The integration of unmanned aircraft into the national airspace system requires new methods of ensuring collision avoidance. For unmanned aircraft a capability to ‘detect-and-avoid’ is required to replace the traditional ‘see-andavoid’ performed by pilots. The initial results from testing a Mobile Aircraft Tracking System (MATS) show that this ground-based radar system can track a ScanEagle unm...

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...

Heat and mass transfer in a permeable fabric system used for Personal Protective Equipment (PPE) was investigated using hot air jet impingement conditions to mimic the jet exhaust of Short Take-Off and Vertical Landing (STOVL) aircraft. The STOVL aircraft uses a thrust-vectoring nozzle of the jet engine and a lift fan in order to vertically land and take off a short runaway. The jet engine exha...

The multifractal characteristics of return signals from aircraft targets in conventional radars offer a fine description of dynamic characteristics which induce the targets’ echo structure; therefore they can provide a new way for aircraft target classification and recognition with low-resolution surveillance radars. On basis of introducing the mathematical model of return signals from aircraft...

Demand for lower fuel consumption, more power and improved reliability keeps engine manufacturers constantly renewing their market offerings. Simultaneously, the growing number of aircraft models on the market, due to both the emergence of the very light jet (VLJ) segment and the numerous derivative designs aircraft makers are marketing, demands an ever expanding range of engines. In its busine...

However, aviation biofuels are not just a lobbying gimmick. Oil and biotech companies, airlines and aircraft manufacturers, government agencies (particularly in the US) and venture capitalists are investing large sums into research and development of biofuels for aircraft. Recent test flights have shown that biofuel use in aviation is technically possible. Two types of aviation biofuels are in ...

A IR or atmospheric pollution problems have increased many fold during the past few decades. Air pollution and its control have grown t o become factors of tremendous importance to the economy and health of many industrialized and urbanized communities. Air pollution has been defined as the excessive concentration of foreign matter in the air which adversely affects the well being of the indivi...

Motivated by a real application, we consider the following aircraft scheduling problem. At any time, the aircraft are at diierent locations or are serving a customer and new customer requests arrive, each consisting of a departure location, departure time and destination. Additionally, if a customer request consists of more than one trip, there may be an exclusive use of the aircraft between th...

Background: There is a growing need to reduce significantly the noise generated by high-performance, supersonic military aircraft. The noise generated during takeoff and landing on aircraft carriers has direct impact on shipboard health and safety issues. Also, noise complaints are increasing as communities move closer to military bases or when there are changes due to base closures and realign...