Results 61 to 70 of about 3,999 (214)
Interactional aerodynamics and acoustics of a propeller-augmented compound coaxial helicopter [PDF]
, 2008 The aerodynamic and acoustic characteristics of a generic hingeless coaxial helicopter with a tail-mounted propulsor and stabiliser have been simulated using Brown's Vorticity Transport Model.
Brown, Richard +3 more
core
A beginner's guide to infrastructure‐less networking concepts
IET Networks, Volume 13, Issue 1, Page 66-110, January 2024.Infrastructure‐less networks connect communication devices end‐to‐end by managing links and routes independent on fixed networking facilities, relying on dedicated protocols running on end‐user devices. The authors describe the different networking concepts of infrastructure‐less networks by looking at the main properties, common applications, ongoing ...
Anna Förster +7 more
wiley +1 more source
DETERMINATION OF OPTIMAL AZIMUTH FOR MOUNTING ULTRALIGHT COAXIAL HELICOPTER BLADES
Advanced Engineering Research, 2011 The possibility of reducing vibration of the ultralight coaxial helicopter blades on the through harmonic wave by mounting blades on the optimal azimuth is shown.
Vitaly V. Dudnik, Vladimir A. Kolot
doaj
Journal of Engineering, Volume 2024, Issue 1, 2024.In recent years, multirotor unmanned aerial vehicles (MRUAVs) have seen increased investment and deployment for various novel uses, including intruder surveillance, agro farming, and crack detection in severe environments. An identical line of inquiry motivates this work, which aims to better use MRUAVs for agriculture.
Beena Stanislaus Arputharaj +10 more
wiley +1 more source
DETERMINATION OF OPTIMAL AZIMUTH FOR MOUNTING ULTRALIGHT COAXIAL HELICOPTER BLADES
Вестник Донского государственного технического университета, 2018 The possibility of reducing vibration of the ultralight coaxial helicopter blades on the through harmonic wave by mounting blades on the optimal azimuth is shown.
Vitaly V. Dudnik, Vladimir A. Kolot
doaj
Aeroacoustics of a coaxial rotor in level flight [PDF]
, 2008 The aeroacoustic characteristics of a coaxial system with teetering rotors in level forward °ight are com- pared to those of an equivalent articulated single rotor with the same solidity.
Brown, R.E., Duraisamy, K., Kim, H.W.
core +1 more source
Design of a Ballistically-Launched Foldable Multirotor [PDF]
, 2019 The operation of multirotors in crowded environments requires a highly reliable takeoff method, as failures during takeoff can damage more valuable assets nearby.
Bouman, Amanda +5 more
core +2 more sources
Aerodynamic Optimization Design of Duct Body Structure for Coaxial Rotor Unmanned Aerial Vehicles
International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.With the rapid development of vertical takeoff and landing aircraft, urban air traffic has gradually attracted people’s attention. The lift system is a key technology in the composition of vertical takeoff and landing aircraft systems. Due to its compact structure, low noise, safety, and reliability, the ducted lift body has been widely used as a ...
Du Siliang +3 more
wiley +1 more source
Power Flow Analysis of the Main Reducing Gear of Coaxial Counter-rotating High-speed Helicopter
Jixie chuandong, 2018 A mechanism scheme of main reducing gear of coaxial counter-rotating high-speed helicopter is studied,and a rapid evaluation on the gear power flow for designers is provided.
Zhang Shifei +4 more
doaj
Aluminium Feeds for Reflector for NadirSAR [PDF]
, 2018 With the long term aim of developing a NadirSAR quadrotor UAV system specialized for monitoring broad acre grain fields, a large aperture load bearing antenna to use as the main structural element was sort.
Gray, Derek, Le Kernec, Julien
core +1 more source