Abstract
A method will be described which allows for a uniform approach to determine the specific energy demand of aeroplanes and other vehicle systems. By the introduction of a dimensionless figure, it can be used for comparison irrespective of the very dissimilar definitions. The entity ε, well known from the physics of flight, the glide number—i.e. the inverse of the L/D-ratio in Anglo-American literature—proves to be a convenient starting point.In order to utilise the primary energy demand as a basis for comparison, further factors have to be taken into consideration and expressed as efficiency levels, as is usual in energy sciences. By doing this, a deep insight will be gained into the different physical and technical elements of transportation processes. Some unexpected results are derived. In particular, the role of the aeroplane has to be adjusted substantially with respect to public opinion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
