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Full-Text Articles in Navigation, Guidance, Control and Dynamics
Long And Short-Range Air Navigation On Spherical Earth, Nihad E. Daidzic
Long And Short-Range Air Navigation On Spherical Earth, Nihad E. Daidzic
International Journal of Aviation, Aeronautics, and Aerospace
Global range air navigation implies non-stop flight between any two airports on Earth. Such effort would require airplanes with the operational air range of at least 12,500 NM which is about 40-60% longer than anything existing in commercial air transport today. Air transportation economy requires flying shortest distance, which in the case of spherical Earth are Orthodrome arcs. Rhumb-line navigation has little practical use in long-range flights, but has been presented for historical reasons and for comparison. Database of about 50 major international airports from every corner of the world has been designed and used in testing and route validation. …
General Solution Of The Wind Triangle Problem And The Critical Tailwind Angle, Nihad E. Daidzic
General Solution Of The Wind Triangle Problem And The Critical Tailwind Angle, Nihad E. Daidzic
Aviation Department Publications
A general analytical solution of the navigational wind-triangle problem and the calculation of the critical tailwind angle are presented in this study among other findings. Any crosswind component will effectively create a headwind component on fixed course tracks. The meaning of a route track is lost with excessive crosswinds representing the bifurcation point between the possible and the impossible navigational solutions. Any wind of constant direction and speed will effectively reduce groundspeed and increase time-of-flight on closed-loop multi-segment flights. Effective wind track component consists, in general, of true and induced components. The average groundspeed of multiple-leg flights is a harmonic …