7 CENTER SPAR: Cylindrical CENTER SPAR: Cylindrical spar wooden spar, measuring 1½″ dia. about 1½″ dia. at inner end, for half its length and tapering tapering to about 1″ dia. at to 1″ at its tip. (L.M. p. 204.) outer end. Located on upper Located on upper side of wing. side of wing. This center spar was reinforced (1) by an extra wooden member on the underside of the wing, which measured 1″ × 1½″ and extended to the 7th rib from the center of the machine; and (2) by another wooden reinforcement on the underside extending out about one-fourth of the length of the wing. 8 RIBS: Hollow box construction. RIBS: Most of the original (L.M. Plates 66, 67.) Langley box ribs were replaced with others made at Hammondsport. (Manly letter, 1914.) The Hammondsport ribs were of solid construction and made of laminated wood. That part of the rib in front of the forward spar was entirely omitted. 9 LOWER GUY-POSTS: A single LOWER GUY-POSTS: Four for each round wooden post for each pair pair of wings (see Fig. 4), two of wings (see Fig. 3), 1¼″ in of which were of streamline form dia. 6½″ long. (L.M. Plate 62, measuring 1¼″ × 3½″ × 54″ long; p. 184.) and two measuring 2″ × 2″ with rounded corners, 3′9″ long. 10 The front wing guy-post was The front-wing guy-posts were located 28½″ in front of the located directly underneath the main center spar. (L.M. Plate main center spar, 28½″ further 53.) rearward than in 1903. 11 The rear wing guy-post was The rear wing guy-posts were located 31½″ in front of the located directly under the main center spar. (L.M. Plate main center spar, 31½″ further 53.) rearward than in 1903. 12 UPPER GUY-POSTS: For each UPPER GUY-POSTS: For each pair pair of wings a single steel of wings, two streamline wooden tube ¼″ dia., 43″ long. (L.M. p. posts each 1¼″ × 3½″, 76″ long, 184, pl. 62.) forming an inverted V. (See Fig. 4.)