Materials The materials used to construct an unmanned aerial vehicle are of critical importance to the performance, reliability, effectiveness and success of the objectives of the UAV. There are a variety of different materials available and each have differing advantages and disadvantages. There are a number of considerations that need to be made when choosing the right material for a particular UAV. These considerations include the objective and targets of the UAV, the budget of the owners and operators, the conditions and weather it will be subjected to, the flight time expected of it, the frequency of flight, the mass it is expected to carry and the speed at which it will fly (or indeed whether it will be intended to hover ie. A rotor craft as opposed to a fixed wing UAV). Our group have decided to concentrate on UAVs for archaelogical site mapping and analysis. Therefore it is likely that the UAV will be carrying cameras, sensors and possibly recording equipment which will make the UAV relatively heavy and possibly more cumbersome than a lighter UAV. Manoeuvrability may not be of as much importance as pay load and fuel capacity/ flight time capability. The weather and climatic conditions that the UAV will be subjected to is likely to be varied and is dependent on the geographical location of the archaeological site it will be mapping and scanning. Consideration must be given to the temperature, wind conditions, humidity and likeliness of precipitation and likelihood of lightening in the areas that it will be used. The materials chosen will need to be suitably capable of performing and indeed surviving in the conditions, whatever they may be. The availability and cost of the potential materials is perhaps the most import... ... middle of paper ... ...at any repairs, replacement or spare parts or components will be very high and will almost certainly over come any savings made in efficiency and fuel costs made due to the lightness of the material. The cost of the material initially will be high compared to aluminium and extremely high compared to the cost of wood or paper. A concern levelled at carbon fibre aircraft is their vulnerability to lightening strikes. Lightening can cause a catastrophic failure of the material resulting in major damage or even complete destruction of the aircraft. This will need to be a big consideration if the UAV that our group is researching is to conduct mapping and scanning of archaeological sites in areas prone or susceptible to lightening. The high cost would more than likely rule out carbon fibre as the main (or even complimentary) material for the UAV our group is researching.
Insulating Materials Introduction In this investigation I aim to find out which materials are the best insulators. This practical investigation involves investigating what kinds of materials are best at keeping water in a copper beaker warm. A material that prevents this heat loss is called an insulator. Insulators have to prevent three types of heat loss: · Conduction · Convection · Radiation Conduction - This is where heat energy passes through the walls of the copper beaker by
Expansion and Contraction of Materials When most materials are heated they expand and this increase their volume. One example of expansion is the fitting of the starter ring gear to the flywheel. The gear is heated until it expands sufficiently to pass over the rim of the flywheel, and when it is cool the gear tries to return to its original size, this gripping the flywheel with considerable force. All metals do not expand equally when heated through the same range of temperature, e.g. aluminium
Investigating Force and Materials For this investigation I will be testing various materials to determine how much force is required for them to snap. Figure 1 below shows the forces that will be acting upon the test material. [IMAGE] The set-up above will increase the force applied to the test material until a crack, started in the surface in tension, propagates to cause the material to break. To experimentally determine the level of stress that is required to break an object, I need
Safety Handling material by hand The insulated panels, while not particularly heavy, can be awkward to handle and carry, and the wind can catch them. Use good lifting techniques and body position when you lift or move the panels. Installation often requires working at unusual angles while accessing duct systems. Eye protection Making minor modifications to the panel system or routing out for the insulation can create airborne dust and particulates. Wear safety glasses with side shields (Z87-1)
Comparing Sources of Research Material The purpose of the assignment is to compare and contrast the source of research material available to a learner. We were first assigned to find a source from the Internet, and the second assignment was to find another source from the periodicals in the USCA library. This comparison will help each individual to determine the type of reading that benefits him or her the most. From these two sources, I learned a great deal of information about the different
Alternative Building Materials and Methods The buildup of past construction techniques up to our present point in time has denoted wood as being the first and foremost material used to build houses in the United States. Building codes prescribe wood to build homes, because of both its structural benefits and because it is ingrained in the industry as the material of choice. Because wood has been used for so long, it is the material that builders know best and are the most comfortable with
Materials Science and Engineering plays a key role in establishing and enhancing the innovations of sustainable development and serves as one of its most important foundations. The need to be creative and to think beyond the existing boundaries keeps material science engineering at the cutting edge of technology. I have been fascinated by the contents of material science and the applications that could be developed through its technologies such as carbon nanotubes. Other innovations include biomaterial
A composite material is made by combining two or more materials to give a unique combination of properties. The two constituents are reinforcement and a matrix. There are many types of materials that can be used for reinforced and matrix materials. The choice materials depend more upon required strength to weight ratio, stiffness and application. 3.1.1 Selection of fibre material as reinforcement material. The function of reinforcement is to improve the fracture toughness, high strength and stiffness
Relationship between Material – Design – Retail From above we understand the meaning of material but the relation between Material and Design is like what a key do to the lock. Materials selection is a central aspect of design in many cases materials represent the supporting step. It involves seeking the best match between the design requirements and the materials attributes. Materials play significant role in design beside the functional attributes, even the emotional and aesthetic qualities also
restorative materials, which depends on the microstructure and composition of material, the method of testing the fracture mechanism and the environment (20). The measurement of compressive and flexural strength is one of the methods to investigate the mechanical properties of restorations (21). Flexural strength is one of important characteristics of MTA. This property becomes more important when the MTA is placed under occlusive pressures, such as when MTA is used as pulpotomy material or direct
of magnetic materials The wide variety of magnetic materials can be sharply divided into three groups: Soft magnetic materials (easy to magnetize and demagnetize) Hard magnetic materials (hard to magnetize and demagnetize) Semi-hard magnetic materials The soft magnetic materials have the characteristic feature of high permeability, and it is chiefly this flux-multiplying power of magnetically soft materials that fits them for their job in machines and devices. Hard magnetic materials are made into
Composite materials is also called composition materials or shortened to composites. They may be selected to give unusual combinations of weight, stiffness, high temperature performance, strength, corrosion resistance, conductivity, or hardness. They are materials made from two or more constituent materials with significantly different physical or chemical properties. When combined, they produce a material with different characteristics from the individual components. The individual components will
is produced by mixing mercury along with silver, tin, copper, and zinc. Even though mercury is a toxic material when bounded to other metals it becomes stable and thus can be used in dental applications. The addition of Silver provides strength, Tin for workability, Copper for corrosion resistance and Zinc to prevent oxidation. One of the advantages of using silver fillings as a dental material is its durability. These fillings are able to last 10-15 years, which usually is much longer than other
1. Introduction The traditional material for aircrafts is aluminium while composite material content has always been less than 20% until the recent years. The latest aircraft models by Airbus and Boeing have composites content of 50% or more. (Mauricuien, n.d.) It has brought about many benefits to the industry but also causes difficulties in maintenance and safety issues. The drive of the material evolution is due the economic factors and higher expectation of society as technology advances. The
Investigation of the Cooling of a Liquid in Cups with Different Materials Aim: To investigate how a liquid cools down in cups with different materials. Prediction: The factors which will affect the amount of heat loss are: § Material of the cup – Conduction § Colour – Radiation § Surface area of cup § Amount of water (surface area:volume ratio) § If the cup has a lid or not – Convection and Evaporation § Room temperature § Thickness of the cup § Temperature of the liquid