The article discusses density altitude which reportedly affects aircraft and engine performance. It states that Illinois pilots must understand its effects despite living in an area wherein density altitude is not an issue. Changes in air density will reportedly cause changes in the aerodynamic forces...
Limited work has focused on the impact of transient change in the density of air to lift, drag and moment coefficient acting on the aircraft fuselage during flight. This paper is aimed at determining how the unsteadiness in the density of air influences the aerodynamic performance of an aircraft...
As such, they are under selective pressure to minimise the time spent gaining altitude in thermal updrafts. Birds should be able to maximise their climb rates by maintaining a position close to the thermal core through careful selection of bank angle and airspeed, however, there have been few ...
Atmospheric data are collected for a 14 km altitude range, recorded as shot sums for 30 m height bins and 280 m along-track bins. Cloud-based ground detection flags are derived in the atmospheric data products ATL04 and ATL09 and tell us whether the Earth’s surface is ...
This paper deals with the design of a high power-density, high efficiency and low torque ripple propulsion motor for electric aircraft. The proposed design procedure resulted in a high-performance propulsion motor intended for a direct-drive solution on aAhmed Hebala...
However, when the Mach number is high, the performance of the engine does not change much with the change in flight altitude because the aircraft enters the stratosphere, where the incoming air temperature does not change much. Furthermore, since the total temperature and turbine pressure ratio ...
evaluate plant health. The NDVI and plant density results can be used to suggest where new plants can be added and to provide proper maintenance to achieve proper functions within the GSIs. This study provides a framework for evaluating plant performance within the GSIs using the collected UAV-...
The plant density of soybean is a critical factor affecting plant canopy structure and yield. Predicting the spatial variability of plant density would be valuable for improving agronomic practices. The objective of this study was to develop a model for
For the fixed hyper-parameters 𝑵N and 𝛾𝑅γR at the given flight altitude 𝐻0H0, the parameter 𝑨A is optimized and solved. With the boundary layer distortion prediction model as the constraint, the optimal solution 𝑨∗A∗ of the parameter 𝑨A to be calibrated is an ...
The LiDAR acquisition was conducted at a flying speed of 3 m/s and an approximate altitude of 55 m above ground, using the Terrain Follow mode within the DJI Pilot 2 flight control software (version 1.1.5; DJI, Shenzhen, China). The vertical and horizontal beam divergences were recorded ...