Stephen farrar Posted June 14, 2018 Share Posted June 14, 2018 Hi, just installed a new replacement motor in my wing wing. Tested without propellor and all worked fine. But, when I put on the propellor and gave it full throttle the motor stopped and made a screaming noise. No burning smell or smoke. Removed propellor, gave it full throttle and all is okay. Tried with propellor, 5 x 5, engine stops at full throttle with screaming noise again, tried without prop and all okay, tried with 6 x 5 propellor, screaming noise at full throttle again with engine stop. Anybody any ideas as I'm stumped. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted June 14, 2018 Share Posted June 14, 2018 Timing Stephen. Check the paperwork for setting the timing Or The outer casing could be spinning on the shaft under load There is often an Allen screw to tighten Edited By Denis Watkins on 14/06/2018 15:18:59 Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted June 14, 2018 Share Posted June 14, 2018 If it's screaming, it sounds like the motor is spinning at high revs, but the prop isn't. Check that the prop adapter is gripping the motor shaft. Quote Link to comment Share on other sites More sharing options...
Stephen farrar Posted June 14, 2018 Author Share Posted June 14, 2018 Hi Denis, thanks for the quick reply. Unfortunately I'm not sure what you mean. I only replaced the motor like for like and the new motor did not come with any paperwork. Quote Link to comment Share on other sites More sharing options...
Stephen farrar Posted June 14, 2018 Author Share Posted June 14, 2018 Hi Gary, prop retained with one of those prop saver rings and it is gripping ok. Motor doesn't scream when no prop is on and that would be at its highest revs I presume. Quote Link to comment Share on other sites More sharing options...
Graham R Posted June 14, 2018 Share Posted June 14, 2018 Thought I read somewhere that you shouldn’t run up a brushless without a prop on it. Quote Link to comment Share on other sites More sharing options...
Stephen farrar Posted June 14, 2018 Author Share Posted June 14, 2018 Hi Denis, The motor isn't spinning at all when the screaming noise starts, it stops completely. Quote Link to comment Share on other sites More sharing options...
Stephen farrar Posted June 14, 2018 Author Share Posted June 14, 2018 Hi Graham, not seen that myself but it runs okay at full revs without the prop, not with, the motor completely stops when prop attached. Quote Link to comment Share on other sites More sharing options...
Kim Taylor Posted June 14, 2018 Share Posted June 14, 2018 Posted by Stephen farrar on 14/06/2018 15:45:11: Hi Denis, The motor isn't spinning at all when the screaming noise starts, it stops completely. Single phased, perhaps, or a burned out or dodgy winding. Check the motor - esc connections to make sure they're sound. Kim Quote Link to comment Share on other sites More sharing options...
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