Detailed and precise measurements of aerosol chemical and physical properties are necessary in order to understand formation processes and assess environmental impacts so thatcost-effective control strategies can be formulated. sulfate aerosol is of particular concern due to its involvement in acid… More

Wind farm designers require an operational tool to design optimal wind farms on sites with irregular terrain and nonuniform wind flows. such sites will be more important asthe wind farm density increase in the most windy areas, flat sites become unavailable, and reduced tax credits make careful… More

The high cost and vulnerability of manned aircraft is generated renewed interest in the employment of remotely piloted vehicles (rpvs) for a wide range of missions. aero-vironment inc. proposes the development of a basic design for state-of-the-art rpv training systems applicable to a wide range of… More

The performance of remote piloted vehicles (rpv's) can be significantly improved by passive devices for controlling the turbulent boundary layer. these devices range from surface devices for drag reduction to vortex generators for separation control. currentlythere is little application of these… More

The potential for using composite materials in constructing space station environments appears to be desirable due to the substantial payload weight savings of polymer composites, as compared to moving more conventional materials from earth. in the hostile environment of space, joints must be highly… More

Measurement of wind and turbulence by remote sensing to a height of at least one kilometer above ground level has become well established. such systems are known as doppler acoustic sounding systems (dass) or sound detection and ranging (sodar). these systems utilize sound at relatively low… More

Dispersing sonar buoys over a two-dimensional ocean area would be facilitated if some of the buoys would glide perpendicular to the flight path of the dispensing airplane. to develop the technology for this lateral flight, a program is proposed which, after our inter-actions with the sponsor on… More

To augment the stealth features of the submarine, innovative methods of minimizing the observables due to the surface piercing mast are proposed. observation techniques include visual (eyball from surface or air) electro-optic (tv) and radar from surface, air or space. observables in the optical… More

There is a military requirement for lightweight rapid deployable, easily transportable, and rugged unguyed towers for c3 systems. for los mm radio systems, wind induced angular deflections at the top are severely restricted by precision sighting requirements. a fundamental analysis of stress… More

There is no accepted preliminary design method for high altitude, long endurance (hale) vehicles. important to nasa, sdio and all branches of dod, they all have very long spans, very light wing loading, and very large fuel/propulsion fractions. most configurations are partial span-loaders, thus… More

There is a need to improve the efficiency of propellers for existing and future uav systems. propeller pitch control provides a very effective means of achieving good performance over a wide range of flight conditions and is the method utilized by conventional active systems. for lightweight uav… More

There is a requirement for effective methods to mitigate wind induced vibration in antenna structures. these vibrations cause distortion in the signal. current antenna structures are constructed from frp tubing because of its benign electromagnetic properties but the material, because of its low… More