Designing an aircraft without conventional control surfaces is of interest to aerospace community. In this direction, smart actuator devices such as synthetic jets have been proposed to provide aircraft maneuverability instead of control surfaces. In this article, a numerical study is performed to investigate the effects of unsteady suction and blowing oil airfoils. The unsteady suction and blo...

Orographically-induced gravity (buoyancy) waves can propagate through the tropopause to the stratosphere causing disruption to high altitude aircraft operations. High altitude turbulence (HAT) was first researched using U-2 aircraft in the mid-1960s and reported by Crooks (1965). He observed that HAT from mountain wave activity was more severe than turbulence associated with jet streams or conv...

This discussion paper is/has been under review for the journal Atmospheric Measurement Techniques (AMT). Please refer to the corresponding final paper in AMT if available. Abstract In this paper we report vertical profiles of CO 2 measured with a cavity ring-down spectrometer (CRDS, Picarro, Inc., 2301-m) on a research aircraft from near ground level to 8 km above mean sea level (a.m.s.l.). The...

Hiding from and surprising an opponent are tactics that have been used in warfare throughout history. They were features that aircraft originally possessed when they were first used in military operations. However, development of military technology is an endless struggle between advances in technology and counter technology. During World War II this struggle led to the development of a new tec...

A team was created to participate in the Mars Scout Opportunity. Trade studies determined that an aircraft provided the best opportunity to complete the science objectives of the team. A high fidelity six degree of freedom flight simulation was required to provide credible evidence that the aircraft design fulfilled mission objectives and to support the aircraft design process by providing perf...

This paper develops behavior models to analyze traveler propensity towards a new ‘‘very light jet”-based on-demand air service (ODAS), also labeled air taxi service, with the broader objective of providing guidance for the enabling stakeholders including business operators, policy-makers and aircraft manufacturers. The models predict the probability of individuals switching from their usual pre...

-There has been a great deal of excitement recently over the development of a theory for explicitly linearizing the input-output response of a nonlinear system using state feedback. One shortcoming of this theory is the inability to deal with non-minimum phase nonlinear systems. Highly maneuverable jet aircraft, such as the V/STOL Harrier, belong to an important class of a slightly non-minimum ...

The potential of condensation trails (contrails) from jet aircraft to affect regional-scale surface temperatures has been debated for years, but was difficult to verify until an opportunity arose as a result of the three-day grounding of all commercial aircraft in the United States in the aftermath of the terrorist attacks on 11 September 2001. Here we show that there was an anomalous increase ...

Aircraft is a complex structure, but a very efficient man made fly ing machine. An aircraft is a machine that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. It counters the force of grav ity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet. In this project the flu id–structure inte...

Abstract The problem of jet flow through the critical section a nozzle with central wedge-shaped body subsequent interaction wall and co-current atmospheric air is considered. structure gas-dynamic in vicinity channel at control points altitude range flight aircraft investigated.