Faculty of Engineering Sciences and Technology

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    Aircraft Design
    (2015-07-14) Ondore, Faustin
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    Design and development of an experimental aircraft
    (2015-07-14) Ondore, Faustin
    A flying aircraft can be dangerous to operate. Airworthiness and safety issues must be fully addressed. A variety of designers and producers have taken the easy route by procuring and assembling suitable knock-down kits from which good 'home-made' aircraft have been produced. Many of such aircraft have are deployed in private leisure, sport and other categories. Production of experimental aircraft poses special challenges, because the resulting air vehicle must not only fly safely but be capable of supporting aerial experimental activities. In the present work, the university team's focal point is on the optimum balance of flight safety and effective achievement of the experimental missions. Hence we address such functions and capabilities as handling qualities, aerial photography and the multi-faceted system of aerodynamic data acquisition, on-board storage and retrieval. Further, all design calculations must mainly be produced from the designer's original concept and not imported from other sources. The team is unaware if a similar aerial vehicle has been produced, tested and used in such a stringent frame, in a university environment.
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    THE ENGINEERING PROFESSION IN KENYA
    (2015-07-14) Ondore, Faustin
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    FUNDAMENTALS OF FLUID DYNAMICS
    (2015-07-14) Ondore, Faustin
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    Quality improvement through microstructure control for superior machinability of cast irons
    (1998) Marwanga, Reuben O
    The purpose of this research was to study the influence of microstructure on chip formation and other machinability criteria for cast irons. It is recognized that machinability of cast irons is influenced by a complex interplay of graphite morphology and matrix structure. However, the effect of these microstructural variables on the measures of machinability of cast irons has not been adequately investigated. As a consequence the problem of variability in the machinability of this group of materials is not well understood. In this study, slow speed machining and the quick-stop device method were used to investigate the mechanism by which graphite morphology and the matrix structure influence the machining properties of cast irons. Furthermore, turning tests were used to study machinability as characterized by tool life, machining forces and surface roughness for these materials. Relationships between chip formation and other machinability criteria were then developed and analyzed. Finally, empirical models that relate machinability to microstructures for cast irons were developed. The study showed that chip formation and other machinability parameters for cast irons were influenced by both graphite morphology and matrix structure. In addition, the empirical models revealed that machinability of cast irons was not only influenced by microstructural variables but also by the interaction of the variables with cutting conditions.
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