why is it that variable wing geometry aircraft do not exist anymore ....etc

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INTRODUCTION
CAUSE OF CORROSION – MOISTURE, WATER, CRACKS
AREAS AFFECTED – SURFACE, LAP JOINTS, FASTENERS
3. NEED OF NDT
NON DESTRUCTIVE TESTS (NDT)
VISUAL INSPECTION
MAGNETIC PARTICLE TEST
LIQUID (DYE) PENITRATION TEST
X – RAY PENETRATION INSPECTION
EDDY CURRENT INSPECTION
ULTRASONIC INSPECTION
DEFECTS OF CONVENTIONAL SYSTEMS
INSPECTION FROM TOP NORMAL TO SURFACE
2. TIME CONSUMING FOR POINT TO POINT INSPECTION
3. INABILITY TO DETECT (a) DISBONDS IN MULTILAY ....etc

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Advantages of inflatable wings

High aspect ratio
High durability
We can change the value of CL
Can be packed and deployed numerous times
Wing can recover shape in flight even if the load limit is exceeded
Impact absorption and impact resiliency


Applications
Military applications
1.border patrol
2. surveillance and inspection.
Commercial applications
1. airborne observation of crops
2. inspection of pipelines and power lines.
3.mapping of particular area
Space research
....etc

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Detection of corrosion damage in aircraft wing skin structures is an ongoing NDT challenge. Ultrasonic methods are known and well-accepted techniques, which are relatively simple to carry out in terms of setup, probes and instrumentation and operator training. However, with conventional inspection from the top surface using a transducer at normal incidence (0o to the normal to the surface) producing a visual picture in the form of a C-scan, it is very tie consuming to point-by-point inspects large aircraft wing skin areas. In addition it is too ....etc

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Abstract
Mounting engines on the wing causes complex wing
flutter characteristics. The location of the engine mass
and the stiffness of the pylon relative to the wing are
important in preventing hazardous wing flutter. In
addition, if the nacelles are installed over the wing,
aerodynamic interference between the wing and the
nacelle may cause unfavorable flutter characteristics, in
particular, at transonic speeds. The flutter
characteristics of an over-the-wing engine mount
configuration obtained from theoretical analyses and
....etc

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1.Which one of the following is used as a passive-component in electric circuits?
(A)Resistor(B)Transistor
(C )Tunnel diode(D)Vaccum triode

2.The length of a conductor is doubled, then its resistance will be :
(A)Became same(B)Became halfed
(C )Became doubled(D)Four times increased

3. The defects of a primary cell is :
(A)Sulfation and buckling (C ) Sulphation and local action
(B) Local action and polarization (D) Buckling and polarization

4. The insulator used to separate commutator segment is :
(A)Asbestos(B ....etc

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HI,
I am a student from malaysia, i am currently do a project about fabrication of aircraft, i think this will be helpful to me. Hope that you can help me as soon as possible. ....etc

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1.The unit of solid angle is
A)radianB) steradian
C) degreeD) none of the above

2.What is the temperature co-efficient value of aluminum at 20° Celsius ?
A)40.3x10“*B) 40.3x1 O'3
C) 40.3x10_zD) 40.3 x10'5

3.How to increase the current range of a meter ?
A)A low resistance connected in series
B)A high resistance connected in series
C)A low resistance connected in parallel
D)A high resistance connected in parallel

4.One ampere-hour is equal to
A)36000 Coulombs C) 360 Coulombs
B) 3600 Coulombs D) 36 Coulo ....etc

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Abstract
Active Aeroelastic Wing (AAW) Technologyrepresents a new design approach for aircraft wingstructures. The technology uses static aeroelasticdeformations as a net benefit during maneuvering.AAW is currently being matured through a flightresearch program1; however, transition of thetechnology to future systems will require educatingdesigners in multiple disciplines of this new designapproach. In order to realize the full benefits of AAW,aeroelastic effects will need to be accounted for fromthe beginning of the design process. Co ....etc

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Novel shape memory effect (SME) and pseudoelastic behavior are discovered in single-crystalline Au, Cu, and Ni nanowires with lateral dimensions of 1.5-10 nm. Under tensile loading and unloading, these wires can recover elongations of up to 50%, well beyond the recoverable strains of 5-8% typical for most bulk shape memory alloys (SMAs). Results of atomistic simulations and evidences from experiments show that this phenomenon only exists at the nanometer scale and is associated with a reversible crystallographic lattice reorientation driven byt ....etc

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