Author Topic: 8 inch dual disc tunnel test.  (Read 1268 times)

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Jerry

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8 inch dual disc tunnel test.
« on: July 08, 2009, 12:41:14 AM »
Heres a picture of the genny in the tunnel.


The blades  started to spin at 5 mph. I saw a small amount of amperage start at 7 mph.


This is a 24 volt unit so I added a 12 volt Optima to ther exsisting 12 volt bank.


I wanted to compair this small 8 inch duel rotor to Hughs larger 9 inch single rotor.


Hughs alt also has much larger magnets. However this 8" is the duel 12 magnet 9 coil arangement while Hughs is 8 magnets single rotor and 6 coil stator arangement.


To compair the units I found 11.4 mph was a consistant speed with enough time for both units.


Hughs did 2.25 amps at 12.024 volts for 27.054 watts.


The littel yellow 8" did 2.13 amps at 24.84 volt for 52.909 watts. Same blade on both machines.


BTW the 8" is wired Jerry Rigged with 9 each 6 amp fullwave bridges. Each coil has its own bridge and each coil has many turns of very fine wire.


There is a story on this littel unit during a big NW wind storm in my diary.


I'm still wiating for the oficial 4ft Hugh blades so I can test his unit with the recamended blades.


My cabinet maker is building the blades.


So far this unit is out preforming the Garbogen.


I'll be biulding more of these littel guys. I'm acctully gathering the parts for a 14-11 NEO. The 14-11 worked so well in ceramic I'm sure it will be awsum in NEO. No iron in the coils on this one though and a much bigger blade ofcource.


                            Jerry


                           

« Last Edit: July 08, 2009, 12:41:14 AM by (unknown) »

Onthero

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Re: 8 inch dual disc tunnel test.
« Reply #1 on: July 08, 2009, 08:51:20 AM »
Nice test !

So your alt has 2*12magnets ?

Seems logical that if you double the magnets(strength), the Voltage get doubled too ?
« Last Edit: July 08, 2009, 08:51:20 AM by Onthero »

defed

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Re: 8 inch dual disc tunnel test.
« Reply #2 on: July 08, 2009, 03:30:27 PM »
the Hugh's is a 12v version?  i'm making a 24v 4 footer as a test before i go for Dan's 10'.
« Last Edit: July 08, 2009, 03:30:27 PM by defed »

fabricator

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Re: 8 inch dual disc tunnel test.
« Reply #3 on: July 08, 2009, 05:16:24 PM »
I don't quite understand the bearing arrangement you have there, is it just pvc pipe in pvc pipe hangers?
« Last Edit: July 08, 2009, 05:16:24 PM by fabricator »
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

fabricator

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Re: 8 inch dual disc tunnel test.
« Reply #4 on: July 08, 2009, 05:18:33 PM »
Ok, I think I see it now, that is the stator bracket and bearing holder.
« Last Edit: July 08, 2009, 05:18:33 PM by fabricator »
I aint skeerd of nuthin.......Holy Crap! What was that!!!!!
11 Miles east of Lake Michigan, Ottawa County, Robinson township, (home of the defacto residential wind ban) Michigan, USA.

Jerry

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Re: 8 inch dual disc tunnel test.
« Reply #5 on: July 08, 2009, 09:44:52 PM »
Hi Onthero.


Yes. I've been testing many gennys. This one is a few years old. Its not quite normal.


The coils are wound with 250 turns of 22 ga. wire. Then each coil has it own and seperate 6 amp fullwave bridge diode pkg. Then all the bridge dc outputs are perelelled.


The other rotor genny is Hugh Piggots 4ft 8 magnet 6 coils of 85 turns 16 ga. wire 9" single rotor design.  I've been compairing these machines and sevearl others.


The magnet count dose not so much determin the voltage. Hugh says to make his 4ft machine 24 volt just wind 170 turns of smaller ga. wire. Its the turns count that detemins voltage.


To make my littel duel machine 12 volt I would simply wind coil at 125 turns of larger wire.


                       Jerry

« Last Edit: July 08, 2009, 09:44:52 PM by Jerry »

Jerry

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Re: 8 inch dual disc tunnel test.
« Reply #6 on: July 08, 2009, 09:59:02 PM »
Hi defed.


After I'm finished with all the testing of Hughs littel 4ft machine I'm going to make some changes.


First will be to add the second rotor, no magets. Next I will wire it Jerry Rigged.


I've wound the coils 2 in hand 85 turns 19 ga. I've made conection so each coil can be wired sires or perelell.


In jerry rigged each coil will be siresed  resulting in 170 turns per coil of 19 ga. then the each coil directly accross from each other will wired in sires. This is then 1 phase with 340 turns of wire. Then each phase will have its own and seperate fullwave bridge rectifier. Then all bridge dc outputs will be perelelled.


This is what I've done in the littel yellow duel 8" that is doing so well in the tests.


I'll fly this unit with a 5ft blade. The power level will go way up. This will make a quite usfull small genny.


For now I'm using it as a well astablished referance genny to compair other 4ft units to.


It will be fun to compair its befor and after power output.


                                 Jerry


                               

« Last Edit: July 08, 2009, 09:59:02 PM by Jerry »

Jerry

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Re: 8 inch dual disc tunnel test.
« Reply #7 on: July 08, 2009, 10:03:06 PM »
Hi fabricator.


Actully the pipe is metal. It holds the bearings and shaft.


I tested the foam pipe blades today. Wow they start up very early. But there way out of ballance so I gota fix that first befor I get any #s from the foam pipe blades.


They look real promising though.


                         Jerry

« Last Edit: July 08, 2009, 10:03:06 PM by Jerry »

Onthero

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Re: 8 inch dual disc tunnel test.
« Reply #8 on: July 09, 2009, 04:47:05 AM »
"The magnet count dose not so much determin the voltage."

So yours has an extra rotor (and thus a double amount of magnets) but it dont seems to affect much (amps ?) ?   Strange ?
« Last Edit: July 09, 2009, 04:47:05 AM by Onthero »