| An Experimental Investigation of the Effects of Trailing-Edge Strips on the Unsteady Aerodynamic Forces on Tabs, |
MAR 1980 |
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| Authors:
G. Long; P. A. Farrell; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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 | A fairly common problem on new aircraft is that of achieving good control surface effectiveness. Often boundary layer thickness and interference from other surfaces may cause flow separation on all or part of the control. This reduces control efficiency and can cause serious problems in achieving good control of aircraft response. These types of problems are difficult to predict analytically or from wind-tunnel tests. Usually the first evidence of such ... |
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| An Evaluation of a Damped Vibration Absorber in Rough Seas, |
JUN 1978 |
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| Authors:
P. A. Farrell; G. Long; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| A damped vibration absorber has been fitted to HMAS Balikpapan and the responses of the ship and of the absorber were measured in rough seas. The effectiveness of the absorber is shown to be essentially the same as in calmer seas. Recommendations for tuning future absorbers on the basis of sea trials are made. (Author) |
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| Vibration Tests on Harbour Personnel Boat. |
APR 1978 |
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| Authors:
G. Long; C. M. Bailey; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| Excessive propeller shaft bearing wear has occurred on a series of 10 metre harbour personnel boats constructed for the Royal Australian Navy. An investigation of the problem revealed that the wear was caused by a high-order whirling mode of the shaft excited by propeller-hull interaction. It was not practicable to alter this whirling vibration significantly, but the wear rate was reduced to an acceptable level by changing the bearing materials. ... |
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| An Analysis on the Vibratiof Levels on the Bridge of H.M.A.S. Labuan in Rough Seas. |
FEB 1978 |
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| Authors:
G. Long; P. A. Farrell; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| The fore-and-aft vibration levels occurring on the bridge of H.M.A.S. Labuan in rough seas have been recorded and analysed. The results for the frequency range 0 - 10 Hz presented. (Author) |
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| Resonance Test on Nomad N22 Fitted with External Stores. |
JAN 1978 |
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| Authors:
G. Long; C. M. Bailey; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| A resonance test on the N22 Nomad, fitted with extenal stores, has been conducted. The natural modes and frequencies of vibration have been measured for two store configurations, in the frequency range up to 30 hertz. (Author) |
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| Sea Trials of a Damped Vibration Absorber on H.M.A.S. Balikpapan. |
JAN 1978 |
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| Authors:
G. Long; P. A. Farrell; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| Sea trials of a damped vibration absorber installed on a 550 tonne ship are described. The absorber was designed to increase the damping in the fundamental vertical bending mode of the ship. Vibration levels, as a result of wave action, were reduced by a factor of approximately six. (Author) |
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| The Design and Installation of a Damped Vibration Absorber, |
AUG 1977 |
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| Authors:
G. Long; P. A. Farrell; AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA)
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| The theory and operation of a vibration absorber, suitable for increasing the damping in the fundamental vertical vibration mode of a ship, are described. A design example is presented, illustrating the engineering application of the unit in a 550 tonne Landing Craft, and a method of turning the absorber, after installation, is given. (Author) |
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| Factors Related to Developing Instructional Information Sequences: Phase I. |
MAR 1974 |
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| Authors:
D. R. Dansereau; S. H. Evans; A. D. Wright; G. Long; T. Actkinson; TEXAS CHRISTIAN UNIV FORT WORTH
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| The report represents Phase I of a two phased research effort directed toward the development and implementation of an objective methodology for determining effective instructional sequences for technical training material. Technical concepts embedded within technical material were subjected to Inscal Multidimensional Scaling to determine the complexity and concept interrelationships of unrevised material, presently employed in three Air Force technical courses. Revision of the material according to different principles of sequencing ... |
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Reports by Author
