| 4 | main wing spars, 3/4 by 1-1/4 in. by 17 ft. |
| 2 | rudder spars, 3/4 by 1 in. by 8 ft. |
| 8 | wing crosspieces, 3/4 by 3/4 in. by 4 ft. |
| 4 | rudder crosspieces, 1/2 by 1/2 in. by 2 ft. |
| 1 | piece for main-frame crosspieces, 1/2 by 1 in. by 12 ft. |
| 2 | arm pieces, 1-1/2 by 2 in. by 3-1/2 ft. |
The following list of poplar pieces is required in making the supports for the cloth covering on the wings and rudders.
| 34 | main-wing ribs, 1/4 by 3/4 by 64 in. |
| 8 | rudder ribs, 1/4 by 1/2 by 36 in. |
| 5 | rudder ribs, 1/4 by 3/4 by 48 in. |
The following list of oak pieces is needed:
| 1 | piece, 5/8 by 1-1/4 in. by 12 ft. | |
| 1 | piece, 5/8 by 1-1/4 in. by 6 ft. | |
| 1 | piece, 3/4 by 3/4 in. by 3-1/2 ft. | |
| 2 | pieces, 5/8 by 1-1/2 in. by 5 ft. | |
| 4 | pieces, 3/4 by 1 by 28 in. |
In addition to the lists given, four pieces of bamboo, 16 ft. long, tapering from 1 or 1-1/4 in. at the large end to 3/4 in. at the small end, are used for the main frame.
Monoplane Glider in Flight
Construction
The first part to make is the main frame A which is constructed of the four bamboo poles. They are made into a rectangular frame with crossbars marked B cut to the right length from the 12-ft. piece of spruce, 1/2 in. by 1 in. The bars C and D are of oak cut from the 6-ft. piece, 5/8 in. by 1-1/4 in. All of these crossbars are fastened together in rectangular form by means of stove bolts. The bamboo poles are then bolted to the inner corners of the frames with 3/16-in. bolts. Place the bolts through the bamboo close to a joint to prevent splitting. The frame is then rigidly trussed by diagonal wires marked E crossing all rectangles. The wire used for trussing all the parts throughout the glider is piano wire, 16 gauge. The arm pieces are bolted to the sides of the rectangular frames beneath the wings.