Manuscript/Mixed Material Article by Alexander Graham Bell, June 1903
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Image 1 of Article by Alexander Graham Bell, June 1903 THE NATIONAL GEOGRAPHIC MAGAZINE Vol. XIV JUNE, 1903 No. 6 CONTENTS PAGE THE TETRAHEDRAL PRINCIPLE IN KITE STRUCTURE. BY ALEXANDER GRAHAM BELL. ILLUSTRATED 218 APPENDIX OF SEVENTY ILLUSTRATIONS OF KITES AND STRUCTURES…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 2 of Article by Alexander Graham Bell, June 1903 THE NATIONAL GEOGRAPHIC MAGAZINE AN illustrated monthly, published by the National Geographic Society, at Washington, D. C. All editorial communications should be addressed to the Editor of the National Geographic Magazine, Corcoran…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 3 of Article by Alexander Graham Bell, June 1903 THE NATIONAL GEOGRAPHIC MAGAZINE THE TETRAHEDRAL PRINCIPLE IN KITE STRUCTURE * By Alexander Graham Bell President of the National Geographic Society * A communication made to the National Academy of Sciences in…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 4 of Article by Alexander Graham Bell, June 1903 220 Of course in other respects the two cases are not identical. A kite sustained by a 20-mile breeze possesses no momentum, or rather its momentum is equal to zero, because it…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 5 of Article by Alexander Graham Bell, June 1903 221 States were established a few years ago equipped with the Marvin kite. Continuous meteorological observations at a great elevation have been made at the Blue Hill Observatory in Massachusetts, and Mr…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 6 of Article by Alexander Graham Bell, June 1903 222 wind, increasing the head resistance without counterbalancing advantages. TRIANGULAR CELLS IN KITE CONSTRUCTION In looking back over the line of experiments in my own laboratory, I recognize that the adoption of…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 7 of Article by Alexander Graham Bell, June 1903 223 general model as the Hargrave Box Kite, but with triangular cells instead of quadrangular, seem to fly as well as the ordinary Hargrave form, and at as high an angle. Such…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 8 of Article by Alexander Graham Bell, June 1903 224 diminish with each increase in the size of the compound kite. Unfortunately, however, the conditions of stable flight demand a considerable space between the front and rear sets of cells (see…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 9 of Article by Alexander Graham Bell, June 1903 225 we arrive at the form of cell shown at B, in which the framework forms the outline of a tetrahedron. In this case the aeroplanes are triangular, and the whole arrangement…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 10 of Article by Alexander Graham Bell, June 1903 226 kite, or kite having the form of a tetrahedron. The kite shown in figure 14 is composed of four winged cells of the regular tetrahedron variety (see Fig. 10), connected together…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 11 of Article by Alexander Graham Bell, June 1903 227 FIG. 16—TETRAHEDRAL KITES A. A WINGED TETRAHEDRAL CELL B. A FOUR-CELLED TETRAHEDRAL KITE C. A SIXTEEN-CELLED TETRAHEDRAL KITE D. A SIXTY-FOUR-CELLED TETRAHEDRAL KITE- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 12 of Article by Alexander Graham Bell, June 1903 228 result is undoubtedly correct. His conclusion, however, is open to question, because he has drawn a general conclusion from restricted premises. He says: “Let us make two flying-machines exactly alike, only…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 13 of Article by Alexander Graham Bell, June 1903 229 by the multiplication of smaller kites into a cellular structure the results are very different. My own experiments with compound kites composed of triangular cells connected corner to corner have amply…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 14 of Article by Alexander Graham Bell, June 1903 230 aeroplane surfaces form substantially two pairs of wings, arranged dragon-fly fashion. FIG. 19—AERODROME KITE IN THE AIR The whole framework for the boat and wings is formed of tetrahedral cells having…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 15 of Article by Alexander Graham Bell, June 1903 231 ⅜ inch diameter) made an angle with the horizon of about 45° when the rope snapped under the strain. Tremendous oscillations of a pitching character ensued; but the kite was at…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 16 of Article by Alexander Graham Bell, June 1903 232 Plate I- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 17 of Article by Alexander Graham Bell, June 1903 233 Plate II- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 18 of Article by Alexander Graham Bell, June 1903 234 Plate III- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 19 of Article by Alexander Graham Bell, June 1903 235 Plate IV- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 20 of Article by Alexander Graham Bell, June 1903 236 Plate V- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 21 of Article by Alexander Graham Bell, June 1903 237 Plate VI- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 22 of Article by Alexander Graham Bell, June 1903 238 Plate VII- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 23 of Article by Alexander Graham Bell, June 1903 239 Plate VIII- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 24 of Article by Alexander Graham Bell, June 1903 240 Plate IX- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 25 of Article by Alexander Graham Bell, June 1903 241 Plate X- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 26 of Article by Alexander Graham Bell, June 1903 242 Plate XI- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 27 of Article by Alexander Graham Bell, June 1903 243 Plate XII- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 28 of Article by Alexander Graham Bell, June 1903 244 Plate XIII- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 29 of Article by Alexander Graham Bell, June 1903 245 Plate XIV- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 30 of Article by Alexander Graham Bell, June 1903 246 Plate XV- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 31 of Article by Alexander Graham Bell, June 1903 247 Plate XVI- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 32 of Article by Alexander Graham Bell, June 1903 248 NOTES ON THE PRECEDING ILLUSTRATIONS By Alexander Graham Bell Copyright, 1903, by the National Geographic Magazine Plate I.— 1. Cellular framework for body of Multicellular Giant Kite. Although not built up…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 33 of Article by Alexander Graham Bell, June 1903 249 stages in the process of construction: 1. Tetrahedral cell employed in making the framework of the wind-break. 2, 3. and 4. The wind-break in process of construction. Plate V.— 1. Wind-break…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 34 of Article by Alexander Graham Bell, June 1903 250 three of its five faces covered. The open spaces between the cells are tetrahedral in form. 4. Kite shown in No. 3 flying with its rectangular side up. 5. Kite shown…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01
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Image 35 of Article by Alexander Graham Bell, June 1903 251 The spaces between the sets are not sufficient to constitute the kite a good flyer. The sets of cells interfere with one another. Plate XIV.— 1. Multicellular kite having 6 sets…- Contributor: Bell, Alexander Graham
- Date: 1903-06-01