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Forum Index : Windmills : small F&P

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Oscar4u

Regular Member

Joined: 23/02/2011
Location: New Zealand
Posts: 42
Posted: 08:39pm 20 Dec 2015
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Hello
a friend of mine has to have a repeater on a hill to have broadband. He has a solar panel there to power this but in winter this does not keep up. Hence I made this mill. The deal is that I do the engineering and he does the sparky bits.


I used a F&P housing and shaft to make a two track power gland. I machined up a piece of brass left over from somewhere and run Makita carbon brushes on that. From the turntable is a bit of 25mm pipe going down through the center of the tower. This will be fixed to the top of the gland with a bit of 38mm flexi hose. two wires will come down through this hose into the gland. The bottom plate on the gland, the f&p housing, the carbon brushes and springs are bolted to the tower. The bronze rings and the top of the gland rotate with the tower. There is a piece of 6"pvc that keeps it all watertight.



The bearing housing is a capped bit of 75mm pipe which I sunk two 6205 bearings into. The blade boss is bilocked onto the f&p shaft. The blades will later be replaced probably with geo 222 but that remains to be seen.






I plan to make a much larger mill with feathering blades. To try and get this right I will want to record the angle of the tail in relation to the blades. To do this I sandwiched a pot between two pieces of plastic which are mounted inside a capped piece of 65mm pipe. This 65mm pipe slides over a little piece of 50mm pipe and is fastened there with a bolt, after having made sure the fuel line slid over the pot stem. The 1/4" fuel line coming up from the tail pivot is fixed to the base so when the tail moves it will move the pot, and this movement will be recorded. I also will record the wind speed, blade rpm and blade feather angle to see if the blade feathering is working correctly. This little wind mill will not have the feathering blades but I want to have the other functions as a trial for the next one.

Hope this is all clearer then mud



I had a google but found no accurate design of pvc blades. Does anyone have a blueprint for them? Think they are not very durable but something to get us started. The far blade goes from roughly 12 o'clock to 9 o'clock. Is this how it should be or should it be rotated more? I welcome any suggestions.

Edited by Oscar4u 2015-12-22
Oscar4u - for all your rotary cowshed repairs
 
Tinker

Guru

Joined: 07/11/2007
Location: Australia
Posts: 1904
Posted: 11:40pm 20 Dec 2015
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  Oscar4u said  

I had a google but found no accurate design of pvc blades. Does anyone have a blueprint for them? Think they are not very durable but something to get us started. The far blade goes from roughly 12 o'clock to 9 o'clock. Is this how it should be or should it be rotated more? I welcome any suggestions.



Somewhere in my shed is a set of plans for PVC blades. I got them for free from its designer in the US.
I never used them and you are welcome to have these plans, just send me a private message with your address and I'll start looking where I might have stashed these plans.
Klaus
 
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