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Author Topic: ? on Hughs 48" genny.  (Read 1885 times)

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Jerry

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? on Hughs 48" genny.
« on: November 23, 2005, 08:56:43 PM »
I'm intrested in some info on Hughs 48" genny. Here are a few questions.


Single rotor with laminations or dual disc rotors?


9 coil 12 magnets?


Disc rotor diameter in inches?


Magnet size?


Wind test #s mph, amps, volts, watts at 5, 10, 15, 20, 25, and 30 mph?


Thanks.


                   JK TAS Jerry

« Last Edit: November 23, 2005, 08:56:43 PM by (unknown) »
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DanB

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Re: ? on Hughs 48" genny.
« Reply #1 on: November 24, 2005, 08:00:55 AM »
Hi Jerry -


"Single rotor with laminations or dual disc rotors?"


single rotor with no laminations.  Not an ideal design - but very simple and well matched to the power produced by the 4' diameter prop.


"9 coil 12 magnets?"


8 magnets and 6 coils.


"Disc rotor diameter in inches?"


10" if Im not mistaken.


"Magnet size?"


1" x 2" x 1/2"


"Wind test #s mph, amps, volts, watts at 5, 10, 15, 20, 25, and 30 mph?"


Ill let you search for this 'cause I have to leave 5 min ago...

but the guys from Blue energy did fairly scientific testing on one that we built on Guemes Island in a wind tunnel and posted about it here somewhere perhaps 6 months ago.  

« Last Edit: November 24, 2005, 08:00:55 AM by DanB »
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If I ever figure out what's in the box then maybe I can think outside of it.

Flux

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Re: ? on Hughs 48" genny.
« Reply #2 on: November 24, 2005, 08:21:56 AM »
Yes there was a test done in a wind tunnel at MIT. I have googled the board and can't find it. Perhaps someone else better at finding things can turn it up. If someone can remember the name of the person posting it then it would be easier to find.


The test was not ideal as they let the battery volts run pretty high but I think even so it gives a much more realistic test then vehicle testing or taking spot readings.


I have the data somewhere, if no one can turn up the reference I will try to find a way to post it or summarize the basics but the whole thing is here somewhere as an excel file.


Flux

« Last Edit: November 24, 2005, 08:21:56 AM by Flux »
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Flux

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Re: ? on Hughs 48" genny.
« Reply #3 on: November 24, 2005, 10:45:55 AM »
« Last Edit: November 24, 2005, 10:45:55 AM by Flux »
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seanchan00

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Re: ? on Hughs 48" genny.
« Reply #4 on: November 24, 2005, 05:05:42 PM »
Hi Dan,


I have raised my 48" radius triple blade genny for 4 days and yet to see it spin as the wind is not very strong. On the ground I have felt wind more than 5 mph. Have I mismatched it to my twele inch 9 coil 12 magnet(1" x 2" x 1/2") dual rotor as you advised me months ago. It can produce good power when hand spun, enough to light up a 20 watt flourescent light through 150 feet of 2.5 square mm wires.


Waiting to post story with pictures when it works to expectation (:>)


SeanChan from Malaysia.

« Last Edit: November 24, 2005, 05:05:42 PM by seanchan00 »
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Jerry

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Re: ? on Hughs 48" genny.
« Reply #5 on: November 24, 2005, 07:46:57 PM »
Thank Flux.


What a great read. I wounder if the wind tunnel Ed will be visiting will be simular to MITs?


How about Ed? Where are you on that one?


Looks Like the 4ft Piggot mill did these #s in the wind tunnel.


  5 mph 0 w.


 10 mph 20 w.


 15 mph 50 w.


 20 mph 140 w.


 25 mph 230 w.


 30 mph 350 w.


Hope I'm close? Thats as best I could tell reading the graph?


                    JK TAS Jerry

« Last Edit: November 24, 2005, 07:46:57 PM by Jerry »
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Flux

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Re: ? on Hughs 48" genny.
« Reply #6 on: November 25, 2005, 01:14:47 AM »
SeanChan


With a 48" radius (8ft dia) prop and an air gap alternator it should be spinning at 5 mph. It may be that you have too much grease and if it has tapered roller bearings you may have pre loaded the bearings. Wait for a bit more wind and see what happens.


Things usually free off and start better after it has run for a while.


You will not know about the matching to the prop until it starts to make power so that is not an issue at this stage.


If there is a reasonable breeze and it still doesn't start then try disconnecting the rectifier ac leads if you can get at them.


I think that if you had made a connection error on the stator you would feel it when turning it by hand.


If it is on a temporary mount down among the trees you may not have the wind you think you have as it may be mostly turbulence.


Flux

« Last Edit: November 25, 2005, 01:14:47 AM by Flux »
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seanchan00

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Re: ? on Hughs 48" genny.
« Reply #7 on: November 25, 2005, 05:32:07 AM »
Thanks Flux for your reassuring input. It is permanently up at 53 feet and I just lowered it to see why it is not turning. One blade seems a little heavy so I balanced it but not perfectly yet. A spin by hand and the blade seems to freewheel quite well. I may have hit the intermonsoon period and it is actually a very low wind period. Maybe things will brighten up in a few days when the south-west monsoon change decisively to north-east monsoon. Will keep you posted when the wind blows.


SeanChan.

« Last Edit: November 25, 2005, 05:32:07 AM by seanchan00 »
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IntegEner

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Re: ? on Hughs 48" genny.
« Reply #8 on: November 25, 2005, 10:01:42 AM »
This is a short note to Jerry and friends. The below image is of a wood tower available for testing some of the designs that were mentioned in your posts and shown on your images. This tower will be used also for testing of small "verticals", which seem to be getting some play here. The tower is about 15' tall. The wind is good and steady at this location and a hand held wind meter is available.


It might also be mentioned that a thin bladed 3' diameter experimental free-wheeling device is pictured on the website that ran super fast with its flat, doubled, offset blades, implying that your four-bladers could be tried with two doubled-blades instead to gain reinforcement in each from one blade behind the other with a strut between.




Knucks the (Air) Knucklehead

www.integener.com "Be sure and safe while making something that works well. This is a cause for much joy when done."

« Last Edit: November 25, 2005, 10:01:42 AM by IntegEner »
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IntegEner

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Re: ? on Hughs 48" genny.
« Reply #9 on: November 26, 2005, 08:17:30 AM »
Here are a few (Knuckselheadian) drawings that have been loaded into the files:




Knucks

www.integener.com

« Last Edit: November 26, 2005, 08:17:30 AM by IntegEner »
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windcruiser

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Re: ? on Hughs 48" genny.
« Reply #10 on: November 30, 2005, 04:58:33 AM »
Hallo Flux,


There is this story  iread about a Hughs turbine undergoing a wind turnel test at MIT. Google some guys called Blue Energy.


windcruiser

« Last Edit: November 30, 2005, 04:58:33 AM by windcruiser »
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