A Crane. Foundation, Arm, Pulley. Cut a piece of wood about 5½ inches by 4½ inches (H in Fig. 304). Cut a second piece a square, A, side 2½ inches. Cut off the corners. This forms a stand on which the crane, etc., is fastened.
Cut a piece of stripwood, ¼" x ½" x 8". This is the arm of the crane, C, and is usually inclined at an angle of 45° to 60°. To support this arm cut B with sides about ¾ inch, angles 45° or 60° and 30°.
Fig. 304
Fig. 305
Cut two pieces of stripwood ¼ inch by ¼ inch, each 2 inches in length; shape like E and F in Fig. 305. These can now be glued and nailed to the arm C, projecting an inch beyond.
A wheel for the pulley is cut from a round rod about ¾ inch in diameter.
If a groove is to be made round the circumference, the wheel should be about ¼ to 3/8 inch thick. The groove is made with a file. A simple way to make the groove is to cut two cardboard discs a little larger in diameter than the wheel and glue them to each side of the wheel, in which case the latter need not be quite so thick. A hole is drilled through the wheel and enlarged by a round file to ¼ inch in diameter.
A piece of wood is now rounded for an axle, so that the wheel turns on it easily. This must fit tightly between E and F. Pass it through the wheel and glue it in position (G in Fig. 305).