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10ft Other Power build
FishH2o:
Just wanted to update you guys...
Since all of the comments, I wanted to let you all know its Yellow Pine. Yes it is a little "green" still thats why I haven't started carving them... I wi update the photos in a few more weeks of the same pieces of wood for the blanks. Im sure in the 75-90% humidity I have here in FL they aren't going to dry much more. Eventually this will FLY on my property in New Mexico so its nothing im rushing.. However, while waiting for the wood to "condition" if you will I have ordered my magnets and wire. Resin will be purchased locally since im in Tampa.. We and a ton of boat builder supplies around here... The one thing I wanted to ask you all is if cost wasn't so much of an issue what resin have the most heat transferring properties. Also, on the outer edge of the stator disk has anyone tried to mount a heat exchanger or small flanges to help keep it cool? I know it should cool itself on top of the tower but I would think any assistance with cooling would help.
Thanks,
FishH2o
SparWeb:
--- Quote ---Im sure in the 75-90% humidity I have here in FL they aren't going to dry much more. Eventually this will FLY on my property in New Mexico...
--- End quote ---
Woah. The shape of the blades you carve in Florida will have only a passing resemblance to the shape they will have in New Mexico!
As for stator heat and shedding it: mixing aluminum particles into the resin is one way to improve heat conduction. Your selection of resin also matters and somehow the magic ingredient has slipped my mind. It's not epoxy - Epoxy resin is cheap but insulates too much. I'll try to remember, but hopefully someone with a better memory than me will get here first!
A heat sink around the edge of the stator isn't a bad idea. Tricky to do though. There's a thermal mass at the center of the generator (the magnet disks and the hub) but they aren't connected to the stator so they don't do much to cool it. If you want to think about a heat sink, make sure not to get solid metal elements between the magnet rotors, or they will just cause a drag and become a SOURCE of heat. Ironic, eh?
Mary B:
Hmmm maybe a plastic heat pipe wound into each coil ran to the outside edge. Connect to a manifold then a radiator that faces into the wind...
Amish_Fighter_Pilot:
I like your thinking Mary. Liquid cooling inside would be a huge plus, and you already have a device capable of turning the pump for it(just use an automotive water pump running off a belt drive)
FishH2o:
--- Quote ---Woah. The shape of the blades you carve in Florida will have only a passing resemblance to the shape they will have in New Mexico!
--- End quote ---
Yeah I was thinking the same thing. If they are all jacked up ill just carve some more.I work from home and I will walk outside work for 15 minutes come in and make sure im still online and see if anyone has questions then I will go back outside and work on the blades a little more. The first 2 are actually coming along pretty good. Are they the best NO but for a first timer that has never done anything like this Im prod of them so far. I seriously don't mind screwing up and starting over. Being self taught on pretty much everything I do I just try and try again..
My old Rodeo coach used to tell us bear down and TRY and keep your head on...
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