The speed and voltage data can then be combined into a power curve, the variations in power are due to uneven cranking. The 22 ohm resistor was chosen because I had one in a box somewhere. To get peak performance from the generator will require matching the impedance of the load to the impedance of the generator. The planned load is a USB power pack.
Whilst messing with electronics and Fourier transforms has been instructive, so too has hand cranking the generator, clearly the torque required varies with the value of the resistor, with a 10 ohm resistor the torque required almost pulls the generator of its mounting.
So on the next trip to the beach, I’ll take a bag of resistors and see how they effect the ability of wind to turn the rotor.
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