Counter Rotating Dual Pinwheel Tapedrive Genny

[TomW]

Front view sitting on the bench fully assembled except for wireing and a tail.

Tape Drive Motor mounting and pivot detail. Yes that is an aluminum 4 foot level.

Rear of pinwheel assembly showing the support pieces of aluminum strap.

More detail of pivot assembly attachment.

The far side which is just the same as the near side.

The pinwheels rotate clockwise on the right hand one and counter clockwise on the left handed one.

The side boom is 4 feet wide total with the pinwheels approximately 42 inches center to center.

Just one of the pinwheels close up.

Hopefully tomorrow I'll get the motors wired in series, a tail on it and up on the pole.

Cheers.

TomW

[Demetri]

Just curious, why did you make them counter-rotating? Any special reason? I'm looking forward to the test results.

Demetri

[TomW]

Demetri;

I think mostly because they use counter rotating shafts to keep things from getting harmonic vibration. Like in motorcycle engines and I believe props on opposite sides of a plane rotate opposite directions.

But then again, its always about the learning and I thought it would be cool.

It unscrewed one of the props due to the installer [me] not double checking nuts on the arbor. The CCW prop unscrewed itself very soon after the wind got up and I had to take it down. I was seeing some fair volts considering it was likely only half working.

Its currently on the bench getting put back together and I think in the end it will be a fair little unit.  

Cheers.

TomW

[wiredup]

hey tom neet idea.the work i have done with dual blade machines.says they keep good balance and look relly neet flying.have two, been up and running for ten years.no generator hooked to eaither one just fun . pinwheels good idea adds another look.good job.....staples