<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div id="yiv7646271124"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt; background-color: rgb(255, 255, 255);"><div id="yiv7646271124yui_3_13_0_rc_1_1_1381888951465_3254">Since my Navy "A" school is some 30+ years ago, I need a little help in trying to understand and match up something close to Georges motors. What I dont understand is why is there such an array of DC motors in the 1 - 3 hp range with wildly varing input voltages?</div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_18"> </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_19">If you notice those Tecnadyne thrusters have stupendous input voltages up to 330vdc. I dont understand why and need a primer on DC
systems for this application. Can anyone point me to one?</div><div id="yiv7646271124yui_3_13_0_rc_1_1_1381888951465_3278"> </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_7">What I'm trying to do is to slim down the housing, get more bollard thrust from the prop by adding a real kort nozzle, and use a mag coupling instead of a shaft seal, all else remaining essentially the same.</div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_9"> </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_10">I
want to slim down Georges T-Rex cans with similar power specs, but new and improved components, keeping the items conducive to homebuilding, like the housings and mountings, electrical penetrators, shaft seals if I cant do mag couplings. </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_15"> </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_16">What I've found so far <a id="yiv7646271124yui_3_13_0_rc_1_1_1381888951465_3384" href="http://www.baldor.com/support/literature_load.asp?LitNumber=FL1210" rel="nofollow" target="_blank">http://www.baldor.com/support/literature_load.asp?LitNumber=FL1210</a> fractional hp and up to 3 hp @ 1800 rpm but, here again @ 320vdc !?</div><div> </div><div>Whats attractive about this one is the dimensions, 6.5" on the mounting flange would fit quite nicely in the 6 nom SCH40 pipe which is 6.625"</div><div> </div><div>But I dont know what im doing with regard to the input
voltage / output power / torque relationship and how to match this all up correctly. All Ive confirmed so far is that Georges motors were TENV (totally enclosed non-ventilated), 36vdc @ 1800 to 3600 rpm for 1/2 and 3 hp respectively.</div><div> </div><div>Joe</div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_12"> </div><div id="yiv7646271124yui_3_13_0_rc_1_7_1381888951465_13"> </div></div></div></div></div></body></html>