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91
Wind / reports KD 648 and KD 484 available
« Last post by Adriaan Kragten on December 08, 2017, 05:33:42 AM »
The title of KD 648 is: "Ideas about a 38-pole permanent magnet generator for the VIRYA-3B3 windmill using the housing of a 6-pole, 3-phase, 1.5 kW asynchronous motor frame size 100 and 57 neodymium magnets size 40 * 7 * 3 mm". The 38-pole generator is an alternative for the original 4-pole generator of the VIRYA-3B3. The magnets costs of the 38-pole generator are relatively low.

To give an impression of the rotor of the VIRYA-3B3, the design report of the rotor, KD 484, which was already made in 2012, is also made public. The title of KD 484 is: "Calculations executed for the 3-bladed rotor of the VIRYA-3B3 (lambda design = 6.5, wooden blades)". The blades of the VIRYA-3B3 have a constant chord and a constant blade angle and can therefore be manufactured rather easily from a wooden plank.

A picture says more than thousands words, so I have added a picture of the VIRYA-3B3 rotor as attachment.
92
Wind / Re: Jacobs generator - low/no voltage
« Last post by DamonHD on December 08, 2017, 01:53:17 AM »
\o/

Well done!

Damon
93
Heating / Re: Phase Change [heating with solar]
« Last post by george65 on December 07, 2017, 10:54:16 PM »

How are the heaters going? have you measured the in/ out temps to see what effect they are having?
I'd like to know about how many you are running in what size area etc and your thoughts on them.  Why don't you  put the lights on a timer or sensor.
I got in trouble for not having the Xmas lights on when the Mrs came home. Got one of those day/ night sensors, put it in a little box spliced in the middle of a lead and as soon as it starts to get dark, on they come. I remember to put them on without fail now!

Pleased to say between the Daughter and the nephew who volunteer himself to look after the watering, it all survived... even some of the trays with seedlings he filled and were swamped.

Tomatoes are not going great. OK, but not great. The ones in the 2nd bed are growing at a very slow rate for some reason. Bit baffled but I'm thinking that the trees are robbing the soil of all nutrition and goodness.  Already given one of them the sword, now I'm eyeing off some nearby hedge type plants  wondering about them?  Just weird 2 garden beds 2 feet away from one another are producing such different results. I'll load on some more powered manure and epsom salts and see how that goes.  Put some carrots in the same bed so see how they fare as well.

My potted tomato I bought from the other place seems to be dying for reasons I can't figure.  Got a heap of plants ATM but I'm disappointed I'm loosing that one. All the half grown fruit is ripening so I'll have some for the early Christmas lunch this weekend.
beetroot has got huge. Looking forward to enjoying that as well!
94
Wind / Re: Once again in 3-part (phase) harmony
« Last post by MattM on December 07, 2017, 07:57:52 PM »
If you double them up by stacking one upside down, you should be able to add plates to tie each pair of U-bolts together.  That should make welding unnecessary as welding on galvanized steel is foolish.  Anyone that suggests it's okay is not aware how toxic the fumes can be and probably never tried it.  Listen to Mary's warnings and please do not weld galvanized.  I know a fellow that did it unaware and died miserably a few weeks later leaving behind his young children, one with special needs.
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Wind / Re: Jacobs generator - low/no voltage
« Last post by SparWeb on December 07, 2017, 07:49:25 PM »
Congratulations!

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Wind / Re: Once again in 3-part (phase) harmony
« Last post by SparWeb on December 07, 2017, 07:47:23 PM »
While you were up there, did you happen to check that all the fasteners were tight?
U-bolts (as you probably know) are very flexible fasteners, which allow motion before they take up any load.
Did you use self-locking nuts?  Given your other work, probably so, but I thought I'd ask...

What kind of collar do you have on the tube - presumably the collar was supplied with the plate?
I have a DMX tower which is a similar design, but I had to make my own collar for the extension tube.
97
Heating / Re: Phase Change [heating with solar]
« Last post by frackers on December 07, 2017, 04:24:35 PM »
I'm now down to picking only a few tomatoes now, with the possibility that I might forget to either plug in the LED lights or re-fill the oil based heaters; I pick them green but only once they've begun to turn white on the bottoms.
Here's one of the tasty little ones.
They have a ton of taste and meat inside, I don't hurry the ripening process, merely sit it and the other 4-5 on a east-side window sill.
When my tomato plants get to that stage, I cut them off at ground level and hang them up-side-down, with the tomatoes still attached, in a warmish place and they will ripen on the vine.
They seem to be less prone to rot if ripened like that.
Any green ones left over go to make green tomato chutney with home grown apples, onions and chilli (plus a few spices).

98
Wind / Re: Once again in 3-part (phase) harmony
« Last post by Mary B on December 07, 2017, 04:10:16 PM »
Many double up the Rohn 25 rotor shelves and drill holes and weld them together(Use LOTS of ventilation so you don't breathe in galvanizing fumes!). Then re-galvanize the assembly. Takes all the flex out of the shelf. I did that when I had a 10 foot dish on a rohn 25 tower stub 6' tall.
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Wind / Re: Jacobs generator - low/no voltage
« Last post by jenkinswt on December 07, 2017, 04:04:26 PM »
I didn't have the field wire wired in, I temporarily wired it up to the positive wire with a fuse in between it, then it came right to life!  I'm planning to move all my electronics at some point and will clean it up some inside a box. I sure don't get much sleep staring at the mill or the screen seeing the power. ;D

Now I need to convince my wife that we need 1 or 2 more!

100
Wind / Re: Once again in 3-part (phase) harmony
« Last post by JW on December 07, 2017, 03:38:48 PM »
We have updated the server and now can attach pictures from a phone or tablet, image files can be much larger that they used to be.
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