2013
Aerospace & Defense

Micro Air Vehicles (MAVs) are being developed by the U.S government for scientific and military operations like surveillance. The MAV’s can be used with spy-cameras, microphones and other sensors that can take pictures, videos and other useful scientific and biological information from people and places where humans (or the military) cannot reach. Presently Black hornet, Russian helicopter drones are heavy weight, rc-helicopters which carry out surveillance operation but are easily visible to naked eyes.

My idea is to design a small sized, high speed, low acoustics ornithroper MAV with a small spy camera and a dart gun or poison gun. The practical benefits of ornithroper are potentially improved efficiency by flapping wings, better maneuverability and reduced noise compared to ...

Design of underwater cum aerial quadrotor
The basic idea of having a quadrotor that can be used underwater and in air is to improve the operating environment of the quadrotor. The quadrotors can be coated from Ultra-Ever dry to make them superhydrophobic (which would make it effective underwater). When converting from quadrotor in air to quadrotor underwater, two of the adjacent rotors in the horizontal plane would be tilted by 90 degrees and become rotors in the vertical plane which would be used as thrusters. The rotors in the vertical plane then can rotate in vertical plane completely (360 degrees), perpendicular to the propeller axis .This is similar to the thrusters we have in space vehicle which can direct ...

The Gravity Development Board (GDB) will revolutionize the high-level prototyping experience and replace the Arduino Uno® as the peoples’ preferred microcontroller. Designed as a tool for developing hardware and software systems, the GDB is the first space tolerant, open hardware prototyping board that can sense and manipulate the environment. Its rich design capabilities will empower engineers, designers, and hobbyists to create in an environment limited only by their imaginations.

The GDB offers the similar functionality found in today’s microcontrollers, however; it deviates in its superior performance. It is up to forty times faster and sixty-three percent smaller than the leading board (Arudino Uno) today. Sol-X’s GDB includes integrated high power drivers capable of handling one hundred times the current, ...

The thrust of a solid propellant rocket depends directly upon the burning surface area of the solid grain. Therefore we try to modify the shape of the solid propellant grain to get the maximum surface area. This can be done by using a mathematical curve better known as a fractal curve.

Fractals are said to possess infinite detail. Thus theoretically, we could increase the inner burn surface area of the solid propellant to an infinite value. Thus for the first few seconds of burn, we could directly affect the burn rate of the solid propellant.

 Take the example of the Koch snowflake. The Koch snowflake can be constructed by starting with an equilateral triangle, then recursively altering each line ...

Variable Ammunition is not yet available. In making this statement, we want to elaborate on the concept of cartridge ammunition. Cartridge ammunition consists of modules that are composed of several components, such as: cartridge case, igniter, powder charge and bullet.

The new concept is to develop a completely new type of ammunition, utilizing the Carrier Cartridge and Projectile Carrier. The Carrier Cartridge is similar to conventional fixed ammunition; it has a cartridge case, a primer, and a powder charge. Unlike conventional fixed ammunition, the Carrier Cartridge has a Bullet Carrier. The Bullet Carrier contains the complete bullet, which can utilize any bullet type, i.e., Armor Piercing, High Explosive etc. This Bullet Carrier is pressed, as in conventional ammunition cartridges, ...

The subject invention relates to a mechanical geometric formula that allows universalizing and building rotary mechanisms, among them are combustion engines, hydraulic motors, air motors, air compressors or gas, and bombs and hidracrílicas vaco, etc.

This invention is efficient and low cost due to its unique simplicity in which it can be built with less than 7 parts.Their rotation is centric and their chambers are ...

The goal of this project is to build and test a kite powered electrical generator. Kites are being deployed successfully for powering large ships weighing 440 tons over long haul distances of nearly 12,000 miles.The success of these projects stems from the fact that the kite provides for a very large force and the ship provides the required displacement to produce power.If the ship were to stay stationary no power would be produced and the kite will follow a complicated figure eight motion to dissipate the wind energy. Extracting the energy out of the kite when the generation facility is stationary has stymied the researchers due to the fact that inevitably any stationary objects attached to a kite will ...

Overview

Gonioreflectometer is a device that measures bi-directional reflectance distribution function (BRDF). Large Goniometer encompasses three actuated axes to position its two payload platforms independently around the sample to perform that task. The first prototype of Large Gonioreflectometer is designed and built for York University’s Centre for Research in Earth and Space Science (CRESS) in Toronto, Canada.

This particular gonioreflectometer will be used to measure reflectance of grain size separates of meteorite powders at various illumination and viewing geometries. Measurements of samples that have been processed to simulate space weathering, thermal metamorphism, and aqueous alteration will also be taken. These measurements will then be compared to data returned from spacecraft observations of asteroids to determine their surface properties.

Design ...

The Problem: The technology to do the above already exists, but all the components of the system have to be utterly safe and reliable. One of the critical components in such a system is the servo-actuator that operates the controls of the vehicle, unmanned or not. Currently, the vast majority of servos represent a series of single-points-of-failure as described in Fig. 1.

To reduce the risk of critical function failure, some machines use redundant actuators – two or more devices that can perform the same function. The idea here is to provide triple redundancy within the actuator: 3 motors, 3 gear trains, and 3 sets of control electronics – each set capable of performing the whole function independently. ...

The boundary-layers that occur on wings of flying aircraft have both laminar and turbulent-flow regions. Laminar-flow starts at the leading-edge and is felt on the forward part of both wing surfaces. Depending upon the local Reynold's Number, the degree of free-stream turbulence, the surfaces’ curvature and their roughness, the boundary-layer flow will eventually change to being turbulent. The skin-friction drag of these surfaces depends on the way that boundary-layers grow and transit. The turbulent boundary-layer causes the greatest amount of local skin-friction and the postponement of the transition region to aft locations on both surfaces is a useful way to reduce the total drag.

The boundary-layer transition region can be delayed by stabilizing the Tollmien-Schlichting Waves, which are responsible ...

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