This paper discusses the static stability concepts of airplanes. The definition of static stability has not been systematically discussed. For example, although “Cmα < 0,” “C β < 0,” and “Cnβ > 0” are merely the aerodynamic criteria corresponding to each static stability, they are used just like the definition of static stability. Moreover, “flight path stability” is well known as the static st...

Cephalosporium stripe (fungus str ipe) is a vascular wi l ttype disease of wheat and barley, which also affects other cereals and grasses. l t is caused by the soifborne fungus Cephalosporium gramineum. ln autumn, the fungus produces millions of bacteria-sized spores (conidia), which are washed into the soil around the plant. These spores are the structures that will eventually infect the plant...

Developing a FWNAV is an ambitious and arduous tasks relying currently mostly on trial and error method. In order to assist these developments, a preliminary design tool evaluating the aeroelastic performance of a flapping wing is sound. Our approach, coupling a structural finite element solver to a quasi-steady aerodynamic model, is here reported along with some of its applications: the select...

Potential flow solvers for 3D aerodynamic flows are commonly used in industrial applications. Two main difficulties preventing the even more widespread use of these codes are the limitations on the number of discretization elements and the user expertise and effort required to specify the wake location. In the paper we present an automatic wake generation strategy for a potential flow solver, a...