The evolution of helicopters

Pao Yue-kong Library Electronic Theses Database

The evolution of helicopters

 

Author: Chen, Rui
Title: The evolution of helicopters
Degree: M.Sc.
Year: 2016
Subject: Hong Kong Polytechnic University -- Dissertations
Helicopters.
Helicopters -- Aerodynamics.
Helicopters -- Control systems.
Helicopters -- Electric equipment.
Department: Faculty of Engineering
Pages: vii, 57 pages : color illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2917021
URI: http://theses.lib.polyu.edu.hk/handle/200/8597
Abstract: The constructal law tells us that all flow (inanimate, animate) systems are all evolving to some certain directions. For example, the airplane tends to be larger and larger. And the mass of animals' organ (heart, lung) is proportional to the body size. The birth of helicopter is not that far, about 60 years ago. However, it has developed a lot in size, architectures, engine and so on. Strong correlations emerge between dimensions and performances. Basically, larger means more efficient for rotor and engine. Besides, proportionalities are everywhere, engine size, body size and fuel load. In time arrow, engine efficiency obviously improved due to technology evolution. All these trends agree with the constructal law.

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