Results 81 to 90 of about 2,332 (184)

Conceptual Design and Performance Analysis for a Large Civil Compound Helicopter [PDF]

, 2012
A conceptual design study of a large civil compound helicopter is presented. The objective is to determine how a compound helicopter performs when compared to both a conventional helicopter and a tiltrotor using a design mission that is shorter than ...
Johnson, Wayne, Russell, Carl
core   +1 more source

Unified Accurate Attitude Control for Dual-Tiltrotor UAV with Cyclic Pitch Using Actuator Dynamics Compensated LADRC. [PDF]

Sensors (Basel), 2022
Wang Z, Wang Y, Cai Z, Zhao J, Liu N, Zhao Y.   +5 more
europepmc   +1 more source

Estimation Method for Basic Parameters of High-Speed Vertical Take-Off and Landing Aircraft

Aerospace
The research aims to propose a basic parameter estimation method for high-speed vertical take-off and landing (HSVTOL) aircraft, balancing rotor and fixed-wing mode requirements.
Yu Wang, Qihang Li, Pan Li
doaj   +1 more source

Numerical Simulation on Aerodynamic Characteristics of Transition Section of Tilt-Wing Aircraft

Aerospace
The tilt-wing aircraft has attracted widespread attention due to its excellent performance. However, its aerodynamic characteristics during the tilt transition section are characterized by unsteadiness, nonlinearity, and strong coupling, making it ...
Qingjin Huang, Guoyi He, Jike Jia, Zhile Hong, Feng Yu   +4 more
doaj   +1 more source

Technology needs for high speed rotorcraft (3) [PDF]

The spectrum of vertical takeoff and landing (VTOL) type aircraft is examined to determine which aircraft are most likely to achieve high subsonic cruise speeds and have hover qualities similar to a helicopter.
Conway, Scott, Detore, Jack
core   +1 more source

Flight Dynamics Modeling and Dynamic Stability Analysis of Tilt-Rotor Aircraft

International Journal of Aerospace Engineering, 2019
The tilt-rotor aircraft has often been proposed as a means to increase the maximum speed of the conventional helicopter. The tilt-rotor aircraft consists of three primary flight modes that are the helicopter flight mode in low forward speed flight ...
Ke Lu, Chunsheng Liu, Chunhua Li, Renliang Chen   +3 more
doaj   +1 more source

Application of Climate Impact Metrics to Civil Tiltrotor Design [PDF]

, 2013
Multiple metrics are applied to the design of a large civil tiltrotor, integrating minimum cost and minimum environmental impact. The design mission is passenger transport with similar range and capacity to a regional jet.
Johnson, Wayne, Russell, Carl R.
core   +1 more source

Medical drones: Disruptive technology makes the future happen. [PDF]

Unfallchirurg, 2021
Sigari C, Biberthaler P.
europepmc   +1 more source

A self-powered vibration sensor for real-time vibration monitoring and aeroelastic instability detection in tiltrotor aircraft transition

AIP Advances
Flight safety in a tiltrotor aircraft is highly sensitive to vibration-induced instabilities during transition between vertical and horizontal flight modes.
Chengxiao Li, Yonggang Yang
doaj   +1 more source

Sensitivity Analysis for Design Parameters of Electric Tilt-Rotor Aircraft

Aerospace
In recent years, there has been rapid development in electric aircraft, particularly electric vertical takeoff and landing (eVTOL) aircraft, as part of efforts to promote green aviation.
Yu Wang, Wenyuan Ma, Zhaolin Chen
doaj   +1 more source