Saturday, July 9, 2011

HISTORY of FLIGHT

Ornithopters (Flapping- wing)
The beauty and freedom of birds has always drawn our admiration and envy. The freedom to move in any direction over all obstacles is a capability that all of us would enjoy. early attempts to defy gravity involved the invention of machines, such as Ornithopters.


This type of flying machine utilizes the flapping of the wings in order to achieve flight. Needless, is to say that all attempts to fly using this type of machine failed.
Machine lighter-than-air
In the year between 1650 and 1900 , there was a second attempt at flying with a less sophisticated but more efficient generation of flying machines, the lighter-than-air craft. The idea of filling a closed container with a substance that normally rises through the atmosphere was known as early as the thirteen century. Over a five hundred year span, different substances came to be known as being lighter-than-air. The most common gas proposed was water vapor, helium and hydrogen. The first successful attempts at achiveing flight using his type of crafts were made by the Montgolfier brothers in France. Their most successful attempt was in 1783.


The most successful builder of this type of lighter-than-air craft was Count Ferdinand von Zeppelin (picture above) . In the early 1930's the German Graft Zeppelin machine was able to make a Trans-Atlantic flight to the United States. The large Hidenburg was equally successful until it was destroyed by fire while attempting a landing in 1937 at Lakehurst,New Jersey.
Orville and Wilbur Wright
In the early 1900s two American brothers, Orville and Wilbur Wright from Dayton, Ohio began to experiment with gliders. The gliders were built using data from Otto Lilienthal in Europe. Most of these flights turn out to be a failure. In 1901, they decided to gather their own wing data by conducting systematic experiment on different type of wing configurations. In 1902, Glider has wingtip to wingtip measurement of 32 ft. and wing width of 5 ft. This was the first aircraft with three-axis control. This mean that the aircraft could go up or down, left or right, and could also roll about its longitudinal axis. At Kitty Hawk, they perform over 800 flights, the early problem of aircraft were solved .


The Wright brothers, now confident about their ability to flight, decided to turn their attention to power. In 1903, after redesigning the airframe of their 1902 glider, the Kitty Hawk Flyer was born. In December 17 , 1903 , with this aircraft, Orville and Wilbur Wright demanstrated the flight of self powered aircraft.
Following the Wright Brothers success, the aeronautical activity took place basically everywhere in the world.
Bleriot XI Monoplane



The future potential of the airplane was realized when Louis Bleriot (France) flew his XI monoplane across the Einglish Channel in 1909. This was made Britain could no longer feel secure because England rely only on the royal navy.
Henri Fabre Seaplane:
The first Seaplane was built and flown by Henri Fabre (France) in 1910 at Martigues, France. The great pioneer of marine flying was Glen Curtiss of the United States. In 1911 he fitted floats to his pusher biplanes and flow it off the water.


First flight of a seaplane called a Hydravion was created by Frenchman Henri Fabre. Using a 50 horsepower Gnome rotary engine, Fabre flew 1650 feet on water (March 28, 1910).
Vikers Gunbus:



Until 1914 , As the war progressed, the manufacturers were pressed to equip airplanes with guns, bombs and torpedos. This Vicker Gunbus (England) had been accomplished by 1914.

F.X. Trimotor:


From the United States, Ford Trimotor is the world's first airline services were in 1910. With the advances in aircraft designed brought about by war, the enclosed cabin airplane became the standard for commercial airline travel by the early 1920's.
As the time went by, the speed of airplanes began to increase. From the famous 12 mph top-speed of Wright Brithers Kitty Hawk Flyer , until in 1947, a test pilot named Chuck Yeager flied exceeded the speed of sound. From that point on a series of experimental supersonic aircraft took to the sky breaking speed record after speed record. Today we still can see some of supersonic aircrafts that were built in the 1960's like Concorde(mach 2), TU-144 (mach 2.2), SR-71 Blackbird (mach 3).

