So, if the shaft does not get locked in a position with the folded
blades vertically aligned (the proper orientation) it's possible for
the lower blade to "droop" and create some drag in low hull speed
conditions. Worst case would have the shaft locked with the blades
aligned horizontally.
However, the drag problem is minimized or eliminated at higher speeds
(3 knots, 4 knots?), regardless of prop orientation.

I liked the rubberband solution. Maybe a PVC concoction could keep everyone dry.

> If the shaft does not get oriented properly, do the blades produce a
> horrible drag, or just a "not quite minimal" drag?
>

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