Typical
        four-channel airborne RC system goes into average- to larger-size model.
        Top: Aileron extension cable, switch harness, four servos. Bottom left:
        receiver. Bottom right: four-cell Ni-Cd rechargeable battery pack.
        Components weigh roughly 12 ounces; will fly 20- to 60-powered and
        medium to large electric-powered models.
Typical four-channel airborne RC system goes into average- to larger-size model. Top: Aileron extension cable, switch harness, four servos. Bottom left: receiver. Bottom right: four-cell Ni-Cd rechargeable battery pack. Components weigh roughly 12 ounces; will fly 20- to 60-powered and medium to large electric-powered models.