Ernie Posted December 20, 2015 Share Posted December 20, 2015 Hi Guys, I must be missing something. This must be a very common problem. I've just finished a wee glider, with an outrunner motor. Now, space is pretty tight up front, and the wires come out of the front of the outrunner, so they are passing very close to the rotating shell of the motor, with the danger of damage. What do you electric whizzes suggest? ernie Quote Link to comment Share on other sites More sharing options...
PatMc Posted December 20, 2015 Share Posted December 20, 2015 First choice is to glue or secure the wires to the fus clear of the rotating part. If that's not possible you could make a hole in the side of the nose corresponding to where the wires come out of the motor then another hole beyond the motor length to bring them back in. A small fairing covering the holes & wires would tidy things up. Quote Link to comment Share on other sites More sharing options...
Geoff S Posted December 20, 2015 Share Posted December 20, 2015 It is a problem. We don't really want the motor to commit suicide by cutting through its own wires I've always been able to tape or stick the wires to the fuselage without going to lengths Pat suggests. Fortunately, on electric conversions etc it's more usual to mount the motor the other way round and then it's not a problem at all. Geoff Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted December 20, 2015 Share Posted December 20, 2015 Ernie In an installation where there is very little room selecting a motor that has its wires coming out the back becomes an important design issue. I have a couple of planes where the outrunner motor bell is the size of the motor fairing! Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted December 20, 2015 Share Posted December 20, 2015 Is this type of situation not what Inrunners were made for...? But yes as the other chaps have said you do need to keep the wires away from the rotating can either by taping or gluing them to the fuselage side out of the way.... Quote Link to comment Share on other sites More sharing options...
Ernie Posted December 21, 2015 Author Share Posted December 21, 2015 Thanks all, It is a problem. at the risk of sounding negative, theres not much room to stick the wires to the inside of the fuz...I don't want to buy an inrunner, with all the installation problems...Its tight in there. I suppose the best way is to go out side the fuz and add a fairing. I'll go and give it a whirl ernie Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted December 21, 2015 Share Posted December 21, 2015 Is it too late to give your model a firewall behind the motor, and a removable lightweight cowl for the nose? I mounted an AXI outrunner in my scale Cub by bolting it directly to the firewall instead of using the normal X-mount, which was too wide to fit in the cowl. It does require access to the rear of the firewall though, to tighten the mounting bolts from the back -- hex socket bolts and a long ball-ended hex driver does the job for me. Quote Link to comment Share on other sites More sharing options...
gangster Posted December 21, 2015 Share Posted December 21, 2015 Is it possible to reverse the shaft on the motor you have? It sounds like the prop driver is on the shaft coming out the back. On some motors you can reverse the shaft or get a prop driver that bolts to the outrunning bit. I am sure there is a motor out there to suit your needs. Not a good plan to have the wires coming out the front Have a word with BRC hobbies Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted December 21, 2015 Share Posted December 21, 2015 Hi a canned out runner would sort your problem if you can find one . It's an out runner that runs inside a metal can giving all the torque of a out runner with the convenience of an in runner. There are not many on the market but you may be able to find something suitable. They were fitted in the Flying Legends fighters sold by Ripmax a few years ago Other option is to re configure your motor so that the shaft protrudes from the other end effectively letting the wires exit at the back out of the way of the rotating can. Wires hanging out of the side of the model should not really be an option as they are untidy and can get caught or damaged when landing. Quote Link to comment Share on other sites More sharing options...
PatMc Posted December 21, 2015 Share Posted December 21, 2015 Posted by Engine Doctor on 21/12/2015 10:07:21: Wires hanging out of the side of the model should not really be an option as they are untidy and can get caught or damaged when landing. Not as untidy as a cylinder head would be. There would be no need for them to be "hanging" even if not covered by a small fairing, as suggested. Quote Link to comment Share on other sites More sharing options...
Geoff S Posted December 21, 2015 Share Posted December 21, 2015 Posted by Engine Doctor on 21/12/2015 10:07:21: Wires hanging out of the side of the model should not really be an option as they are untidy and can get caught or damaged when landing. Not necessarily. The esc for my Limbo Dancer is mounted on the outside of the fuselage between the undercarriage legs and perfectly safe and secure. Geoff Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted December 21, 2015 Share Posted December 21, 2015 Surely there are lots of "foamies" that everything hanging out side! Whether you bury wiring (or anything else come to that) is entirely a matter of personal choice. Quote Link to comment Share on other sites More sharing options...
Dave Bran Posted December 21, 2015 Share Posted December 21, 2015 Reverse the shaft and turn the motor round? Quote Link to comment Share on other sites More sharing options...
Ernie Posted December 23, 2015 Author Share Posted December 23, 2015 Thanks all, It really is a minefield. I've done a bit of cobbling with some tape, and it doesnt seem to be touching. I'll give it a whirl next week,and think about a more permanent solution ernie Quote Link to comment Share on other sites More sharing options...
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