K. Kimura

TL;DR: In this article , a hovering rotor was investigated with low-fidelity tools and compared against state-of-the-art CFD simulations, and the results showed that the chosen flight condition is close to the thrust of the maximum Figure of Merit and that the vortex-triggered separation on the outboard sections of the blade has to be modelled correctly.

TL;DR: In this article , a flight demonstration of the feasibility of an optimal rotor blade designed by JAXA for high-speed helicopters and the single-rotor lift-off technology using flap differentials on the fixed-wing is reported, conducted using a 1/7 scale model helicopter named HARIOS.

TL;DR: In this article , the effect of the compressibility on aerodynamic characteristics and flow fields of a Mars helicopter rotors under Martian atmospheric conditions was investigated, and it was shown that the effect increases with increasing pitch angle, whereas compressibility effects result in no reattachment and reduced aerodynamic performance.

TL;DR: In this article , the authors discuss the change in forward flight performance and its mechanism when a sweep angle is added to the rotor blades of a high-speed helicopter, based on the results of CFD (computational fluid dynamics) analysis.