Feedback on Sencenbaugh's O2 Delight: Windmill Blade Design

A reader in Romayor, Texas questions the efficiency of the windmill blade design Jim Sencenbaugh used in his O2 Delight windmill. Jim Sencenbaugh explains his decision and comments on current and future refinements he's planning. Originally published as "Feedback on SENCENBAUGH'S O2 DELIGHT" in the July/August 1973 issue of MOTHER EARTH NEWS.

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