Sky Sport Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
aileron, and the leading edge in the front. Cut that part out, then trace the upper pat- tern for the end cap from the wing plan. It should be noted that the small tabs will eventually be broken off from the rear bot- tom of the last three ribs, but don’t do it now. The end caps should actually lay flat on the building board (they do extend down past the washout at the end of the wing). Now that the wing halves are done, it is
time to join them together. Lay the plans down, as shown in Fig. 9, again with wax pa- per on top. The wings should be exactly 5 inches apart, and the spars should be in line with each other. Lay the edge of an old VHS video tape right on the 5-degree dihedral line, on both sides. This gives you exactly a 1-inch space up to keep the 5 degrees of dihedral. Glue the dihedral joiners to the spars, and
glue in the wing mount plywood piece. Cut a 5-inch piece of trailing edge material, and this can also be glued in at this time, at the rear center of the wing. Hold everything to- gether with pins, and clamps.
In this step, as shown in Fig. 10, the final
pieces that join the wing together have been added. First of all, glue in the front wing mount, again making sure that it lays flat with the wing on the building board. Al- though not shown in the photo, add the two front wing mount gussets, which connect the dihedral joiner to the front wing mount. They should be placed ¾ inch from F1. When that has dried, glue in the upper wing joiner, in the front and in the rear. You will want to pin these parts in from
the side of the ribs, R1, to make sure these parts hold the upper curvature of the wing. Also, when that has dried, glue in the small oak pieces, which will be used later for screws to hold in the windshield. The corner wing gussets, shown on the
wing plan should also be added at this time. Seats: The seats are cut from 1-inch bal-
sa block, and because they are exactly a half-inch thick, both parts of the seats can be cut out, and then cut in half. Fig. 11 shows the seats completed.
Final finishing, wiring, and covering The wing should be put in position; then
drill through into the oak wood blocks. Tap to ¼–20 threads, so that the nylon wing bolts can be used. Sand all of the fuselage corners, and the front pine nose piece should be installed with 4–40 screws, and 4–40 blind nuts. Use the same size hardware for mounting the contra-rotating motor. You will have to carefully cut away the backside of the pine nose piece so it does not interfere with the rotating parts of the motor, as shown in Fig. 12. The landing gear should be secured with
#6 hardware, screws, and blind nuts. Mount the servos, and connect them to the micro control horns, although the control horns should be epoxied in place after covering. You remember that the rear servos are re- cessed into the fuselage, as shown in Fig. 13, so that they don’t protrude as much. You will be covering over them, except for the small lever arm that does come through.
Rita, a friend of the family, shows off the newly completed SkySport (at left) just prior to the maiden. Takeoffs (above) are a non event and are straight and true thanks to counter rotating props.
22 APRIL 2012
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