Iodotrifluoromethane (CF3I) has been considered to be a candidate replacement for bromotrifluoromethane (CF3Br), which is used in aircraft for fuel inerting and for fire fighting. In this study, the chemical effects of aircraftreleased CF3I on atmospheric ozone were examined with the University of Illinois at Urbana-Champaign two-dimensional chemical-radiative-transport (UIUC 2-D CRT) model. Us...

Since the introduction of large jet-powered transport aircraft, the majority of these vehicles have been designed by placing thrust-generating engines either under the wings or on the fuselage to minimize aerodynamic interactions on the vehicle operation. However, advances in computational and experimental tools along with new technologies in materials, structures, and aircraft controls, etc. a...

This paper reports the latest development of several techniques for adaptive flight envelope estimation and protection system for aircraft under damage upset conditions. Through the integration of advanced fault detection algorithms, real-time system identification of the damage/faulted aircraft and flight envelop estimation, real-time decision support can be executed autonomously for improving...

The Impact Dynamics Research Facility (IDRF) is a 240-ft.-high gantry structure located at NASA Langley Research Center in Hampton, Virginia. The facility was originally built in 1963 as a lunar landing simulator, allowing the Apollo astronauts to practice lunar landings under realistic conditions. The IDRF was designated a National Historic Landmark in 1985 based on its significant contributio...

The travelling population is increasing globally year on year. International tourist arrival figures reached 1087 million in 2013 and 1133 million in 2014; of which 53% and 54% respectively accounted for air transport. The water on board aircraft is sourced from surface or ground water; piped to a central filling point and distributed to each aircraft by water service vehicles at the home base ...

This paper develops a multi-information source formulation for aerospace design under uncertainty problems. As a specific demonstration of the approach, it presents the optimization under uncertainty of an advanced subsonic transport aircraft developed to meet the NASAN 3 goals and shows how the multi-information source approach enables practical turnaround time for this conceptual aircraft opt...

Introduction onsidering the remarkable developments in many high technology fields during the past few decades, it is surprising that virtually no change in the speed of commercial air transportation has occurred since the introduction of the Boeing 707 in the late 1950s. Instead, the aging Concorde continues to fly at supersonic speeds for an extremely limited market and all other commercial a...

Recent investigations of cosmic ray primaries and secondaries at aviation altitudes in the Earth’s atmosphere include the study of Z≥2 particles along the London-New York flight routes on supersonic aircraft. Preliminary charge spectra will be presented for these nuclei and comparisons will be made with the predictions of cosmic ray transport models in the Earth’s atmosphere.

There are numerous parameters that influence the availability of long range aircraft. In order to develop models evaluating aircraft availability, an understanding of these parameters, along with the corresponding metrics, is required. An analysis of historical data for a modern long range transport aircraft shows that unscheduled organizational-level maintenance and depot maintenance are the l...