Our beach sand is the consistency of flour and so is the launch area behind the beach.
Sand would cause extra wear on all of your equipment including the wing. Just be careful not to stir up more sand than necessary by doing foot drags and such. As long as there aren’t iron particles in the sand it shouldn’t accumulate inside the motor. You could blow it out with compressed air occasionally if you are concerned be people launch on beaches all the time.
A few sprinkles of rain won’t hurt anything if the battery is disconnected. You should never fly in rain so your battery should never be connected during rain. But why would you ever expose your machine to the rain in the first place? It comes apart to fit in a car so there’s no reason to ever leave it in the rain.
To not create a new topic I’ll ask here.
Anyone out there who opened a large brushless motor? How did you unscrew those tiny allen head bolts? I allready tried heat. They won’t move. The tiny wrench even sliped a quarter turn inside of a bolt so it’s kind of ruined… Any motor guys out there?
Those are, probably, screwed on loctite fixture. Try heating it with heat gun
Yes and not any locktite and not any amount, red one (the devil) and bolts soaked in it like ther’s no tomorow, when you might want to change a bearing or something. 
I’ve managed to unscrew the tiny ones, 1.5mm allan key! Wonder why not smaller 
That key starts to rotate in the screw at a push of a finger. Heated them up, although I know red locktite needs 250C to release and on the other side of the bolts are the magnets advertised to 180C…great! After heating, when I gently tapped an Torx key into the damaged imbus probably a magnet came loose because now ther’s friction and motor jams into something when rotating…wonderfull!
Now I realy have to open it if I want to try to use it.
I was hoping that after the side bolts the front plate with the centrifugal blades and metal mesh will come off and I can take out the mesh without opening the motor further, bun it doesn’t.
So, further, there were the four front bolts, bigger allan key and deeper hole, made it possible to take them out but look at the amount of red locktite! I mean wtf, is that insane on what?
Now I’m struggling with the four bolts at the rear. The heat dissipation is so big that I heat the bolt with a small torch for like three minutes and the suroundings are just warm…of course the allan key rotated into the bolts hole. So I’ve tried something with more grip and leverage/distance from the center, spanner bits, after drilling two holes into each bolt. Heated up, broke one bit, nothing. Drilled deeper to reach the threads and inject pure acetone that melts abs plastic and red locktite (tested) and will try again with heat but I’m runing out of ideas on how to get them out.
Hi Marius, what happened that made you have to take the engine apart? Of course, you have to now because the magnet broke, but what happened before that?
Hi Radek, it worked nice, had 12 flights on it with an 130 prop, but it got kind of hot (120C on the coils) at about 4.7Kw and 200m slow 0.8ms climb.
Now I’ve put back the bigger MAD M50 motor (like the SP140) but I would go with this small MAD V135L being 2kg lighter.
So this motor worked nice for me as a lighter pilot at 3.6kw level flight and 4.7kw slow climbs but I wanted to drop the temp a bit just to feel better.
I’ve read that a metal mesh can block 18-60% of the airflow and this one has two. But if I knew this would happen I would have tried to cut it somehow without opening the motor.
And I can’t take those bolts out even after acetone, heat and tapping to unscrew them…
