نتایج جستجو برای: aircraft propellers
تعداد نتایج: 25958 فیلتر نتایج به سال:
The Serindit V-2 is a flying vehicle (UAV) that was successfully developed to participate in the Indonesian Flying Robot Contest with mission fly at high speed and acceleration. purpose of this research obtain optimum aerodynamic performance propeller its effect flight Unmanned Aerial Vehicle (UAV). study began by testing propellers (static thrust value, time consumed, power consumed) different...
The purpose of this paper is the evaluation aero-propulsive effects on a UAV wing model with distributed propulsion. An array three propellers placed ahead leading edge rectangular flap. investigation was performed high-fidelity numerical analyses to provide insights into phenomenology and screen interesting positions be validated in wind tunnel. propellers’ moved twelve different positions, al...
There have been many advancements in the field of aerospace and avionics. Scientists have increasingly started to focus on VTOL (vertical take off and landing) aircrafts. We have built a miniature VTOL twinrotor UAV. UAVs have begun to grab a lot of attention these days due to its numerous applications such as surveillance and relief. Twinrotor is a kind of a helicopter having two main propelle...
The configuration of a marine propulsion system is selected with regard to the maximum power resulting from its maximum design speed and displacement. The propulsion systems of high speed vessels use three or even four propellers, and each propulsion unit may be multi-engine. High speed vessels are designed for maximum speeds, but their factual exploitation speed parameters are usually consider...
A large part of small-sized UAVs that are used for surface scanning, video- and photography, or other similar applications the multirotor type. These small aircraft perform mainly in hovering nearly flight mode, endurance these vehicles depends greatly on efficiency their motors aerodynamic thrust-generating systems, including propellers, ducted fans, etc. Propellers may therefore work differen...
The compound helicopter design could potentially satisfy the new emerging requirements placed on the next generation of rotorcraft. The main benefit of the compound helicopter is its ability to reach speeds that significantly surpass the conventional helicopter. However, it is possible that the compound helicopter design can provide additional benefits in terms of maneuverability. The paper fea...
This papers discusses ongoing development of an aircraft design course designed for mechanical engineering students. Almost without exception, aerospace engineering departments operate in conjunction, collaboration, or coexistence with mechanical engineering departments at most major American universities. On the other hand, the majority of mechanical engineering departments operate alone; i.e....
We evaluate the effect of the aspect ratio, i.e., the distance between the propellers H divided by the diameter D, on the slow dynamics of a von Kármán swirling flow driven by two propellers in a closed cylinder. We use a cell with a fixed diameter D but where the distance between the propellers can be turned continuously and where the inertia from the propellers can also be changed using diffe...
The application of a stochastic optimiser to two problems in engineering design is presented. The benefits of using such an optimiser in conjunction with a calculus based method are discussed, and its ability to succeed in non-linear and discontinuous design spaces is shown in light of two aerospace design optimisation problems: the design of quiet and efficient propellers and the design of a m...
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