The paper investigates the unpowered descent of a rotor system through the upper
atmosphere. Axial and helical trajectories are investigated in the context of fixed points as …

Autorotation in a steady-state axial motion is investigated theoretically and experimentally. A
simplified model presents the major physical parameters affecting this phenomenon, giving …

A short cylindrical vehicle (the ratio of length to diameter is less than 2) equipped with an
outer/inner detector is developed, which is inspired by the Tennis racket theorem and …

Visibility-reduced monocopter is a single-winged rotorcraft involved with the concept of
invisibility due to the persistence of vision. While spinning, it is highly deceptive to human …

Purpose One of the challenges encountered in the design of guided projectiles is their
prohibitive cost. To diminish it, an appropriate avenue many researchers have explored is …

AN AUTOROTATING rotor operating as an aerodynamic decel-erator was first proposed by
Bensen in the 1940s {see Refs.[1, 2] for a historical summary}. Subsequently, autorotative …

The pararotor is a biology-inspired decelerator device based on the autorotation of a rotary
wing, whose main purpose is to guide a load descent into a certain planetary atmosphere …

The pararotor is a biology-inspired decelerator device based on the autorotation of a rotary
wing whose main purpose is to guide a load descent into a certain atmosphere. This paper …

The effects of different blade configurations on a vertically falling rotating blade decelerator
(pararotor) are studied. A pararotor model equipped with cambered plate blades with …

A theoretical and experimental study has been undertaken, under ESA contract, by a team
including GMV, the University of Bologna and EADS-Astrium, to assess the feasibility of an …