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
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