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  #51  
Old 03-31-2011
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Quote:
Originally Posted by arf145 View Post
A wind generator that can start producing power in a breeze of .5 mph would open it up to areas where they just weren't practical before.
Their cut-in speed is quoted at 2 metres per second. That's a fraction under 4kn (4.4 mph) not a half an mph. A Rutland 913 has about the same cut in (they claim 5kn). And for just $850.

It's a bit difficult to compare outputs given that this is a mains device. At 230 volts it's putting out just a little over 2 amps. One wonders what it would do at 13.7 volts.
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  #52  
Old 04-01-2011
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Quote:
Originally Posted by Omatako View Post
Their cut-in speed is quoted at 2 metres per second. That's a fraction under 4kn (4.4 mph) not a half an mph. A Rutland 913 has about the same cut in (they claim 5kn). And for just $850.
I believe the lit said not 2m but 0.2m.

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  #53  
Old 04-01-2011
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Originally Posted by arf145 View Post
Hey, that is very interesting John! I wonder if that scales down well?
That's what I was wondering, too.

I'm not holding my breath that we'll find out anytime soon, though -- it seems like Honeywell is targeting the shoreside market with this package.

Still, it might inspire a new approach from some of the companies now serving the marine market.

I've also wondered if it might scale "up", and we might see a new kind of wind turbine in the wind farms?
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  #54  
Old 04-01-2011
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Originally Posted by JohnRPollard View Post
I've also wondered if it might scale "up", and we might see a new kind of wind turbine in the wind farms?
Man, those things are big. I recently worked on the importing of a crane and transport arrangements to transport components from Auckland port to a new wind farm in the area. Some facts about the turbines:

"Each turbine, once fully assembled, is 130.5 metres high and weighs 318 tonnes. Each turbine consists of three main parts – the base tower, the nacelle and the blades. Each base tower is 80 metres high and weighs approximately 169 tonnes. The turbine blades are each 49 metres long and weigh 10.9 tonnes. Each nacelle is 3.5 metres in circumference and weighs 81 tonnes. Each of the 28 wind turbines has a maximum generation capacity of 2.3 megawatts. Turbines will generate electricity in wind speeds of between 14km and 90km per hour."

The crane we assisted with importing has a 600t capacity and was used in concunction with another 300t and a further 200t unit during the assembly.

Sorry, didn't mean to hijack the thread.
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  #55  
Old 05-11-2011
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Wind Generators

Interesting discussion. I have a Rutland 913 which I am going to sell, as it is OK in law winds, putting out 90 Watts at 19 knots, which of course is only about 7.5 amps. I need more power and have been trying to decide on a new machine. I looked long and hard at the Air Breeze, and many people have, someone mentioned, changed the blades to the blue ones, both on the Air X and the Air Breeze. Those blue blades are made by Spreco in Germany and are much quieter, and also more efficient than the original ones. That has led me to consider the Silentwind wind generator, which puts out about 14 amps at 20 knots.
It has now come down to a choice between the Silentwind and the Superwind 350. They both have about the same output, but the Silentwind is quieter and less money.
Any comments..............??
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Old 05-11-2011
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I recently helped install a Superwind 350 on a Westsail 32. I can`t imagine a quieter wind gen. If you are close enough all you hear is the blades in the wind. And you have to be very close to hear that. There is no vibration evident on the boat. When you place a hand on the stainless pole it is mounted on (9 feet tall) there is not a hint of vibration.

How much quieter is the Silentwind supposed to be.
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Old 11-15-2014
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Re: Choosing a wind generator

I started in 1990 with a Windbugger, not the original 2 blade but a 3 blade. A bit noisy, good output but expensive parts and lots of brushes. Bugger Bob used to grind the identification marks off the generator so you always had to go to him for parts. The thrust bearing needed a lot of attention

In 2004 I got a KISS. Excellent unit, good output and fairly quiet. Parts easy to get and they used to tell you where you could get them, usually an auto parts store. Main knock on this was that it used to cut out at 25 knots due to the thermal switches to prevent overheating. To get around this I used to tie it slightly off the wind when it honked. Excellent unit and the noise at 25 knots was my anchor alarm. Time to get up and check the anchor. A simple high output unit. Used it for ten years without a hitch, although towards the end I think the bearings might have needed to be replaced.

Last January I tried to get another KISS but John at Hotwire could not deliver for a month or two and I couldn't wait. I ended up with a D400. Being a hater of anything electrical coming out of England I was pleasantly surprised. The unit is the best of the bunch. Quiet, too quiet as I can longer rely on the noise being my anchor alarm and a good output curve.

I leave it running even when I'm off the boat. The KISS was unregulated and I usually tied it off when not on the boat. The only knock on the D400 is the price.
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  #58  
Old 11-16-2014
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Re: Choosing a wind generator

Quote:
Originally Posted by MacGyverRI View Post
Make sure you use Blocking Diodes or Rectifier Diodes...

...Too large of a Diode power rating (i.e. 50 Diode on a 20 Amp system) can cause you to lose Amperage.
Not sure that's correct. Diodes have a simple lowering of voltage. A bigger diode is simply like more diodes in parallel. It won't mean lower amperage.

There are different types of diode chemistries that will mean a lower voltage drop (0.3 V versus 0.5 V) but that's a different discussion.

Regards,
Brad
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  #59  
Old 11-16-2014
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Re: Choosing a wind generator

Unless you are in a cloudy and windy place, I don't understand why you'd want a wind generator over solar panels, unless it's pure short-term cost. I've had both and now have 540 watts of solar and loving it.

I also found that the published average wind speeds for locations are very misleading. They are more like the average peak wind speed. In my home waters, what was published as a 7 knot average in July was more like a 7 knot average daily peak wind speed. I thought I'd have a lot of power, but instead had just small amount of power on some afternoons. Then when the wind picked up, you had to feather it out of the wind to get any sleep.

Of course, our large-bladed wind generator eliminated tacking at anchor, which was nice. Until my wife needed it feathered to get some sleep, that is.

Regards,
Brad
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  #60  
Old 11-16-2014
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Re: Choosing a wind generator

I am just about to buy a wind generator to help the solar panels at night. I have just upped the solar from 240 watts with an extra 70 in the mornings to 380 watts. But the freezer at night draws too much to freeze so I want add a few overnight amps from wind.

So I am going to buy a Sunforce 600 which is $900 here, ($800 in the usa). Its got a few bad reviews on the internet but I dont know if thats from people who expect too much. I am in the trade winds and even in bays get a good 12 knots steady wind on average.... And a few months of much higher!

After that I will increase the battery bank from 320 amp hours to 480 amp hours.


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