Wind

[bj]

  As always my mind jumps to things based on past experience.  Just the

way it is.

  Not to be-labour that point, On the fairly large dual rotor machines,

which put out lots, but are, as it seems to me, prone to heat buildup,

could you not, cast a small hole in between the coils,preferably with

something you can remove after casting, that would allow air transfer

between the I.D., and the O.D.?  A small set of blades on the

outside, or inside, would provide the flow.  Or maybe just some creative

ducting.  Not a big difference, but most of the bigger machines are

close to being Indestructable, except when MURPHY comes to visit.

   Could this reduce the MURPHY effect.

   (refer to murphy's law)

  Just a thought,maybe errant.

    bj

[Titantornado]

I guess if you got the room to, sure.  Personally, I don't.  My coils are butted together tightly.  I'll rely on high concentrations of aluminum trihydrate in vinyl ester, and the disc brake rotor vents to move air around.

[Flux]

This idea of leaving holes in the coils keeps cropping up. It may help, but the extra cooling area is small even if you can cause air to flow through the hole. This is not so easy with low speeds and is useless unless you have holes for the air to get into the centre. Even with holes in the magnet discs you have a prop obscuring the front disc. You would need to get air to flow from holes in the back disc, somehow divert it through your stator holes  and out the front side of the stator.

I am not convinced that there will be significant gain. I think nearly all the cooling comes from the part of the stator outside the magnet discs and that is the bit where you may stand a chance of removing most heat. Even there I don't think there is the air flow that many imagine.

I suppose every little helps but burn out is either from trying to squeeze more power out than is reasonably possible or more usually from not furling soon enough or in my guess many machines never furling.

Flux

[bj]

    Thanks Flux, again, just a thought, when sleep wasn't possible.

    Trying to think of ways to make the next step better.

    bj

[Ding123]

How ya doin ,BJ? I have already tried the 'holes in the coil" thing.It seems to help

I didn't have a problem with heat. The only thing is the snow and ice . Flux told me

last year the ice and snow would build up in the stator and it does to a certain extent. Remember..while you're thinking of it ,someone has already got it half done!