Xem 1-3 trên 3 kết quả Francis rose
  • The introduction of the technology for bonded composite repairs of metallic airframe structures could not have come at a more opportune time. Today, many countries are facing the challenge of aging aircraft in their inventories. These airframes are degrading due to damage from fatigue cracking and corrosion. Repair with dependable techniques to restore their structural integrity is mandatory. The concept of using bonded composite materials as a means to maintain aging metallic aircraft was instituted in Australia approximately thirty years ago....

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  • Acoustic fatigue is due to a very high intensity excitation as a result of pressure waves caused by either engine or aerodynamic effects. Acoustically-induced cracking has occurred on the external surface of the lower nacelle and aft fuselage skins on the F/A-18, as illustrated in Figure 19.1. In the former region, overall sound pressure levels greater than 170dB have been measured in flight [l]. These high sound pressure levels appear to be a result of an aerodynamic disturbance at the inlet lip....

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  • The events recounted in this book group themselves in the main about a single figure, that of Count Frontenac, the most remarkable man who ever represented the crown of France in the New World. From strangely unpromising beginnings, he grew with every emergency, and rose equal to every crisis. His whole career was one of conflict, sometimes petty and personal, sometimes of momentous consequence, involving the question of national ascendancy on this continent. Now that this question is put at rest for ever, it is hard to conceive, the anxiety which it wakened in our forefathers.

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