This paper highlights a novel approach to stabilizing and controlling pitch and yaw motion via a set of horizontal tail that can act as elevator and rudder. The tail is incorporated into a new design of blended wing body (BWB) aircraft, known as Baseline-V, located just aft of the trailing edge of its inboard wing. The proposed close-coupled tail is equipped with elevators that deflect in uniso...

We propose an architecture to harness the comparatively low computational power of geographically concentrated mobile devices (such as in a wireless ad hoc network, especially a sensor network) to build a wireless ad hoc lattice computer (WAdL). The primary contribution of the WAdL design is the ability to maintain, despite the mobility of the participating devices, a virtual lattice where the ...

An extensive experimental study is conducted to examine effects of different winglet-shapes and orientations on the vortex behind a wing, static surface pressure over the wing, and wing wake of a swept wing at various angles of attack. Four types of winglets, spiroid (forward and aft), blended, and winggrid are used in this investigation. Wing static surface pressure measurements are obtained f...

The objective of this work is to reshape a nacelle to achieve a specified nacelle pressure distribution. The nacelle may be either isolated or installed on an airplane. There are no restrictions on the attitude (toe, incidence, and roll) and position of the nacelle. The design algorithm is coupled to two different multi-block 3-D Navier Stokes flow solvers. The coupling between design and analy...

Partial spectral information associated with the smallest eigenvalues can be used to improve the solution of successive linear systems of equations, namely in the simulation of time-dependent partial differential equations, where at each time step there are several systems with the same spectral properties to be solved. We propose to perform a partial spectral decomposition with the BlockCGSI a...

We describe a distributed and collaborative environment for cooperative scientiic problem solving. SHASTRA is a highly extensible, distributed and collaborative design and scientiic manipulation environment. At its core is a powerful collaboration substrate { to support synchronous multiuser applications, and a distribution substrate { which emphasizes distributed problem solving. The design of...

Quad-plane is a popular type of electric vertical and takeoff/landing (eVTOL) vehicle that hybridizes quadrotor fixed-wing airplane. However, the mechanical simplicity quad-plane also makes it vulnerable to rotor failures. When complete fails, becomes physically impossible stop from fast yaw spinning, which further induces considerable abnormal aerodynamic forces moments on wing. In this paper,...

Microlight aircraft are increasingly becoming the most popular segment of private aviation. In the United Kingdom the majority (about 2500 of a total fleet of 3500) of these aircraft are of the weightshift class, also known as flexwings or trikes. This paper introduces the main issues involved in the design and operation of this class of aeroplane.

We describe a distributed and collaborative environment for cooperative scientiic problem solving. SHASTRA is a highly extensible, distributed and collaborative design and scientiic manipulation environment. At its core is a powerful collaboration substrate { to support synchronous multiuser applications, and a distribution substrate { which emphasizes distributed problem solving. The design of...