old alum sheet. trying stressed skin on tube for blades. base is 1/2" emt. with 5/8
grade 5 x 8" bolt with head cut off hammered into tube for root of blade.
root is 9" @19 deg. tip is 4" @2 deg.
center plates are 10 ga. 1/4x20 grade 8 fastens blades to plates.
total rotor weight... 21.5# dia. 8.5 ft
will monotior rpm with modified optical tach. 2 3/8 x 1/16 neos on back of hub. w/pickup coil.
wind speed, bicycle anemometer
alt.= dual plate 12 pole 9 coils star. shaped mags from ed, mount from hugh, i'm hopeing for a good mix, time and mother will tell the whole story.
Frank