In the history of aircraft development, maneuverability has always been an important consideration in the design concept of aircraft. The requirements for aerodynamic characteristics are reflected in high lift-to-drag ratio, high lift coefficient, torque stability and so on. The occurrence of dynamic stall will lead to a sharp drop in lift and a rapid rise in drag, resulting in torque oscillation, which seriously restricts the improvement of aircraft performance, and even leads to aircraft crash in severe cases. The traditional passive flow control cannot cope with the real-time and changeable flow field environment, and the emergence of jet control provides a new way to solve the problem of dynamic stall. Although the research of single jet technology has been relatively sufficient, there are few comparative studies on steady jet and synthetic jet, and there is also a lack of related research on dual synthetic jets. Therefore, it is imperative to fill this research gap.

Operating drones across air and water boundaries poses serious aerodynamic risks due to complex gas-liquid flow interactions. A new finite vortex rotor model developed by researchers in China provides unprecedented insight into how rotors behave near free water surface. The study introduces a predictive boundary that separates safe and unsafe flight zones, offering a powerful tool for the design and control of aerial-aquatic rotorcraft.

A research team from York University in Canada has proposed a revolutionary Dyson-Harrop CubeSat design, capable of harvesting high-density energy from the solar wind using the photoelectric effect. This compact and lightweight system delivers much greater power density than conventional photovoltaic technologies, opening up new possibilities for clean and sustainable space energy applications.

To reduce the vibration of the coaxial helicopter main transmission system considering both level and vertical flight conditions, a vibration evaluation and optimization model was built. A vibration simulation model and a vibration evaluation method was established. A hybrid Gravitational Search Algorithm-Simulated Annealing (GSA-SA) algorithm was combined to balance convergence speed and searching accuracy. The principle test was conducted to prove the accuracy of theoretical method. The optional results show that the vibration of the optimized transmission system decreases significantly, in which the maximum reduction of key vibration indicators reaches more than 20%. The proposed method could be extended to other fields.

Propeller-driven aircraft are gaining renewed attention for sustainable aviation. Yet balancing efficiency with noise reduction remains a critical challenge—especially for emerging platforms such as eVTOL and hybrid-electric aircraft. Researchers from Nanjing University of Aeronautics and Astronautics have developed a new optimization framework based on the unsteady adjoint method that successfully addresses this trade-off. Their work offers a powerful tool for designing quieter, more efficient propellers, paving the way for the next generation of low-emission, low-noise aviation.

Aero-engine hot-end components face grinding challenges due to superalloys' low thermal conductivity, causing high heat, energy consumption, and reliance on unsustainable cooling. Ultrasonic vibration-assisted grinding (UVAG), heat pipe grinding wheels (HPGW), and minimum quantity lubrication (MQL) have been proposed to integrate to reduce heat generation, enhance heat dissipation, and minimize coolant use. In this case, the high-efficiency and sustainable grinding can be achieved with improved surface integrity.

Budhi: A Journal of Ideas and Culture Vol. 27 No. 2 explores the healing power of philosophy through diverse perspectives—ranging from ancient Stoic and Socratic traditions to modern reflections on public space and health during the COVID-19 pandemic. This issue includes articles on the philosophical roots of counseling, medieval Arab efforts to calculate Earth’s circumference, and the overlooked impact of architecture on mental well-being. It also features a call for dialogue between science and religion, a special lecture on Aristotle’s views on women and Greek tragedy, and a review of Florangel Rosario Braid’s inspiring autobiography. Together, these works illuminate how philosophy can expose and ease the sources of human suffering by expanding our capacity for reflection, dialogue, and ethical action.