Martin Thompson Posted August 22, 2007 Share Posted August 22, 2007 I normally fly I.C , but fancied a glider , so I bought a Nebula (right or wrong , I don't know).Although I'm happy with the way that it flies , but I'm dissapointed with the climb rate and power duration.I have been told that I can convert to a brushless motor , but I have no idea where to start! What size motor? Which speed controller?I have a very tight budget , so can I change the motor/speed controller and change the batteries at a later date?If so , what batteries would I need and what are the costs involved , including chargers?Any information would be most welcome , perhaps if anyone out there has already done this conversion ,or similar , what is your set up? Are you happy with it? Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 22, 2007 Share Posted August 22, 2007 Martin, there are several threads on here which deal with several similar situations. Check out this one for instance. The tornado motor mentioned here is an ideal replacement, although cheaper outrunner style motors which would also suffice abound aplenty in places like BRC hobbies. A good electric specialist such as Brian Collins above, or John Emms at Puffin models would give you excellent advice to avoid a costly mistake. You MUST change the controller ( ESC ) if you go to a brushless motor, but you should be able to retain the batteries, however the biggest gain is probably going to be in changing the batteries for LiPo and this could be done without changinbg either the motor or ESC. 3S LiPO at around 2000m/a capacity would give BIG performance boost due to higher voltage/amps/watts, and better power to weight ratio.Some online retailers are doing superb prices on 3s LiPos at the moment. HTHPS if your budget is really tight, then keep the brushed motor and speed controller, and just use 3s LiPo . Remember however ...you must use ONLY a proper LiPo battery charger...again plenty of good budget units about.http://www.modelflying.co.uk/forum/forummessages/mps/utn/98/v/7/cp/1/ Quote Link to comment Share on other sites More sharing options...
Martin Thompson Posted August 22, 2007 Author Share Posted August 22, 2007 Thank you Timbo , most interesting , I like the idea of just changeing the batteries!! Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 22, 2007 Share Posted August 22, 2007 Well, you can do this by all means, but just be aware that the "old" brushed 600 can motor will probably have a shorter life, and it may be prudent to drop a size in propeller ( pitch or diameter ) to reduce the current slightly. You should be OK up to around 20Amp maximum, but of course....without a "whattmeter" or similar, it is hard to say what the current will be.Perhaps as you are using it on a glider, and short sharp bursts of power are the order of the day...it will be fine. Quote Link to comment Share on other sites More sharing options...
david robinson Posted October 18, 2008 Share Posted October 18, 2008 Hi Martin I have flown a nebula for sometime now using both a 125watt and 200 watt motors. Obviously the E.S.C has to be changed but an eight cell Ni cad or Mih will power both nicely. The 200 watt gives faster climb rather ike a homesick angel. You will have to move the batteries as far forward as possible to correct the c.g but otherwise no problems Quote Link to comment Share on other sites More sharing options...
Pete B Posted October 19, 2008 Share Posted October 19, 2008 Hi Martin,Missed this first time round but this thread may be of some help. My Nebula is still flying despite a brief encounter with a telegraph pole.........Pete Quote Link to comment Share on other sites More sharing options...
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