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Attach the coupler on the motor to the drive shaft with the 1/2" x 4"bolt.
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Fit the motor and coupler to the main rotor shaft, P21
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Pass the 12" long, 1" threaded rods through p24 then through the tubes ], through p23 and thread them through the nuts welded to the far side of P4.
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Attach the 4 further nuts to clamp the motor to the tubes, and the tubes against p23, in a sandwich
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Tighten the 2 screws in the collars of both bearings to the shaft (should be separated by 120 degrees).
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