 Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me. |
Forum Index : Windmills : Roof Mount
| Author | Message | ||||
| Greg Hudson Newbie  Joined: 28/04/2009 Location: AustraliaPosts: 22 |
G'Day all. I'm not in a position to install a tower, and don't have a appropriate spot for one, however living on the side of a very steep hill, the peak of my (tin) roof is about 15m above ground level (with 180 degree almost uninterrupted views - only one tree obscures slightly). I have thought of a possible mounting solution, being a brace that 'folds' over the peak of the roof, and is screwed into the battens. A VERY short (1.5m or less) pole would have the turbine mounted on it. You may ask WHY such a short pole... After studying some aerodynamics, apparently wind is accelerated up a sloping roof, and mounting as close (low) to the peak as possible would gain the most benefit. I have drawn a simple diagram, but I'm after some feedback / other ideas from people. (Many minds make better plans?) 
I plan to isolate the 'cap' and the 'spars' from the roof itself with rubber strips to hopefully eliminate / reduce vibration. If this fails, I'll mount the pole through the roof onto the roof trusses inside the ceiling cavity. Due to the short mounting pole, I plan on NOT using any guy wires (mainly because there's nowhere to attach them to anyway). So... Any ideas anyone ? Regards, Greg. |
||||
| davef Guru  Joined: 14/05/2006 Location: New ZealandPosts: 499 |
I think you want to seriously consider the effects of any vibration that would be coupled into your house? HAWT or VAWT? |
||||
sPuDd Senior Member  Joined: 10/07/2007 Location: AustraliaPosts: 251 |
Greg, we designed a similar setup where the guys were incorporated into the mounting plate for industrial PTZ cameras. Was a very stable platform, but for a wind gen - it's going to sound like a helicopter landing on your roof. Please take note - the noise will drive you insane! Unless you intend to "enable" it only while testing, then its best to be pole mounted away from the house. sPuDd.. EDIT: The noise is not to do with the movement of the platform with respect to the roof - it all comes from the generator. No amount of padding or rubber will dampen it. The roof is a natural loud speaker, and you are living inside it. Think about the sound of the roof creaking in the summer heat, now amplify it 100 fold. It should work ...in theory |
||||
| Greg Hudson Newbie Joined: 28/04/2009 Location: AustraliaPosts: 22 |
G'Day Dave. Only as a last resort hawt or vawt. Vibration possibilities have been considered. Regards, Greg. |
||||
| Greg Hudson Newbie Joined: 28/04/2009 Location: AustraliaPosts: 22 |
I can understand the theory, and would agree if the whole roof was vibrating - yes it would be loud. However, I have a 1500 watt aircon motor up there now, and it is barely audible inside. I might examine the mount for that, and see how they eliminated vibration. There is an Air-X through roof mounting kit available (at a ridiculous price). I may well put up something similar to what they have. I saw a video on YouTube with 5 of them screaming all at once - looked impressive. See: 2009-05-23_022650_Roof_mount_kit.pdf Regards, Greg. |
||||
| sPuDd Senior Member Joined: 10/07/2007 Location: AustraliaPosts: 251 |
Greg, you could easily make the same setup. You can get Decktite roof seals at most hardware stores, the rest is plumbing or marine parts. Might we suggest you temp install your finished wind gen on the roof before you cut holes in it. At least you can test for noise first. sPuDd.. It should work ...in theory |
||||
| brucedownunder2 Guru Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
Hi Spud,, I lived on a cliff face near the beach in sydney. I used a 15 foot length of 3 inch gal pipe that was slid up inside a 3 1/2 inch pipe with a small winch . as it lowered it scraped along the cliff face and angled back to mu balcony for working on it .I rock bolted a pivoting bracket into the cliff face . The guys were strung off pulleys attached to trees ,so when it was up clear of everything ,they became tight.I put large tent springs on the ends of the guys.,with safety wires across them. The unit performed very well,being near the ocean,we used to get good wind every afternoon. I think there might be a postings and pic about it in the old forum or on fieldlines. You'll have to do a bit of searching,it was 10 years back.. Bruce. Bushboy |
||||
| Greg Hudson Newbie Joined: 28/04/2009 Location: AustraliaPosts: 22 |
This is a good plan, and one that I had intended. The only holes would be where the lower horizontal plate screws through the tin roof into the batten. However, this may change to a bolt, with a rubber washer / car engine bush on the underside of the batten itself - again, to eliminate vibration by the batten. It depends on the noise I guess. Greg |
||||
marcwolf Senior Member Joined: 08/06/2009 Location: AustraliaPosts: 119 |
I am also thinking of a roof mount. My double garage is seperate from the house and I am thinking of mounting the pole betwee the two doors, so it can be winched down easily. Noise should not be an issues unless the car's complains. Coding Coding Coding.. Keep those keyboards coding.. RAW CODE!!!!! |
||||
 Print this page |
 |
The Back Shed's forum code is written, and hosted, in Australia. | © JAQ Software 2025 |
