Thanks for the reply GrahamMac. I envy the pleasure you get out of your inventions. I thought the hour-glass was a masterful touch. We would have to go to 8 minutes min because our bodies have larger than average surface areas. Re the wind generator, I might try an experimental suburban version with a tall collapsable mast I have & a couple of automotive alternators & just see what I can power out of that through a couple of batteries.