Hyperlink:http://www.thaitechnics.com

principle of plane

INTRODUCTION
It was , of couse, the birds who were responsible for the whole complicated story and business. A man with the brain of a scientist began to think seriouly about attainment of the dream. This was Leonado da Vinci (1452-1519), whose detail study of bird flight nevertheless led him to the erroneous conclusion that man's muscular power, so superior to that of the birds, should enable him to fly in a properly constructed ornithopter,or flapping-wing aircraft.
In 1680, Giovanni Alphonso Borelli's has a result of his detailed study of bird flight, man did not have the power output needed to lift himself and a machine into the air. This brought an end to practically all heavier-than-air experiments until nineteenth century.
On October 15, 1783, Jean-Francois had made a flight in a Mongolfier hot-air balloon tethered flight for 4 minutes 24 second. Lessthan two month later a hydrogen-filled balloon had completed a successful two-hours free flight.
German Otto Lilienthal(1848-1896), whose graceful and beautifully-constructed hang-gliders enable him to become the first man in the world to fly confidently and regularly, total more than 2000 flights.He did not develop control surfaces for his gliders, but rely on body movements to provide limited control in the three axes of pitch, yaw, and roll. He lost his life at age of 48 on 10 August 1896 due to one of his gliders stalled and crashed to the ground. The persons who pioneer of the gliders were Otto Lilienthal (German), Percy Pilcher (England) He also lost his life in a glider clashed three years after Lilienthal, and Octave Chanute (American)(1832-1910)
Wilbur (1867-1912) and Orville (1871-1948) Wright, had been interested in the possibility of mechanical flight in the early years. By 1900, they became freinds with Chanute . Chanute encouraged , providing information, and directly assisted the Wrights to achieve their goal of power flight later.First flight they flied the flyer was on 17 December 1903.This is generally accepted as the first man to accomplised the dream.Eventhrough there are some controversy over the first powered aircraft.
Alberto Santos-Dumont a little brazilian living in France. During 1906, with his No.14-bis which was power by a 50 horsepower Antoinette engine, he made a first flight of 60 meter at Bagattelle, Paris on 23 October 1906. Some people believed that Santos-Dumont really had made the first power flight in history.



PRINCIPLES

Forces Acting on An Airplane
There are four forces acting on the airplane all the time during airplane is flying.The four forces are
(1) Lift, (2) Gravity force or Weight, (3) Thrust, and (4) Drag.
Lift and Drag are considered aerodynamics forces because they exist due to the movement of the Airplane through the Air.


Lift: is produced by a lower pressure created on the upper surface of an airplane's wings compared to the pressure on the wing's lower surfaces,causing the wing to be LIFTED upward. The special shape of the airplane wing (airfoil) is designed so that air flowing over it will have to travel a greater distance and faster resulting in a lower pressure area (see illustration) thus lifting the wing upward. Lift is that force which opposes the force of gravity (or weight).


Lift depends upon (1) shape of the airfoil (2) the angle of attack (3) the area of the surface exposed to the airstream (4) the square of the air speed (5) the air density.


Weight: The weight acts vertically downward from the center of gravity (CG) of the airplane.
Thrust: is defined as the forward direction pushing or pulling force developed by aircraft engine . This includes reciprocating engines , turbojet engines, turboprop engines.


Drag: is the force which opposes the forward motion of airplane. specifically, drag is a retarding force acting upon a body in motion through a fluid, parallel to the direction of motion of a body. It is the friction of the air as it meets and passes over an airplane and its components. Drag is created by air impact force, skin friction, and displacement of the air.


Aircraft Flight Control
An airplane is equipped with certain fixed and movable surfaces or airfoil which provide for stability and control during flight. These are illustrated in the picture.


Each of the named of the airfoil is designed to perform a specific function in the flight of the airplane. The fixed airfoils are the wings, the vertical stabilizer, and the horizontal stabilizer. The movable airfiols called control surfaces, are the ailerons, elevators, rudders and flaps.The ailerons, elevators, and rudders are used to "steer" the airplane in flight to make it go where the pilot wishes it to go. The flaps are normally used only during landings and extends some during takeoff.
Aileron: may be defined as a movable control surface attached to the trailing edge of a wing to control an airplane in the roll, that is , rotation about the longitudinal axis.
Elevator: is defined as a horizontal control surface, usually attached to the trailing edge of horizontal stabilizer of an airplane, designed to apply a pitching movement to the airplane. A pitching movement is a force tending to rotate the airplane about the lateral axis,that is nose up or nose down.
Rudder: is a vertical control surface usually hinged to the tail post aft of the vertical stabilizer and designed to apply yawing movement to the airplane, that is to make it turn to the right or left about the vertical axis..

Hyperlink:

Thursday, July 7, 2011

Airbus

Airbus also relies on industrial co-operation and partnerships with major companies all over the world, and a network of some 1,500 suppliers in 30 countries.Airbus is a leading aircraft manufacturer whose customer focus, commercial know-how, technological leadership and manufacturing efficiency have propelled it to the forefront of the industry.Airbus’ modern and comprehensive product line comprises highly successful families of aircraft ranging from 107 to 525 seats: the single-aisle A320 Family, the wide-body long-range A330/A340 and the all-new next generation A350 XWB Family, and the ultra long-range, double-decker A380 Family. The company also continues to broaden its scope and product range by applying its expertise to the military market. It is as well extending its portfolio of freighter aircraft that will set new standards in the general and express freight market sectors.
Across all its fly-by-wire aircraft families Airbus’ unique approach ensures that aircraft share the highest possible degree of commonality in airframes, on-board systems, cockpits and handling characteristics, which reduces significantly operating costs for airlines.
Dedicated to helping airlines enhance the profitability of their fleets, Airbus also delivers a wide range of customer services in all areas of support, tailored to the needs of individual operators all over the world.
Headquartered in Toulouse, Airbus is owned by EADS, a global leader in aerospace, defence and related services. This group – which is comprised of Astrium, Cassidian and Eurocopter, in addition to Airbus – has a presence on every continent, and employs a total workforce of more than 119,000. 
Airbus itself is a truly global enterprise of some 52,500 employees, with fully-owned subsidiaries in the United States, China, Japan and in the Middle East, spare parts centres in Hamburg, Frankfurt, Washington, Beijing and Singapore, training centres in Toulouse, Miami, Hamburg and Beijing and more than 150 field service offices around the world.
Airbus today consistently captures about half of all commercial airliner orders.

