With the increases in fuel costs due to the depletion of the world oil reserves and the increase of greenhouse gasses as a consequence to using oil as a fuel many companies are looking to new and innovative ways to power their aircraft. One of these new ways to power an aircraft is using fuel cells powered using hydrogen and oxygen, thus producing nothing but water vapour and small amounts of nitrogen dioxide as well as trace amounts of other emissions. Both Boeing (1) and Politecnico di Torino (2) have shown that it is possible to build an all-electric aircraft powered by fuel cells. Both flights used small, two-seater aircraft and a constant between them was the loss of the co-pilot seat due to weight and lack of space. As this paper will deal with a commercial aircraft a primary concern is the cargo and passenger capacity and whatever impact switching propulsion system has on these.

This thesis has been performed at BAE Systems Hägglunds, which is located in Örnsköldsvik. Hägglunds has a wide background of engineering, where they have manufactured all from airplanes to lifting cranes. Currently they only produce track vehicles at Hägglunds, where they manufacture the CV90 and BVS10 models. This thesis concerns the BVS10 which is an all-terrain-vehicle. The main purpose with the BVS10 is to enable transportation of material and personnel thru tough terrain.

Navtech är en internationell leverantör av flygoperationella produkter. Det här examensarbetet utfördes på en av deras produktionsavdelning som kallas Aircraft Performance, i Stockholm. Arbetet består av framtagning av en manual till en mjukvaruprodukt. Produkten är ett program som beräknar och presenterar flygprestandainformation för start och landning. Programmet tillhandahålls med två användarmanualer, Userguide och Prepages.

Today we live in a world where the demands increase in the aeronautics industry. This creates a situation where no mistakes are allowed about the regulations and for those who are supposed to follow these. Safety comes first, tracking of components, Service Bulletins which are recommendations from the manufactures and Airworthiness Directives which are demands from the authorities, these need to be updated at all time and everything that is done on a aircraft need to be documented.This creates a situation where today maintenance shops need to have full control of all parts of the organization, which creates a need for a working data system.The goal with this exam work is to evaluate the best way to implicate the new bought data system called "System Aircraft Management" on the basis of the needs of Täby Air Maintenance AB. The system are supposed to get started technically and also be implicated to the users of the system. This work will be focused to create a effective working plan to get SAM implicated with no interruption in the daily work.

The SK 60 Aircraft has been a workhorse for the Air Force?s training of future pilots since the late 1960s. The aging SK60 aircraft is going out of style, and the system has merely a few years of total running time left. A replacement for the SK 60 needs to be implemented in the coming years, and the Armes Forces Flying School has been commissioned to conduct flight tests on suitable replacement systems. This study will conduct a system analysis of two aircrafts mentioned in the Flying Schools report.

For research purposes Saab has developed a generic mathematical model denoted VEGAS of an aircraft with a configuration similar to JAS 39 Gripen. Today parts of Gripen backup control system are used also for VEGAS making the system subject to both corporate and defense secrecy. The main objective of this master thesis is to design, verify and implement public pitch axis flight control system for VEGAS. Furthermore, simplifications regarding the design process is to be examined. Design of pitch axis flight control system for the entire flight envelope has been carried out.

Presently Sjöfartsverket do their maintenance according to a standard program, which means that every maintenance task will be done when the task limit occurs. This leads to a very long downtime for the aircraft in some occasions and very short downtime in others. The goal with this work is to reach a higher regularity of the aircraft operation. To reach a higher regularity for the operational needs, this work will present a hypothetic better maintenance concept for Swedish Maritime Administration. The concept is based on equalized maintenance structure, which means that every maintenance occasions are meant to take the same time to perform.

Syftet med uppsatsen är att undersöka, jämföra och diskutera eventuella faktorer till varför det har skett en så kraftig ökning av helikopterhaverier under de senaste tio åren jämfört med stridsflygshaverier. Problemet belyses och analyseras utefter ett MTO- perspektiv (människa, teknik och organisation). Stor vikt i uppsatsen läggs på de haverirapporter som är en följd av haverier mellan 1997 ? 2007. Organisationsförändringar, flygmaskiner och utbildning är exempel på några andra delar som också behandlas.

