Frank -
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Originally Posted by Frank Lee
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Do you think if this was front-dead-center, like where the license plate is, it would even spin, let alone generate more than one amp at 45-55 MPH? :
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"Open circuit," Mattias writes, "I get 15.6-16.3 volts at 75 - 110 mph [indicated airspeed], and the short circuit current is 3.6-4.9 at the same speeds. As I have a quite robust battery (high current, long-life 28 amp/hour sealed lead-acid) I didn't bother to build a regulator. I just put two diodes (MR754) in series and hooked it on the battery. I judge the risk for over-charging as quite small.
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"I've been flying with it for about 30 hrs now and I'm very satisfied. The biggest problem was to find a robust starter to convert. The ones sold nowadays are very cheaply built with a lot of plastic parts and simple bearings. I found a used "Pylon Brand Hi-Tork" with a robust metal housing and real ball bearings at both ends. It's a bit heavier (1.15 kg, 2 lbs something...) but that isn't really a problem for a Cub."
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CarloSW2