Drag Coefficients of Low Altitude Stationary Flight Test Airship Estimated from Flight Tests

System Identification Approach for Determining Flight Dynamical Characteristics of an Airship from Flight Data

Low-altitude Unmanned Airship Photogrammetry System

Constrained by the satellites orbits, Satellite Remote Sensing is difficult to achieve timeliness requirements. General aerial manned aircraft Remote Sensing is always delayed by the bad weather. Compared with Unmanned aerial vehicles, unmanned Airship can fly more lower and slower and you can get more clearer image. So it is more suitable for large scale mapping and other engineering requireme...

Helicopter Rotor Airloads Prediction Using CFD and Flight Test Measurement in Hover Flight

An implicit unsteady upwind solver including a mesh motion approach was applied to simulate a helicopter including body, main rotor and tail rotor in hover flight. The discretization was based on a second order finite volume approach with fluxes given by the Roeand#39;s scheme. Discretization of Geometric Conservation Laws (GCL) was devised in such a way that the three-dimensional flows on arbi...

Helicopter pilot scan techniques during low-altitude high-speed flight.

INTRODUCTION This study examined pilots' visual scan patterns during a simulated high-speed, low-level flight and how their scan rates related to flight performance. As helicopters become faster and more agile, pilots are expected to navigate at low altitudes while traveling at high speeds. A pilot's ability to interpret information from a combination of visual sources determines not only missi...

Stress Analysis of Flight Vehicles under Flight Conditions

A method is presented for the stress analysis of flight vehicles under different flight conditions including gust and control surface deflection (or maneuver) using the governing equations of rigid-body motions and elastic deformations. The Lagrangian approach is used to derive the governing equations of motions. For this purpose, the basic equations of motions are derived in terms of potential...