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Forum Index : Site News : 11th March 2007. Added another web page.
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Well it was hot this weekend! No winds at all, very still and hot. So I spent most of the weekend in doors in the shade. Added a new page to the web site about converting a cheap sensor light to 12v operation, link here. I also did some work on the cnc router. Trev and I are working on a new blade, so I drew up a NACA2410 profile in CAD and used the router to cut a couple of ribs, as a test run. 
And here is a ziped up movie of the router in action. 1.8M download. 2007-03-11_202441_NACA2410.zip I set the router to make one pass at almost full depth, the foam was 25mm thick so the cut depth was 24mm. This left 1mm at the bottom of the rout to keep the piece attached to the parent material. It all worked out well, now I just need to cut about 100 more of them, all different sizes. The profile is a NACA2410, a low drag high lift profile used by large wind turbines. While it would be hard to make by hand, using the router means I get get the profile spot on. When finished routing, all the ribs will be slipped over a length of dowel or steel tube ( thats what the hole in the middle is for ) and then the angles set before glueing, but thats Trevs department. The finished blade will then be used to make a mould. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| brucedownunder2 Guru  Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hi Glenn. Excellant work there. So , 100 of those all slightly different lengths and profiles attached to the dowel and twisted on it to get the twist Etc. Then Trev will use that as a "plug " to make 2 X half moulds and lay up the glass matting Etc in this mould . What will be inserted into the mould ? liquid foam ? .I guess this will give it the strength internally. Looking forward to the finished product, Thanks to both of you for such excellant work ,and the work description. Bruce Bushboy |
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Trev Guru Joined: 15/07/2006 Location: AustraliaPosts: 640 |
No foam in these blades Bruce, these will be hollow. We will make the two halves in F/g and join them together. How's it going Glenn, How many have you done now?? Trev @ drivebynature.com |
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