Aeronautical Engineering

The development of transport vehicle has influenced the development of human society. Indeed we have shortened the time of travel as well as expanded the distance of travel. Nonetheless, demand for transportation is expected to significantly increase on all modes. Transport industries that provide services for people and goods will make up a broad sector of national economics. In comparison to other transportations on land, railway systems operate exclusively due to its non-accessible operation by other type of modes along the track. Another notable factor is the fact that these vehicles travel with much less friction and tends to utilize energy far more efficiently in the end. In order to fully accommodate this vast railway transportation mode through underwater, tunnels manufacturing technology such as Immersed Tube Tunnel has been constructed and proposed around the world. This type of tunnel must perform without plausible structural failure and deterioration within its service life design. The research carried out in this paper outlines the structural and vibrational analysis of the undersea tunnel. The ultimate goal of this research is to study the structural analysis of the proper undersea tunnel for railway systems through finite element method analysis. This may lead to exploring the vision of what future transportation model should look like, leading to the conclusion that such underwater tunnel project is feasible to be applied through combinations of existing products and technologies in Indonesia.

In this paper, one studies the non-linear flight simulation of a  ighter military aircraft using ADMIRE. The ADMIRE model describes a generic small single seated, single engine fighter aircraft with a delta-canard configuration. The ultimate goal of building this ADMIRE model was to use the Generic Aero-Data Model (GAM), developed by Saab AB, as a basis and construct a complete aircraft model for use in the research simulator. The secondary goal was to provide the research community with an unlimited model that could freely be distributed. Modeling carried out in this research concludes the six parameters of the aerodynamic coefficients. The mathematical equations involving the flight parameter conditions as well as its trim conditions become the basis in determining the particular aerodynamic coefficients.

Since the first launch of a satellite in 1957 (Sputnik 1) the number of objects orbiting around Earth has increased. Today this number is estimated around five thousand, many of them being not operative, and so not controllable in any way. For the last fifteen years, the space communities have proposed different ways to reduce these numbers. One of these is the Active Debris Removal (ADR). Starting from this problem, this paper aims at proposing a new methodology to reduce the number of debris, using ADR technology. This will be done by studying a mission with the aim of removing five debris in one year to a dead orbit with lifetime of 25 years. This paper will consider all the aspects of the mission from the launch to the end of life of the satellite. The debris will be removed using expendable foam to increase the area of the debris and decrease their burn time. Finally, the study of costs and risks associated with the mission will be presented. This new approach is feasible and potentially offers new ways to reduce the number of debris in orbit. This will increase the safety of today's operating satellites for telecommunication, navigation and military purpose. This will also make future missions possible. At the end, there is a feasibility study of a magnetic ADR technology. This strategy is not possible nowadays, but with the improvements in the next 10 years, it could become one of the best ways to remove space debris.

How much fuel is needed for a transatlantic flight? What are the resulting emissions, and how can they be addressed? In this report a quantitative analysis is made by using flight manufacturer data and method for calculating total fuel consumption is given. Furthermore an analysis of noise and emission and both possible short term and long term solutions are proposed.

par la suite. Les rrsultats suggrrent que manquer/l 6tudier de tels paramrtres exprrimentaux ne pourrait foumir aucune amelioration significative/t la durabilit6 des joints adhrsifs et donc foumir une impression trompeuse des qualitrs favorables des agents de pontage en organosilane.

Failure modes of polyuretbane/aiuminium oxide joints primed with hydropbilic macromolecules T. Sugama, L.E. Kukacka and N Carciello (Brookhaven National Laboratory, USA) The use Of a near-monolayer thickness of poly(itaconic acid) macromolecule primer significantly improves the durability of bonds in polyurethane-aluminium oxide joint systems exposed to hot alkaline solutions. In those joints that failed on exposure, the cause was cohesive failure in the polyurethane-poly(itaconic acid) mixed regions. The use of other water-soluble primers, such as poly(vinylpyrrolidone), poly(acrylamide), and poly(styrenesulphonic acid) was less effective. It is concluded that the failure of the exposed joints is due to the hydrolysis of the polyurethane-primer mixed layer adjacent to the aluminium oxide.

Failure modes of polyuretbane/aiuminium oxide joints primed with hydropbilic macromolecules T. Sugama, L.E. Kukacka and N Carciello (Brookhaven National Laboratory, USA) The use Of a near-monolayer thickness of poly(itaconic acid) macromolecule primer significantly improves the durability of bonds in polyurethane-aluminium oxide joint systems exposed to hot alkaline solutions. In those joints that failed on exposure, the cause was cohesive failure in the polyurethane-poly(itaconic acid) mixed regions. The use of other water-soluble primers, such as poly(vinylpyrrolidone), poly(acrylamide), and poly(styrenesulphonic acid) was less effective. It is concluded that the failure of the exposed joints is due to the hydrolysis of the polyurethane-primer mixed layer adjacent to the aluminium oxide.

Failure modes of polyuretbane/aiuminium oxide joints primed with hydropbilic macromolecules T. Sugama, L.E. Kukacka and N Carciello (Brookhaven National Laboratory, USA) The use Of a near-monolayer thickness of poly(itaconic acid) macromolecule primer significantly improves the durability of bonds in polyurethane-aluminium oxide joint systems exposed to hot alkaline solutions. In those joints that failed on exposure, the cause was cohesive failure in the polyurethane-poly(itaconic acid) mixed regions. The use of other water-soluble primers, such as poly(vinylpyrrolidone), poly(acrylamide), and poly(styrenesulphonic acid) was less effective. It is concluded that the failure of the exposed joints is due to the hydrolysis of the polyurethane-primer mixed layer adjacent to the aluminium oxide.