Introduction to Influence of Forward and Descent Flight on Quadrotor Dynamics
The focus of this chapter is an aircraft propelled with four rotors, called the quadrotor. Quadrotor was among the first rotorcrafts ever built. The first successful quadrotor flight was recorded in 1921, when De Bothezat Quadrotor remained airborne for two minutes and 45 seconds. Later he perfected his design, which was then powered by 180-horse power engine and was capable of carrying 3 passengers on limited altitudes. Quadrotor rotorcrafts actually preceded the more common helicopters, but were later replaced by them because of very sophisticated control requirements Gessow & Myers (1952). At the moment,…
Introduction to Study of Advanced Materials for Aircraft Jet
Engines Using Quantitative Metallography The aerospace industry is one of the biggest consumers of advanced materials because of its unique combination of mechanical and physical properties and chemical stability. Highly alloyed stainless steel, titanium alloys and nickel based superalloys are mostly used for aerospace applications. High alloyed stainless steel is used for the shafts of aero engine turbines, titanium alloys for compressor blades and finally nickel base superalloys are used…
Introduction to Variational Approach to the Fuel Optimal
Control Problem for UAV Formations The pivotal role of unmanned aerial vehicles (UAVs) in modern aircraft technology is evidenced by the large number of civil and military applications they are employed in. For example, UAVs successfully serve as platforms carrying payloads aimed at land monitoring (Ramage et al., 2009), wildfire detection and management (Ambrosia…
Introduction to One Dimensional Morphing Structures for Advanced Aircraft
Since the Wright Brothers’ first flight, the idea of “morphing” an airplane’s characteristics through continuous, rather than discrete, movable aerodynamic surfaces has held the promise of more efficient flight control. While the Wrights used a technique known as wing warping, or twisting the wings to control the roll of the aircraft (Wright and Wright, 1906), any number of possible morphological changes could be undertaken to modify an aircraft’s flight path or overall performance. Some notable examples include the Parker Variable Camber Wing used for increased forward speed (Parker, 1920), the impact of a variable dihedral wing on aircraft …
Helicopter rotor
A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) and a…
Propfan
A propfan or open rotor engine is a type of aircraft engine related in concept to both the turboprop and turbofan,…
Contra-rotating propeller
Contra-rotating propellers of a modified North American P-51 Mustang fitted with a Rolls-Royce Griffon engine. A…
Counter-rotating propellers
Counter-rotating propellers are sometimes used on twin-, and other multi-engine, propeller-driven aircraft.…
