I'd finally managed to put together my first windgen, and had it on a teststand bolted to a wooden platform. The wind was good today, although a bit turbulent (due to the immense height of 15cm (tip of the blades) above ground.
), but it performed surprisingly well - until i turned my back to it, and a gust broke the 'mast' of the teststand...
It is completely my fault, thinking that a alu-tube with 1mm walls (that grey, bent bit, upper left of the pic.) would be good enough for winds at 6-7m/s...
But it's what i had laying around...
The blades, at 1.1m (2.2m diam.) performed well, reaching cutin speed at 3m/s, and put out 8-10A into a fully charged 80Ah 12V battery at around 6-7m/s. The alternator have 8 magnets 20x25x50mm and 6 coils with 1.2mm wire; 70 turns.
Oh, well - now at least i have the experience of making blades... AND breaking blades...
