Dates: 5-12 May 2012 Location: Scoraig.
Project: 3 metre machine using ferrite/ceramic magnets at 24VDC
Poles: 10, (3 magnet blocks 50 x 50 x 20 per pole)
Coils: 12 (37 turns of 2 x 1.6mm wire)
Target cut in speed (recipe) 170 rpm
Application – the croft next door to me (for sale) on Scoraig. 24V system and 20 metre tower with dead Samrey prototype on it.
Accommodation the bunkhouse, Scoraig. Full-on home made food and frivolity.
The following video shows Jonathan helping me to put Paul’s (green painted) blades onto the zebra turbine. We also increased the air gap a little to make sure the magnets did not rub on the stator. The cut in speed is a bit higher than I would normally choose for a 3 metre turbine (195 rpm for 24VDC) but it runs very smoothly, and will definitely not stall at least.