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After the balancing bolts or equivalent weights are placed in position, spin the rotor again to
make sure it is well balanced. If the rotor is poorly balanced it will shake apart at higher speeds.
The frame which will support the rotor is in the same basic configuration as the support frame
for Rotor #1, with these differences:
it is taller
it is wider, to give room for a pulley and an alternator or generator mounting.
it uses locally cut wood poles instead of boards that are cut at a sawmill.
the horizontal supports (bearing supports) are in pairs notched and bracketed, lashed or
otherwise fastened around the vertical supports.
Cut the straightest, strongest wood poles you can find (4"-8" diameter).
The frame is designed to combine strength and simplicity of construction.
Joints in the frame must be fastened together securely. One way is to make 4 frame brackets
from 1/2" diameter mild steel rod.Bend suitable lengths to a U-shape while red hot. Thread the
ends. Drill 2 holes in a section of steel angle to accommodate the ends of the U-bolt.