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Forum Index : Windmills : It finally flies!
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nweeks Newbie  Joined: 22/01/2007 Location: AustraliaPosts: 36 |
7phase conversion, Plastic chemical drum blades, 8 bridge rectifiers, hybrid windings - part 7p2s, 7p2p: 7p2s produces the higher voltages in slow winds, until the 7p2p picks up and delivers the current... Hub features adjustable blade pitch to match installation site - not that you'd want to adjust it every day... http://www.youtube.com/watch?v=qFnACAAb3Xo Nige. Nigel Weeks nweeks at karbonit dot com |
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MacGyver Guru  Joined: 12/05/2009 Location: United StatesPosts: 1329 |
nweeks In your video, it appears to "furl" in both directions. Can you explain the tail-feather motions for those of us with older eyes? . . . . . Mac Nothing difficult is ever easy! Perhaps better stated in the words of Morgan Freeman, "Where there is no struggle, there is no progress!" Copeville, Texas |
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| nweeks Newbie Joined: 22/01/2007 Location: AustraliaPosts: 36 |
That's not furling, that's turbulence in the courtyard - a very gusty day that day. 
Not sure how fast it actually went, but the unshaped blades didn't make a sound, so it can't have been too fast. The trailing edge of the blades will be sanded down hopefully this weekend, then painting, and hooking up to the dummy load for testing... The future owner of it in Launceston has already seen it, as he's keen as mustard to have it now... 
N. Nigel Weeks nweeks at karbonit dot com |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Nice build N. I think you'll be happy with the 7 phase conversions, mine was the best performing mod I ever made to a F&P. The litte wobble is a ballance issue, its at a low RPM so its not to bad, but see if you can get it sorted before you put it up on a tower. Keep us posted on how it goes. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| nweeks Newbie Joined: 22/01/2007 Location: AustraliaPosts: 36 |
Thanks Gizmo! Quite literally, I slipped the blade poles into the adjusters on the hub, rotated them to about the same pitch, and put it out in the wind - have to take the motor off and do balancing properly! :) I'm actually tempted to bolt an accelerometer on the frame, and get it to tell me the heavy side of the blades are - might even tell me how many grams to put on, and where. (The accelerometer is one my Dad uses for motor/gearbox condition monitoring - very handy) Will post up some pictures very soon! :) N. Nigel Weeks nweeks at karbonit dot com |
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| arklan Newbie Joined: 18/08/2010 Location: AustraliaPosts: 29 |
where did u get those blades from? |
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| nweeks Newbie Joined: 22/01/2007 Location: AustraliaPosts: 36 |
Cut them from a plastic chemical drum... You can get the Taper, Twist, and Curve needed for fairly good airfoils, all by simply cutting the drum correctly. I'm about to re-cut them actually, using an improved shape for greater chord at the root. The only non-recycled part in the whole unit were the 50MM yaw bearings - everything else is scrap. :) N. Nigel Weeks nweeks at karbonit dot com |
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