Vertical flight performance of Lighter-than-Air free hot-air balloons is derived and discussed. Novel mathematical model using lumped-parameters has been used to balloon dynamics steady-state in particular. Thermal was not treated as the super-heat under control aeronauts/pilots. Buoyancy or gross lift, net effective specific excess lift were for a general single envelope can be applied hot-air...

The flying fish (family Exocoetidae) is an exceptional marine flying vertebrate, utilizing the advantages of moving in two different media, i.e. swimming in water and flying in air. Despite some physical limitations by moving in both water and air, the flying fish has evolved to have good aerodynamic designs (such as the hypertrophied fins and cylindrical body with a ventrally flattened surface...

In our work we examine a high-dimensional, massive flow data set around an airfoil using a topology-based vortex analysis. The 3D time-dependent flow depends on two additional parameters which are introduced by an active flow control technique aiming at increasing the lift by periodic blowing and suction. In particular, we study the influence of the actuation parameters frequency and intensity ...