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On Overloading of the Aeroplane.
https://jaxa.repo.nii.ac.jp/records/35781
https://jaxa.repo.nii.ac.jp/records/357815c70ac6f-0be5-4ca7-bddf-76375ea4ad90
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA4415974.pdf (914.7 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
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| 公開日 | 2015-03-26 | |||||||
| タイトル | ||||||||
| タイトル | On Overloading of the Aeroplane. | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 著者 |
OGAWA, Taitiro
× OGAWA, Taitiro
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| 著者所属（英） | ||||||||
| en | ||||||||
| Member of the Institute | ||||||||
| 出版者 | ||||||||
| 出版者 | 東京帝國大學航空研究所 | |||||||
| 書誌情報 |
東京帝國大學航空研究所彙報 巻 64, p. 776-794, 発行日 1929-12 |
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| 抄録（英） | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | To establish a new record for duration or range, to succeed in flights across oceans, or to increase temporarily the radius of action or the offensive power of military aeroplanes, it often becomes imperatively necessary to overload an aeroplane beyond its normal total weight. If the aeroplane, however, be overloaded in these cases without due considerations to the limits of overloading, the start may turn out a failure. It is very regrettable to note in this concern the fatal accidents which befell some famous aviators in the start of the transatlantic flights, etc. The limits of overloading, at which an aeroplane can still be safely flown are here given in simple expressions, with the assumption that such overloading has been executed without altering the aerodynamic coefficients of the complete machine. The limits are also calculated for certain actual aeroplanes as example. An aeroplane can be overloaded, until the rate of climb becomes zero. The limit of overloading G_<max> is proportional to the 1/3th power of (c^3_a/c^2_w)_<max>, wing area, and air density, and to the 2/3th power of propeller efficiency and the engine power. The limit can be calculated using test data either from wind tunnel or from actual performance. In order to clear the obstacles near the aerodrome, we are obliged to determine the actual overloading much below the limit. For this purpose, the rate of climb of an aeroplane overloaded within the limit is given in a simple expression. Another limit imposed by the total weight, with which the take-off run tends to be infinite, or unreasonably long (say over 2km) is generally higher than the limit above given. Even if it is not the case, we can still overload an aeroplane up to the limit deduced from the climbing considerations, disregarding the second limit which can be raised to an extent by reducing the ground friction (a concrete runway) or by adopting an inclined runway. The radius of action of ordinary aeroplanes can be increased to 5-10 times the normal one, if we overload them to their limits, provided that the aerodynamic coefficients remain unchanged. The load factor is reduced by the ratio of 2.5 : 1 in the worst example. The flight of overloaded aeroplanes, therefore, must be carefully carried out in calm weather without resorting to abrupt manoeuvres. Actual overloaded flights up to this date were ventured with 73-97% of the theoretical limit of overloading corresponding to the rate of climb of 0.25-2.10m/s., and with the load factor 95-45% of the normal value. | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AN00162779 | |||||||
| 資料番号 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 資料番号: SA4415974000 | |||||||
