Plan for Whirligig #39
Plan for Whirligig #39, 24″ x 18″ (61cm x 46cm), pencil on paper
Whirligig #39 will have three sets of blades arranged on a crankshaft. The fore and aft blade sets will be fixed to the crankshaft and drive it. The center blade set will rotate in the opposite direction and at the same time move in an offset circle two inches in diameter. I have finally located a source of sheet aluminum heavy enough to serve as a vane. This design introduces some asymmetry to construction, which will be come evident on completion.
