Subject: Re: [PSUBS-MAILIST] U joint prop<br> Date: Mon, 08 Dec 2014 10:11:37 +0800<br> <br> One U-joint causes a 1/rev vibration which can be quite<br> severe. To get <br> smooth action, you need a pair of U-joints, and the input<br> and output <br> shafts need to be parallel.<br> <br> That, or you need to substitute a constant-velocity joint<br> for the U-joint.<br> <br> Marc<br> <br> On 12/8/2014 9:11 AM, Brian Cox via Personal_Submersibles<br> wrote:<br> > Has anyone ever had any experience<br> or seen a propeller that can<br> > change orientation using a U joint at the end of the<br> propeller shaft?<br> > If could just get 15 degrees or so I might be able to<br> eliminate my<br> > rudder assembly altogether.<br> > Brian<br> ><br> ><br> > _______________________________________________<br> > Personal_Submersibles mailing list<br> > <a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br> > <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br> ><br> <br> -- <br> Archivale catalog: <a href="http://www.archivale.com/catalog" target="_blank">http://www.archivale.com/catalog</a><br> Polymath weblog: <a href="http://www.archivale.com/weblog" target="_blank">http://www.archivale.com/weblog</a><br> Translations (ProZ profile): <a href="http://www.proz.com/profile/639380" target="_blank">http://www.proz.com/profile/639380</a><br> Translations (BeWords profile): <a href="http://www.bewords.com/Marc-dePiolenc" target="_blank">http://www.bewords.com/Marc-dePiolenc</a><br> Ducted fans: <a href="http://massflow.archivale.com/" target="_blank">http://massflow.archivale.com/</a><br> _______________________________________________<br> Personal_Submersibles mailing list<br> <a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br> <br> <br> _______________________________________________<br> Personal_Submersibles mailing list<br> <a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br> <br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></body></html>