The main objective of the common DLR/ONERA project MIRACLE is to harmonize the CFD activities and strategies of DLR and ONERA in order to better fulfil the future requirements of transport aircraft industry in Europe. The paper presents the most significant achievements of the co-operative activities, which have been focused on the following objectives: collaborative enhancement and industriali...

This paper studies the scaling of airplane dynamic response to stochastic wind gusts, with focus on the relationship between airplane size and airspeed variations. The results have applications in the design and control of small-scale aircraft for robustness with respect to turbulence. Using linearized equations of motion and the Dryden model of gusts, the paper presents analytical and numerica...

We use aircraft observations of carbon monoxide (CO) from the NASA ARCTAS and NOAA ARCPAC campaigns in April 2008 together with multiyear (2003– 2008) CO satellite data from the AIRS instrument and a global chemical transport model (GEOS-Chem) to better understand the sources, transport, and interannual variability of pollution in the Arctic in spring. Model simulation of the aircraft data give...

OBJECTIVE To determine the levels of sound to which infants are exposed during routine transport by ambulance, aircraft, and helicopter. DESIGN Sound levels during 38 consecutive journeys from a regional level III neonatal intensive care unit were recorded using a calibrated data logging sound meter (Quest 2900). The meter was set to record "A" weighted slow response integrated sound levels, ...

Transport noise is an increasingly prominent feature of the urban environment, making noise pollution an important environmental public health issue. This paper reports on the RANCH study, the first cross-national epidemiological study to examine exposure-effect relationships between aircraft and road traffic noise exposure and reading comprehension. 2,010, 9-10 year old children from 89 school...

Loss-of-Control (LOC) is a major factor in fatal aircraft accidents. Although de nitions of LOC remain vague in analytical terms, it is generally associated with ight outside of the normal ight envelope, with nonlinear in uences, and with a signi cantly diminished capability of the pilot to control the aircraft. Primary sources of nonlinearity are the intrinsic nonlinear dynamics of the aircraf...

Transport noise is an increasingly prominent feature of the urban environment, making noise pollution an important environmental public health issue. This paper reports on the 2001-2003 RANCH project, the first cross-national epidemiologic study known to examine exposure-effect relations between aircraft and road traffic noise exposure and reading comprehension. Participants were 2,010 children...

Advances in sensors and avionics computation power suggest real-time structural load measurements could be used in flight control systems for improved safety and performance. A conventional transport flight control system determines the moments necessary to meet the pilot’s command, while rejecting disturbances and maintaining stability of the aircraft. Control allocation is the problem of conv...