This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...Third, there is the "two-way" field, which has two sufficiently long runways at right angles to each other. A two-way field is very much better than a one-way field, inasmuch as you can always head within 45 of the wind, whereas in a one-way field an extreme case would be 90. Moreover, two-way fields, such as the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...Third, there is the "two-way" field, which has two sufficiently long runways at right angles to each other. A two-way field is very much better than a one-way field, inasmuch as you can always head within 45 of the wind, whereas in a one-way field an extreme case would be 90. Moreover, two-way fields, such as the crescent-shaped field at Dayton, Ohio, sometimes permit of almost universal direction of flight. The two-way field may be crescentshaped, T-shaped, or L-shaped. An L-shaped field should have each arm 200 by 300 yd. Under certain conditions there may be buildings located inside or outside the angle which do no harm aside from creating eddies in case of strong wind. A T-shaped field should also have its arms 300 by 200 yd. in size. Regarding the size of fields it can be said that, while the JN-4 machine will rise off the ground after a run of 100 yd. or so, a field of this length is of course not big enough for frequent use, especially if bordered by trees, telegraph lines, fences, and so forth. A field for temporary use should be at least 200 by 200 yd., about 9 acres. If obstructions at the edges are more than 5 ft. high add to this 200 yd. a distance equal to twelve times the height of the obstruction. For a permanent field 300 yd. is the minimum dimension necessary for clearing obstacles and must be increased if the trees exceed 50 ft. in height. This minimum dimension assumes hard ground and the possibility of starting in any direction. Training fields are % mile square or more. Whatever field is used either temporarily or permanently by the pilot should be absolutely familiar to him over every inch of its surface. The adjacent country should also be absolutely familiar to him from the standpoint of possible forced landings which he ma...
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Seller's Description:
Good. Red bonded leather boards with gilt lettering. Slight shelf wear, rubbing at egdes, now protected in thick plastic jacket (easily removed/replaced). Pages/boards clean, NO foxing or markings, binding sturdy. Very Clean Copy-Over 500, 000 Internet Orders Filled.
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Seller's Description:
Very Good. Size: 8x5x1; Small octavo. 3rd impression. Original red cloth, gilt lettering to spine and front board. Rubbing, slight chipping to tail of spine. Ownership stamps of noted transportation safety engineer and inventor, Charles Adler Jr.
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