Escape strategies for turboprop aircraft in microburst windshear

Abstract

Worth, 2 August, 1985. Different escape strategies were tested using the flight performance characteristics of the U. S. Navy's P-3 "Orion" and T-44 "Pegasus" aircraft. The three flight phases investigated were approach to landing , takeoff, and the low altitude ASW mission. Results from the analysis were coupled with the pilot's view-point from which conclusions were drawn. The results of the analysis support a constant-pitch-angle escape procedure. The same procedural steps can be used for both aircraft in any configuration or situation with the difference being the degree ofpitch to employ. The conclusions are in a format for integrating specific microburst escape procedures within the NATOPS programs for the P-3 and T-44 aircraft. iii

Euler Solutions for Airfoils in Inhomogeneous Atmospheric Flows

“…Q n x ; Q n y / T pointing into the evaluation regime and the tangential vector t in counterclockwise direction are introduced.Then, the characteristic variables, which result from the product P ¡1 k N Q, can be written as With this notation, the characteristic equations in two-dimensional form can be derived from Eqs. (8) and (9), respectively, 33 @ @¿…”

“…9;14¡17 The parameters of the models have to be adapted to the measured data in real microbursts. In the eld of ight mechanics, problems like the optimal ight path, 18;19 possible escape strategies, 8 and aircraft performance 20 are treated. Concerning the interferencebetween the ow eld and the aircraft, apart from some fundamental studies, for example, those of Ruden, 21 Tsien,22 and Weissinger, 23 only a few investigations, mainly based on experimental work, 24;25 exist up to now.…”

Modeling and Simulation of China C Series Large Aircraft with Microburst

“…The transient variation in wind speed and direction will decrease the performance of an aircraft and result in flight accidents. This fact is acknowledged throughout both the aviation and meteorology communities, especially during takeoff and approach stages [4]. Since the late 1970s, a series of projects such as NIMROD and JAWS have been set up to research the characterization and hazards of wind shear using actually measured data and digital flight data records [1,[5][6][7].…”

“…However, the third one is merely an approximation of the vortex-ring model. In summary, a double-vortex-ring algorithm based on the vortex-ring model, according to [4], will be chosen to establish the wind field in this paper.…”

“…Next, we explain the influence of wind gradients upon the angular rates and motion of an aircraft. Then, a microburst wind field is built according to [4,15] and included in setting up a simulation platform. The results of experiments are used to explain the differences between the wind influence mechanisms in the two forms of equations.…”