Circular air-screw with increased efficiency - has regularly shaped segments with flat surfaces made from flat disc

摘要

The simple construction airscrew is made from a flat disc, with a central circular hole and with the blades made from radial segments of the disc. The blades are further bent into similar angles with plane surfaces. The blades have a segment angle of 29deg. and are evenly spaced. At least 8 blades are used, with a maximum of 17 for the highest performance airscrew. ADVANTAGE - Simple construction, selected efficiency.