This paper investigates the capability of the Extended Projected Profile (EPP) trajectory down-link definition to facilitate air-ground trajectory synchronisation. It will be demonstrated that the EPP allows for practically unambiguous description of aircraft intent, but that unknown aircraft performance characteristics such as climb thrust derate, anti-ice and tail-specific drag adjustments ca...

This paper presents a new nanolubricant for the intermediate gearbox of the Apache aircraft. Historically, the intermediate gearbox has been prone for grease leaking and this natural-occurring fault has negatively impacted the airworthiness of the aircraft. In this study, the incorporation of graphite nanoparticles in mobile aviation gear oil is presented as a nanofluid with excellent thermo-ph...

This paper focuses on strong propeller effects in a full six degree-of-freedom (6DOF) aerodynamic modeling of small UAVs at high angles of attack and high sideslip in maneuvers performed using large control surfaces at large deflections for aircraft with high thrust-to-weight ratios. For such configurations, the flight dynamics can be dominated by relatively large propeller forces and strong pr...

Given a compact n-manifold Σ with a flat conformal structure, there is a canonical procedure for constructing an associated (n + 1)-dimensional de Sitter spacetime homeomorphic to Σ× (0,∞); we call these standard de Sitter spacetimes. Our main theorem is a classification of compact de Sitter manifolds; it asserts that every de Sitter spacetime which is a small regular neighborhood of a closed s...

A quasi-tailless flight investigation was launched using the X-31A enhanced fighter maneuverability airplane. In-flight simulations were used to assess the effect of partial to total vertical tail removal. The rudder control surface was used to cancel the stabilizing effects of the vertical tail, and yaw thrust vector commands were used to restabilize and control the airplane. The quasi-tailles...

(21) App1_ NO_; 14/068,235 A micro aerial vehicle capable of controlled transitory or _ sustained gliding ?ight. The vehicle includes a fuselage. A (22) Flled: 0d“ 31’ 2013 pair of articulated Wings are forward of a center of gravity of Related US Application Data the vehicle, the Wings being articulated and having trailing _ _ _ _ edge ?aps, and having actuators for controlling the dihedral (6...

This paper deals with the experimental assessment of aerodynamic characteristics an innovative large turboprop aircraft. The configuration is a three-lifting surfaces airplane rear engine installation at tail tips, conceived to carry up 130 passengers and targeting minimum economic environmental impact, which competitive regional jets on short medium hauls. layout output previous research made ...

The harmonic oscillator in anti de Sitter space(AdS) is discussed. We consider the harmonic oscillator potential and then time independent Schrodinger equation in AdS space. Then we apply the supersymmetric Quantum Mechanics approach to solve our differential equation. In this paper we have solved Schrodinger equation for harmonic oscillator in AdS spacetime by supersymmetry approach. The shape...

We propose that the entropy of de Sitter space can be identified with the mutual entropy of a dual conformal field theory. We argue that unitary time evolution in de Sitter space restricts the total number of excited degrees of freedom to be bounded by the de Sitter entropy, and we give a CFT interpretation of this restriction. We also clarify issues arising from the fact that both de Sitter an...