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I wonder if it will be Man enough for
the job?
On 12/06/13 18:50, Graham wrote:
If there is a stream , then all you need is one of
these back shot wheels
G.
Sent: Wednesday, June 12, 2013 9:38 AM
Subject: Re: LF: DIY WIND GENERATOR
On 11/06/2013 23:02, Markus Vester wrote:
The plan is to have the
ebike pull myself and the equipment onto some hilltop. Then
mount wind blades onto the front wheel, and get the kite up
for a three-hour VLF dash while topping up the battery on the
side. Then roll downhill and come home with the fully
charged battery ready for tomorrow ;-)
Marcus / LF
A beautiful concept. Hardly marketable though. "With our ACME
system you can can out (only on windy days) preferably up a hill,
and return using free energy".
:-)
The wind is a fickle beast. We did 6 Months touring France using
only wind energy for electricity (some lowlife stole the solar
panel early on) we were becalmed in the Vercors mountains when we
had to stay put, so no charging from the engine. The sun was
relentless and started forest fires. In the last week of the tour
there were gales, screaming generator, fully charged batteries and
20 Amps to dump day in day out.
Wondering
about Eddies remark on the rpm mismatch between propeller
and alternator - what would be the optimum frequency range for
either side? I
Yes, Christian also noted the apparent lack of gearing. With the
use of a car alternator which was not designed for the job it is
very difficult to get efficiency. All alternators have a 'cut in
speed', horrible term, in RPM, which in wind generators is stated
in wind sped (knots).
My 20Amp Wind Generator has a cut in speed of 8 knots, its rated
at 20Amps but you have got to have a 60 knot wind to reach that.
It is definitely not as easy as putting a fan on the shaft of a
car alternator to produce a "HOME BREW WIND GENERATOR 12V/100A"
73 Eddie G3ZJO
--
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
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