Drill/file two 16mm holes into the end
of the 40mm box section. The holes are offset from each
other by about 10mm. The top hole is closer to the end
of the 40mm box. Use the diagram as a guide.
Make sure the 16mm rod slides
through. These offset holes will hold the rod at the angle
needed for our furling tail. Angle is not critical, we
adjust furling later with tail length and weight.
Tac and weld the 40mm box
onto the 65mm box, about 10mm in from then end we bolt
the stator to. Make sure the 16mm hole closest to the
end of the 40mm box is facing up and back. This photo
was taken from the under side of the windmill.
Sit the 50mm id pipe on the
windmill as shown. The pipe sits in the middle of it length
here, but this is not critical. Make sure its square,
and fully weld. Make sure you weld down both sides of
the pipe, its a tight angle to weld in but important.
This is our yaw bearing.
Cut 4 triangle pieces of
scrap steel, about 25 * 25mm.
And weld these onto the windmill
as shown. These give more strength.
Once all the welding is done,
tap out the 6mm holes to suit the 6mm stator retaining
bolts. Its best to do this after welding as any welding
splatter will quickly stuff a thread.