I have 6x RC Timer BC2836-9 880KV Outrunner Brushless Motors on my Y6 Arducopter.
The x mounts that are supplied with these motors are made of cheese . Please does anyone know where I can purchase decent X mounts for these motors made from "real" aluminium ??
I threw mine away and just bolted straight to the aluminium boom. had a few good crashes with no damage, but the last big crash from 55m high into a tree branch managed to rip one screw through the bar and twist the base plate so the motor is a write off (but would have happened with any mount i think)
i have also cut some out of carbon fibre in readyness for converting my quad into an octoquad.
Someone like this may be able to make them for you --> http://diydrones.com/forum/topics/cnc-cut-service
How much viabration did that make, bolting straight onto the booms ?
the first time i did it i used thin c section aluminium and the vibes were really really bad! the aluminium twisted easily and was no good.
I have changed to box section now and it is super ridgid. having said that i also use springs and foam to dampen all the electronics (not just the apm)
I also changed to square aluminum tubing after a crash that twisted and bent all of my c section booms. I noticed that you screwed your motors directly into the boom. This will transfer all the vibrations from the motors to the booms and into your main frame. Try this here with the X-mounts that come with your motors. Even if the mounts are soft, if you put neoprene rubber washers from Home Depot here between your mounts and the booms, then you don't need to overtighten the bolts. Less vibrations, stronger mounts.
The motor mounts that come with the RC Timer motors are a bit soft, but if you mount them in this way here it should be fine. You can't see it on the video, but I put neoprene rubber washers from Home Depot here between the frame and the X-mount. With four bolts, loctite washers and nuts, you shouldn't have to overtighten to get a solid grip on the motor mount. Also, besides dampening vibrations, the neoprene washers absorb some of the tension from the bolts so that the X-mounts don't bend. They also provide grip to prevent slipping. So far, I have noticed a considerable improvement on the noise of the motors and the reduction of vibrations evident on my on board cameras.
PS. If you can find X mounts made of harder stuff, that's great, but make sure they fit the holes in the motor. I have used both the softer X Mounts and the harder ones and am happy with both.