This paper presents some recent validation results with velocity-based source BEM analysis program as applied to prediction of cavitation on rudder and podded propellers. The RANS solver is also applied to modelling of the rudder behind the propeller and the both BEM and RANS numerical predictions are compared with the experimental data. An example of prediction of cavitation on podded propelle...

All-Electric power and propulsion system architectures have been investigated in order to demonstrate the feasibility of such an approach to increase the endurance of a high altitude long endurance UAV to a target mission duration of 1 week. System modelling studies demonstrate the possibility of utilising combined fuel cell and photo-voltaic systems as power sources for an electric distributio...

Kodo Ito is an engineer with Mitsubishi Heavy Industries, LTD and is a visiting researcher staff with Kinjo Gakuin University. He received the BS and the MS degrees (Physics) from Yamagata University in 1983 and 1985, and the DR degree from Aichi Institute of Technology in 1999. His research interests include the optimal operation and maintenance policies of large and complicated systems such a...

From Wright Brothers 1903 to present day 2003, aeronautical technology has made a profound progress. This paper demonstrates the outcome of this progress in weight, wing area, and engine thrust in three categories of transport aircraft of short to long range, regional jets, and turbo-prop commuter aircraft. Also the paper includes those aircraft with distinct jump in aeronautical technology. Fe...

The Ffowcs-Williams and Hawkings acoustic analogy is utilized to reconstruct the signature of two marine propellers with without winglets at tip their blades. database from a large-eddy simulation study exploited conducted on computational grid consisting about 5 × 10 9 points. results this demonstrate that tip-loading propeller successfully improves its performance in terms thrust efficiency p...

Dynamic soaring, a technique in which horizontal wind that varies in strength or direction is used to support flight, could potentially support perpetual flight of a high performance glider in the jet stream. However, the aircraft's control systems would still require electric power. This could be extracted for example using specially designed ram air turbines (RAT). The present paper focuses o...