This paper summarizes and discusses some critical aspects of flying hypersonically. The first is the L/D (lift over drag) ratio determining thrust that in turn depends on slenderness Küchemann’s τ parameter. second parameter found to depend relative importance wave versus friction drag. Ultimately, all engineering drag argued vorticity formed at expense vehicle kinetic energy, thus requiring wo...

Public procurement has been regulated by (then) European Economic Community (EEC) secondary law since 1971. Substantive EU rules aim at enforcing non-discrimination in the internal market. To this end, they prescribe competitive and transparent award procedures contracting authorities or entities must follow to choose their partner. Remedies for breaches of substantive have object an early codi...