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Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 10:26
Quote from: mbouwer on January 15, 2017, 09:06:55 AM
What to do to make them so ridgid to make them resist the heaviest storms?

Yes,  its always a compromise. Go OTT, (over the top) on design and hardware and manufact...

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 10:20
Quote from: Ungrounded Lightning Rod on January 15, 2017, 09:00:50 AM
Sounds right.  I'm guessing they're facing roughly away from the wind.
 - Blown downwind - like a tailless downwind turbine.  Probably substantially off fro...

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 10:06
Over the years it is always nice to read about your turbines.
I agree what you say about the Piggott design.
What to do to make them so ridgid to make them resist the heaviest storms?

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 10:00
Quote from: clockmanFRA on Today at 08:15:10 AMInterestingly, at first light and it was still windy and without tails, the Turbines were just lightly turning backwards.

Sounds right.  I'm guessing they're fa...

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 09:15
Yes they are all shorted out.

Interestingly, at first light and it was still windy and without tails, the Turbines were just lightly turning backwards.

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 09:08
You might want to short the ones that lost their tails until you can get them down.  Otherwise, if you have another storm and a gust happens to spin them up, they might start "wind seeking", stay spun up. and become unfurlable.

It's a small risk, but w...

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 08:55
Hi mbouwer,

Thanks for your offer, I am here in Normandy, PM me if you want to visit, you would be welcome.

I believe that Hugh's design is as effective as a machine as you can get. Its Simple, very robust, reliable and very importantly for me, its ver...

Re: Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 06:39
I would like to talk about real nice improvements for your turbines and really help you to make them.

Regards Rinus

Hugh Piggott ‘Jumping tails’!

Sun, 01/15/2017 - 05:07
Just when I thought I could get back to some Capital jobs/tasks!

A couple of days ago, here in Normandy, France, 50 minutes from the Atlantic coast, we had some appalling severe gusting/squalls  winds at about 100mph.

It only lasted 2 hours and left mo...

Re: battery sizing

Sun, 01/15/2017 - 05:02
"bog down and not spin very well."   That is running.   I never expected it would ever make more than 30W that way.  I could probably make it work with a modified buck converter, but I could never tell you how to do it. It would require a bit of experi...

Re: Active Pitchcontrol

Sun, 01/15/2017 - 03:30
The ceiling fan generator is back on the test stand.
If I drive it now with another motor. Does power come off it?

Re: battery sizing

Sat, 01/14/2017 - 22:26
Ok, I emailed someone at the company who sold me the wind turbine this:

"I purchased this but it was rated at 875w 48v. So pretty much the same thing. I have one 12v battery that I am wanting to charge with the turbine. The charge controller I a...

Re: Lithium Solar-BMS & Power Point Tracking Thermal Controller Kickstarter...

Fri, 01/13/2017 - 01:30
He is matching panel to resistance.  I'm not going to quibble over technicalities.  I see youtube people directly connecting panels directly to heaters and think that is fine.  It is terrible performance.  Having some simple software that switches in j...

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 23:43
If the whole thing becomes unreasonably large, there is no reason why two or three smaller wheels would not work.
That will also give you some backup if you need to do maintenance, modification or repairs.
Get a small one perfected first.
Then rather t...

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 23:20
I tried it at 4.4 or 3 mph to be conservative and I got 632 kwh per month.  Less than I was hoping for, but now I can play with the numbers on the calculator.   I will be there playing with numbers for a while.  Thanks for setting me strait.

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 22:59
Try about 6fps (4.09 mph)

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 22:52
I guess that is what I was doing wrong.  I guestimated the flow at 1 ft per second.  I will try it again with more accurate figures.

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 22:31
The simulator works if you enter a suitably high water velocity.
My figures:

10 fps or 6.8 Mph
Six foot diameter wheel
Width 96"
Blade thickness 1"
Shaft 1.5"
Generator 80%

Results:
1.965 Hp
Torque 600.8 Ft/lb
RPM 28.8
ten blades.

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 22:26
Hi Warpspeed,


I have it figured with 2' by 53' blades. If you had a sheet like that coming at you in 5 MPH current, I don't Think you could stop it.  Yes it is slow 4 or 5 MPH on average.

Re: Grid tie voltage? AC or DC?

Thu, 01/12/2017 - 22:16
The difficulty with an undershot wheel is it usually assumes watter running down a slope that has a reasonable amount of speed and kinetic energy.

A large mature river is usually a large very slow moving enormous thing, and that will be your problem.
I...