Turbine flying high

[dbcollen]

After 2 days of hard work the turbine is flying 80 feet up.

We hoisted and set it yesterday, I got tired yesterday evening and did not get the wiring finished.

It is fairly stressfull climbing and working 80 feet up all day.

My brother and I both climbed to the top and bolted the tower stub to the tree, then hoisted the alternator / blade assembly up to us, we then had to lift it overhead and set it on the tower stub. The tail came up next and today we did the wiring.

I still have to pull 500 ft of #6 wire through the underground conduit and hook up to the rectifier and batteries.

The 3 #6 wires coming from the mill pass through a 12 foot long section of 1/2 inch plastic pipe which goes through the pole and rotates with the turbines yaw and keeps the wiring from rubbing on the 4 bolts that secure the pole to the top of the tree.

I have to go up one more time and put the ground wire on the tower stub. I will be installing a 3 phase lightning arrestor on the ac side of the  rectifier, and a DC lightning arrestor on the DC side of the rectifier.

 We took a pretty good strike to the solar this year and the several lightning arrestors did thier job very well, we only lost one cordless phone.

The forecast is calling for 15 mph wind tomorrow, so I think I will go back out and finish the wiring.

Dustin

[gotwind2]

It is a brave man that climbs an 80ft (25 Meters) tower, with what looks like little or no guy lines. (It is difficult to tell from the images).

I wish you success Dustin.

Ben.

[TomW]

Ben;

We quizzed him on IRC about the lack of guys and he says the top is 10" diameter [25 CM give or take] and he is unconcerned.

I can't see if he has a harness on or not.

I guess he is just another crazy American.

You couldn't get me up there at gunpoint these days.

TomW

[SparWeb]

"You couldn't get me up there at gunpoint these days."

What, you scared of a few little mountain pine beetles?

Just kidding.  It would scare the willies out of me, too.

[dbcollen]

We were tied in at almost all times, my brother and I have been professional arborists for a long time we had 5 different lines in the tree.

got some preliminary data.

51. volts 21hz
    
109. volts 46 hz
     
     

now to do some conversions and plot curves.

Dustin

[dbcollen]

I can't seem to wrap my brain around hz to rpm conversion, if anyone could help it would be very much appreciated.

10. foot dual rotor
    
12. mags per rotor
    
9. coils
   
   

danb's pre made standard stator 48v

don,t know # of turns as I bought it from otherpower.com

1x2x.5 n42 mags

not sure what other info to provide.

Thanks,

Dustin

[elvin1949]

Tom

  I won't climb anymore either.

I fell out of a big oak i was trimming up about 5 years ago.

  When i was young i would bounce,NOW i just go SPLAT. Damn that hurts.

later

Elvin

ps 58 now

[kurt]

cycles / seconds times 60 seconds / 1/2 the number of poles = rpm.

so 210 rpm and 460 rpm

definitely do not try to use this once you hook up the rectifiers and the battery you will only get very confusing readings.  

[dbcollen]

Thanks Kurt, I kept thinking I had it, then as I was doing the math it did not work.

[MattM]

Sounds like a similar stator to the one in Tim's Turbine page:

http://www.otherpower.com/timsturbine.html

[dbcollen]

So, the math goes.......

.24 volts per rpm

48. v system
    
48. v/1.41= 34vac
    
34. /.24= 142 rpm cut in at 48v
    
    

Cool, pretty close to 150 rpm, nice to be closer to the stall side of things.

Also very convient the conversion from hz to rpm is "times 10' for a 12 pole, almost direct reading just add a zero.

Dustin

[dlenox]

dbcullen,

My tower is 70' freestanding lattice, and I made work platforms to stand on at the top.  It would be difficult and/or tiring without them.  Myself I try to have 2 lines tying me onto the tower at all times, for the climb up I have a 3/8" steel life line and decender.

It can easily get tiring going up/down more than 2x.

Curious - how did you hoist the turbine to the top?

Congrats on getting it up!  It will be functional soon enough.

Dan

[dlenox]

dbcullen,

Just re-read your post - you guys hauled the turbine up to the top manually using ropes?  And then lifted it into place?   Ughhhhhh!

Man I would not want to get into a fight with you, must have arms like Popeye...

Dan

[dbcollen]

We had a traverse line going to a tree trunk on the uphill side, about 65 deg angle.

a pulley on that and a tagline going to the top of the tower tree, through another pulley and to the ground.

The alternator was attached to the pulley, and pulled up with the tagline, then when we got it to the top we had to lift it overhead and set it on the tower stub.