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You are trying a different design for the blades this time?
Concerning the low RPM subject, after we finished our vertical turbine we faced a problem with generating power. I know that the vertical turbine produces electricity less than the horizontal but we just got like 2 volts without any load connected. We didn't use any gears though we just connected the shaft to a stepper motor but not a NEMA version. We will try using gears, belts and pulleys, and other motor versions. So, i was wondering if u have any suggestions to produce more volts.
Also we faced another problem with the startup of the motion it appears to rotate by itself whenever there is sufficient air speed but after we attach the motor it becomes really harder to do so and it needs like a jump start or a very strong wind speed like from an air-blower to start rotating. So, if u have any suggestions for this as well that would be really appreciated.
I have attached a photo to help you imagine what it looks like. The rod is held by bearings in the wooden block.
Thank you greatly for your time and effort, Good Luck with the blade splitting problems and hope to see the design come into full bloom ^_^