Dot Marks the Spot To mark the center-of-gravity balance points on the wings of your model airplanes, first run a piece of 1-inch-wide low-tack tape along the wing where it meets the fuselage. Then measure the prescribed distance from the wing’s leading edge and make a mark on the outer edge of the tape. At that mark, stick an adhesive-backed door bumper to the wing and then remove the tape. The bumper is easy to...
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