The rotors are made by gluing strong magnets to an old car disk brake rotor, still on its bearings. The coils are hand wound pancake coils placed sorta-close-to these rotating magnets, but not too close or it'll stall it. 3,000 watts of rectified DC output is pretty simple, but your rotating propshaft internal or dragged behind the boat, won't produce as much power as their home-made wooden rotors do.
Notice how SLOW their alternators turn....no noisy gear trains, no belt drives, no pulleys.....
I can just see an old brake rotor spinning behind the sternrail on its long shaft trailing out behind your sloop, its copper stator coils shining in the sunshine against the sea.....(c;
The guys whos webpage this only have a few complaints, one of which is what to do with SO MUCH FREE POWER!
(Don't miss the hamster powered alternator pages done just for the kids...(c;)
spam@nospamskddjl.com (Mic) wrote in news:427e1c63.1097518@news.sprint.ca:
Or any alternative method for a electrical water powered generator for> crusing a la homemade.....>
PS - I like what he says about his new 17' machine....(c;
"So far the machine works quite well. It has such a huge swept area compared to our previous machines that it seems to start up in practically no wind, and it's making a little power by the time the anemometer says 5 mph. At 10 mph it's doing around 400 watts and at 16 mph it's up around 1.5KW. Above that I believe the blades are overpowered a bit by the alternator. I do see 2KW from it frequently and I've seen about 3800 watts from it a couple times in very high winds, but overall I believe the blades are held back a bit in higher winds by the alternator. I can improve it by adding a bit of resistance to the line - this would allow it to speed up in higher winds and the blades would run more efficiently - but as it is it seems very slow and peaceful, and it rarely goes over 200 rpm It's producing quite a bit more power than I can really use. So I'll leave it as it is, it's quite a good low wind machine I think. Time will tell how it holds together! It has been fun, the whole project took 3 weeks from start to finish, I had some friends and neighbors (all of which have their own homebrew wind turbines) helping along the way which was wonderful."
We'll never have one this big on any boat, but it shows how efficient this flat alternator really is being so simple.....maybe driven from a screwshaft dragged behind the boat?
Thanks for the link Larry....I have also read Hugh Piggot of Scorecraig Scotland....
What about the trolling motor idea.....? is it a PM motor? Do you think it can be done? I like the Duogen of england concept but it just too pricey.....
Larry I have followed your posts for sometime and usually been well entertain and informed,,,,,
LARRY LINK; http://www.qsl.net/ns8o/fd99.htm Field Day 1999 at the NC8V Caboose We amassed 1125 QSO's in 24 hours of operation covering 80 through 10 meters in both CW and SSB modes. Operators were: NC8V, W8MHV, N8XWO, AA8EB, WD8RIF, WD8JLM and me, NS8O.
Larry are these friends of yours?????^^^^^^^Chech out their HUT.....
Do these trolling motors have permanent magnet motors?
I believe that is the case. But the prop pitch is quite wrong for a turbine.
Water moving horizontally at 10 knots equals about a 4 foot static head pressure. If you figure out how to economically generate power from that, get a patent, because there is endless tidal energy available at that differential.
spam@nospamskddjl.com (Mic) wrote in news:427e69f8.11182996@news.sprint.ca:
What about the trolling motor idea.....? is it a PM motor? Do you> think it can be done? I like the Duogen of england concept but it> just too pricey.....>
It would put out "something", but not anything significant because you'd have to turn it awfully fast (watch it run as a motor), which you can't....and its magnets aren't strong enough to produce much power if you can't.
spam@nospamskddjl.com (Mic) wrote in news:427e7c8c.2066130@news.sprint.ca:
Larry are these friends of yours?????^^^^^^^Chech out their HUT.....>
No, I never met the guys at otherpower.com. I stumbled on their website searching for generators, one night. One must admit they are MOST resourceful. The power they get from a brake disc is simply amazing.
Rube Goldberg would have been very proud, indeed....(c;
spam@nospamskddjl.com (Mic) wrote in news:427f8979.4000792@news.sprint.ca:
Towed water gennys, even if just the prop to a rail mounted genny just> has too many issues.>
I've posted a picture of Lionheart's shaft-driven alternator that puts out 15-20 amps at 7-8 knots in binary newsgroup alt.binaries.pictures.sports.ocean
This binary newsgroup is DEAD. It's a great place to post pictures for rec.boats newsgroups.
http://www.hamiltonferris.com/2.html#Alternators POWERMAX High Output Alternators charge batteries up to 5 TIMES FASTER than standard alternators. This means drastically reduced engine running time, saving fuel, engine wear, and noise. A standard "automobile-type alternator is designed only to replace the minimal engine-starting draw.
When you use an alternator what about the power it uses to energize the "fields"? How many amps is that?
Water moving horizontally at 10 knots equals about a 4 foot static>>head pressure. If you figure out how to economically generate power>>from that, get a patent, because there is endless tidal energy>>available at that differential.>
Well I have re-research this concept and am providing the following> links:
Some clever improvisations, but none that are economical in terms of $/kW-hr.
