This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
The amusement of kite flying can be broadened by adding the kite-line traveler shown in the sketch. The frame of the traveler is made of poplar, spruce or soft pine, 1/4 in. square. The horizontal piece is 24 in. long and the piece to which the wings are fastened is 8 in. long. This piece is cut so it will have a slight slant. The brace is a mitered piece, 13 in. long. The frame is fastened together with small brads, giving it the appearance shown in Fig. 1.
After the frame is finished, the traveler wheels are made and attached. They should be 1/4 in. thick, about 1 1/4 in. in diameter, and have a groove cut 3/16 in. into their faces. The pattern for cutting the bearings is shown in Fig. 4. These are bent at the places shown by the dotted lines and attached to the main frame stick as shown by BB in Fig. 3. The end view of the bearing is shown in Fig. 5. The metal is bent in as shown by AA, so that the wheel will rotate without much friction.
In Fig. 6 is shown the method of attaching the wings to the slanting frame part. The wings are made of light cardboard and each fastened with tacks to a wood arm, cut as shown. The large end of each arm is made to hinge in a piece of tin with brads AA.
Fasten a string to the ends of the arm pieces, as shown in Fig. 1, and attach a wire loop to the middle of the string, as shown in Fig. 3. The wire shown at L in Fig. 3 is bent and attached to the main frame so it will slide easily. The trip for dropping the wings, as shown in Fig. 2, is a small block of wood about 2 in. square and 1/4in. thick with a 1/2-in. hole in the center. Slip the kite line through the hole before tying it to the kite. Place the trip about 100 ft. from the kite and wedge it to the string with a small piece of wood. The eyelets SS are necessary, as they make it impossible for the pulley to run off the string.
Ill: Traveler Details
The traveler is first put on the kite string with the end having the loop L (Fig. 3) up, then, after letting out 100 ft. of string, the trip block is fastened in place and the kite tied to the end of the string. Hook the wire loop on the string attached to the ends of the wings in place in the wire catch of L, and it is ready for the flight. When the traveler reaches the trip, the loop L is pushed back, thus causing the end of the wire to slip out of wire loop and the wings to fall back as shown in Fig. 2, when the traveler descends ready to be set for another flight. - Contributed by Stanley C. Funk, Bellefontaine, Ohio.