disco stu wrote:I'm pretty sure it was the 2836 1000kv I got also. Thanks for the info guys
One thing I noticed was that mine came with a metal plate infront of the motor on the outside of the firewall, is that the way they all came or is it a newer addition? I had the thought that some aluminium can around the motor might help dissipate some of the heat produced there
Yeah, mine has that plate too, I think they've always come with that, not sure though.
From what people have said, the 2836 motor works real good; also being a bit thinner it leaves more room for air to get around the motor or alternatively, to fit some glass reinforcement on the inside as well as outside of the nose.
One pic from the RcGroups thread showing glass reinforcing on the outside. The plastic fuse there doesn't like getting hot and can soften up. Notice though that at the cost of some drag it would be possible to put some slots near the rim of the nose to let air in. I think the existing slots at the side of the motor probably don't do much.
So, the main problem is getting some airflow over the motor, no matter what you use.
Another idea I had would be to fit a tiny coke-can impeller behind the spinner that would pump in air and drive it through three or so slots over the motor, then vent it out through a wide faired slot at the back of the canopy and/or drill a hole in the end of the fuse under the tailplane. The impeller would only work when the motor was going and be shielded by the spinner when not, so as to reduce drag. Not sure if the motor shaft is long enough to fit one though.
Whatever, it's fun coming up with ways to change things... and anyway, as Shotgun says, the motor is really only there to get you up for gliding, or get you out of the poo if you are slope soaring and get caught in a downdraught "rotor" or something. But it would be cheeky to cool the insides so you could go balls to the wall.