To qualify as an Out of Aperture (Exposed to flow) prop, the strut is in the form of a molded housing, intregal with the hull, enclosing the full length of the shaft as well as the void between the shaft and the hull.
It will either be:
Folding the blades are hinged and fold together to reduce the drag when not in use. |
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Feathering the blades rotate on the hub to reduce the drag when not in use |
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Fixed or Solid the blades are fixed in place |
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