Author Topic: 2 meter Blade Diameter (Read 1599 times)

(unknown) · « **on:** April 01, 2007, 08:38:50 PM »

I decided to steer clear of the ebay alternators, I have a 2m 3 blade and hub rotor that I need to match an alternator to. The axial flux ones look doable if I can order some of the parts premade (like the magnet rotors). I have very limited access to machining capabilities so I need to get what I can as premade parts. I was thinking of a tilt back furling system with a hydraulic damper due to simplicity. I have a 40 foot tower that is 4.5inch dia on the bottom and 4 inch top with an adapter for a 1.2 inch mast so that is covered. The 12 inch looks nice and according to the blade calculator the 2m set I have (free from a friend) should be able to work but I am open to input. Looking for 12 volt charging/water heating in dump mode.

Nando · « **Reply #1 on:** April 01, 2007, 03:02:47 PM »

WATER HEATING !!

I do not recommend 12 volts, for easier work and much better efficiency try a high voltage generator.

This way the losses will be lower as well.

How may watts are you aiming for ?.

Nando

Mary B · « **Reply #2 on:** April 01, 2007, 03:15:15 PM »

Battery charging is going to be the primary use. Water heating is just the dump load. 500-600 watts would be nice and should be able to be done with that blade set. I can't turn down free stuff! I can cut some tubular pieces as needed and take them to be welded. And I do have a drill press for for some of the hole drilling.

vawtman · « **Reply #3 on:** April 01, 2007, 04:17:41 PM »

Hi Maryalana

You could use brake rotors from a junkyard and epoxy the mags to them.

wpowokal · « **Reply #4 on:** April 01, 2007, 06:01:23 PM »

Do our hosts have any parts you are looking for,

http://www.forcefieldmagnets.com/catalog/index.php?cPath=22_30

allan down under

Flux · « **Reply #5 on:** April 02, 2007, 01:15:50 AM »

If Dan doesn't, try Ed at Windstuffnow. He was doing a kit that would suit 2M very well.

Flux

FreeBreeze · « **Reply #6 on:** April 02, 2007, 06:07:10 AM »

Try www.windchasers.com for your magnet rotors.

$30.00 CDN

Mary B · « **Reply #7 on:** April 02, 2007, 10:50:51 AM »

Thanks everyone, I ordered some 8 inch rotors from Ed :-) and I have a rough plan for the tilt back furling. Part of it came from a post on here and part from the junk I have in the shed!

hvirtane · « **Reply #8 on:** April 02, 2007, 03:33:42 PM »

If you don't own a lathe, you can use eight corner even four corner magnet rotors. It doesn't matter if they are round or not. That only matters if your magnets are in laid down on a circle.

But I'm happy you already managed to find suitable rotors from Ed.

- Hannu

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