Urban operations is one of the most difficult challenges a modern army can be tasked with. These challenges have been studied in history and present with various perspectives, but rarely from a combat engineering point of view. The purpose of this thesis has been to study the urban capabilities of a Swedish combat engineer company by examining if it can perform similar combat engineering fieldwork that supported the basic capabilities mobility, defence and effect in Operation AL FAJR, Fallujah Iraq 2004. These are the capabilities a Swedish engineer company are primarily designed to support in urban operations.For example, the study of Operation AL FAJR has shown that fieldwork supported mobility with breaching minefields, obstacles, walls and doors. Defence by creating defensive positions and obstacles.

AbstractSAAB has for a long time used user controlled pilot models in ARES. ARES is a simulation tool used in the desktop environment for simulations and calculations of the JAS 39 Gripen fighter and other aircraft. ARES stands for ?Aircraft Rigid body Engineering Simulation?. To work with these pilot models has been both time-consuming and inefficient.

Stockholms vattenskärning AB in Kungsängen has through the acquisition of a company begun to design and produce aircraft heaters whose origin is early 1970s which follows a high inefficiency in terms of energy consumption and size.The aircraft heater, which is sold worldwide, serves its purpose for customer satisfaction and has done so ever since it was developed in the 70s.Stockholms vattenskärning AB is now investigating the possibility in making the aircraft heaters more efficient, both in terms of energy consumption but also on a more efficient design with the belief that it would lead them to an edge in the market. The aircraft heater consists of several main components whose function altogether is to keep passenger aircrafts warm while they are on the ground.This project has been limited to the further development of the heat exchanger package which accounts for the conversion of the hot medium to the fresh air being carried in to the aircraft cabin. Work has been divided into different phases in order to create a better understanding of the project range and to make it easier to divide the various elements in the time available, 10 weeks. These phases are literature review, situation analysis, concept generation, CAD, concept comparison and writing reports.After the initial literature review was made, a fundamental theory was written which is essential in understanding the remaining parts of the project.With the theoretical part as support, measurements and calculations were made on the current heat exchange package in a situation analysis to ensure its operation and efficiency.In the concept generation phase, the collected facts from the literature review was used as the basis for creating a matrix. The purpose of the matrix was to indicate the two most suitable types of heat exchangers to develop four new concepts out of.In the CAD phase the four concepts was drawn up and then described with text and images.The last phase is the concept comparison where a concept selection matrix is used to function as a decision basis for further production at Stockholms vattenskärning AB. The four concepts have been developed based on the current heat exchanger and is gradually changed into a design of a cross-flow heat exchanger constructed out of stainless sections. The purpose of this is to have gradual upgrading of the heat exchanger as an option, in order not to saturate the market..

Sweden is one of five nations in the world manufacturing fighter aircrafts. Highly advanced technology is needed in order to develop a fighter aircraft. When developing advanced technology, new applications, other than those initially intended occur, spin-off. Some of Sweden?s largest companies are spin-offs from the fighter aircraft industry.

A study of communication content, frequency and problems was performed at the Swedish Air Force Air Combat Simulation Centre, FLSC. The purpose was to investigate the connection between team communication and performance variables, to study communication problems during air combat and to employ and develop the PILOT method of communication problem analysis. Ten fighter pilots and four fighter controllers engaged in simulated air combat beyond visual range in teams on two sides, Blue and Red, with four pilots and one fighter controller each. Eight such training runs lasting 15 to 25 minutes were analyzed with regard to the Blue team?s communication during launch situations, i.e.

The aim of this thesis was to answer a number of questions about the environmental consequences of aircraft de-icing. A further aim was to suggest how the environmental consequences due to the release of de-icing fluids can be measured and reduced.The main impact of the aircraft de-icing on the environment is due to the large oxygen demand for the degradation of glycol based de-icing fluids which are released in the environment. The effect of the increase in oxygen demand depends on where the degradation occurs in the ecosystem. In a sensitive ecosystem, the large demand of oxygen could provide an anaerobic environment which would be harmful for many types of organisms.In order to reduce the negative effects of the applied de-icing fluid, there is some type of collection system at every regular airport in Sweden. The methods of collection can be divided into two general groups, hydrological isolation or vacuum sweeper trucks.

The major part of the existing research on psychological effects on participating in war or residing in a war zone shows negative effects on the person?s mental health. However not all research, from an international perspective, shows the same results. Since we haven?t found any research regarding Swedish conditions and there has been a recent implementation of a decision from the Supreme Commander regarding commanded international service for all staff within the Swedish armed forces, the question has now become more relevant.