An issue of concern in aging aircraft is the growth of multiple cracks emanating from a row of fastener holes, typically in a pressurized aircraft fuselage lap splice. This multisite damage (MSB), or widespread fatigue damage, if allowed to progress, can suddenly become catastrophic. The understanding of the failure behavior dictates the level of compromise between safety and economy. The compl...

Measurements have been made cf the yaw-dam@g derivative, n A.R.9 jet-flap ccm$ete model, SI' a*; using the free-oscillation technique. experimental apparatus and procedure are fullydescribtd, with the exception of the special air-bearing support system, which has been the subject of a previcus Repcrt. Results are given cf damping i,leasurements at wing incidence9 of Oc, qOc and 20' with jet-fla...

Corrosion has an important effect on the structural integrity of aging aircraft components, and an automatic and effective method of corrosion detection and classification can help to ensure the safe operation of a transportation system. Pulsed eddy current (PEC) has been shown to effectively characterize hidden corrosion in aircraft fuselage lap joints. However, two noise sources in the form o...

A survey has been made of the available literature on the aerodynamic loads associated with the external carriage of pylon-mounted stores adjacent to wing-fuselage combinations. The existing methods for estimating the store/pylon loads at both subsonic and supersonic speeds are reviewed with some indication of their accuracy, range of validity and the extent to which they have been verified exp...

Interior noise and sonic fatigue are important issues in the development and design of advanced subsonic and supersonic aircraft. Conventional aircraft typically employ passive treatments, such as constrained layer damping and acoustic absorption materials, to reduce the structural response and resulting acoustic levels in the aircraft interior. These techniques require signi cant addition of m...

European aircraft industry demands for reduced development and operating costs, by 20% and 50% in the short and long term, respectively. Contributions to this aim are provided by the completed project POSICOSS and the running follow-up project COCOMAT, both supported by the European Commission. As an important contribution to cost reduction a decrease in structural weight can be reached by expl...

This paper presents a computational investigation of a tangential slot blowing conccpt for generating lateral control forces on an aircraft fuselage forcbody. The effects of varying both the jet width and jet exit velocity for a fixed location slot are analyzed. This work is aimcd at aiding rrscarchcrs in designing future experimental and compm tational models of tangential slot blowing. The pr...