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Forum Index : Windmills : F&P windmill help required
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brett Newbie  Joined: 08/02/2006 Location: AustraliaPosts: 39 |
adam666: I have used the Nylon rod in many applications before and have not had any problems with strength. The back (down wind) part of the hub is pressed onto the shaft, that develops an exact copy of the spline and needs a bearing puller to remove it. The front part is threaded onto the F&P shaft thead and done up tight on the prop. Time will tell if it is strong enough, but I am of the opinion that there will be little load on this component. Brett |
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solarmike Newbie Joined: 14/11/2005 Location: CanadaPosts: 26 |
Adam,
The only benefit from using bridge rectifiers instead of diodes is that it is simpler to wire. The drawback is that if only one diode burns out in the bridge rectifier, then the rectifier will cut your current flow by 50%. If you use 3 bridge rectifiers as shown in the arrangement below than your current carrying capacity becomes double. I would bring the three phase output of the F & P stator down the tower and rectify at the base.
 I am solarmike |
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| adam666 Newbie Joined: 01/02/2006 Location: New ZealandPosts: 14 |
Hmm found some lovely SCR's for makin rectifiers out of :) CR250DP-4-2 400V 250A - and I got a dozen of em for $48 :) way overkill I know, but they're cheap! got some other low voltage high amperage experimentin to do also got couple of De Haviland jet alternators (30v 200A) I might look at rectifying soon, depending on how fast I can need to spin em :p cheers Adam "to capitalize on windy wgtn" -excuse the pun :p |
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| solarmike Newbie Joined: 14/11/2005 Location: CanadaPosts: 26 |
De Haviland jet alternators! Wow. I would like to know more about them. What RPM are they designed for? Do they have permanent magnets? How big are they? Could you takes some pictures and post them? I am Planning on building an evacuated gas solar thermal rakine turboexpander that is coupled to a high speed alternator. I am solarmike |
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| adam666 Newbie Joined: 01/02/2006 Location: New ZealandPosts: 14 |
"evacuated gas solar thermal rakine turboexpander" jeepers! thats a mouthful! not sure what rpm they run at but will take pics soon. hell, Im not even sure if they use PM or not....but they weight about 25kg each :) one needs a couple of brushes repaired, the other just needs a once over and lube. hope to lube and test one soon! cheers Adam "to capitalize on windy wgtn" -excuse the pun :p |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
OK, I give in, whats a "evacuated gas solar thermal rakine turboexpander" The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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whirlybird Newbie Joined: 08/02/2006 Location: Posts: 27 |
Google gave in as well I get the idea my leg shoud be growing longer  I am because I am.I am not always right but often I am. |
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