Wednesday, July 6, 2011

Airline Pilot Salary

When making a career decision, it's important to know what your earning potential might be after you graduate. For someone who wants to be an airline pilot, the same is true, and it's important to know what recent airline pilot salaries are – and to know that the demand for new pilots is growing.

The airline pilot job includes the following responsibilities:
 (i) navigates or pilots aircraft to transport mail, freight, and passengers.
 (ii) supervises or performs pre-flight checks of loading, fuel supplies, instruments, and switches.
 (iii) discusses with meteorologist weather conditions for take-off and flight.
 (iv) supervises activities of flight deck crew.
 (v) modifies flight plan as necessary.


There are thousands of new pilots hired each year worldwide. If you have always wanted to be an airline pilot, now is the time to get your flight training, as demand is expected to increase even morefor pilots, as older pilots start to retire. While a pilot's salary is attractive, in order to have the best employment opportunities, it is recommended that you learn to fly at an accredited flight school. Check out these commercial and airline pilot salaries

American Airlines: 1st yr F/O: $31,080 and 10th yr Captain $123,420


Delta Airlines: 1st yr F/O: $50,400 and 10th yr Captain $204,636


UPS: 1st yr F/O: $26,004 and 10th yr Captain $200,508


Southwest: 1st yr F/O: $42,960 and 10th yr Captain $159,000


ATA: 1st yr F/O: $36,000 and 10th yr Captain $136,632


Airborne Express: 1st yr F/O $28,536 and 10th yr Captain $146,184

This sampling of commercial airline pilot salaries does not include benefits such as flexibility of scheduling, free travel for your family, health care and retirement benefits.
The airline industry worldwide is projected to continue to grow over the next at least two decades. If you are looking for a career that will really take you places and give you the opportunity to earn a good salary, you should consider attending an accredited flight school, such as Phoenix East Aviation.

Image of expensive aeroplanes










Tuesday, July 5, 2011

The Airline Industry



In order to understand how new aircraft might fit into the current market, one must understand the customer. For commercial transport aircraft manufacturers, the customers are the airlines. For business aircraft, military programs, or recreational aircraft, the market behaves quite differently.


The following discussion, intended to provide an example of an up-to-date view of one market, is excerpted from the British Airways web site, Jan. 2000. 

Air travel remains a large and growing industry. It facilitates economic growth, world trade, international investment and tourism and is therefore central to the globalization taking place in many other industries.

In the past decade, air travel has grown by 7% per year. Travel for both business and leisure purposes grew strongly worldwide. Scheduled airlines carried 1.5 billion passengers last year. In the leisure market, the availability of large aircraft such as the Boeing 747 made it convenient and affordable for people to travel further to new and exotic destinations. Governments in developing countries realized the benefits of tourism to their national economies and spurred the development of resorts and infrastructure to lure tourists from the prosperous countries in Western Europe and North America. As the economies of developing countries grow, their own citizens are already becoming the new international tourists of the future.

Business travel has also grown as companies become increasingly international in terms of their investments, their supply and production chains and their customers. The rapid growth of world trade in goods and services and international direct investment have also contributed to growth in business travel.

Worldwide, IATA, International Air Transport Association, forecasts international air travel to grow by an average 6.6% a year to the end of the decade and over 5% a year from 2000 to 2010. These rates are similar to those of the past ten years. In Europe and North America, where the air travel market is already highly developed, slower growth of 4%-6% is expected. The most dynamic growth is centered on the Asia/Pacific region, where fast-growing trade and investment are coupled with rising domestic prosperity. Air travel for the region has been rising by up to 9% a year and is forecast to continue to grow rapidly, although the Asian financial crisis in 1997 and 1998 will put the brakes on growth for a year or two. In terms of total passenger trips, however, the main air travel markets of the future will continue to be in and between Europe, North America and Asia.

Airlines' profitability is closely tied to economic growth and trade. During the first half of the 1990s, the industry suffered not only from world recession but travel was further depressed by the Gulf War. In 1991 the number of international passengers dropped for the first time. The financial difficulties were exacerbated by airlines over-ordering aircraft in the boom years of the late 1980s, leading to significant excess capacity in the market. IATA's member airlines suffered cumulative net losses of $20.4bn in the years from 1990 to 1994.

Since then, airlines have had to recognize the need for radical change to ensure their survival and prosperity. Many have tried to cut costs aggressively, to reduce capacity growth and to increase load factors. At a time of renewed economic growth, such actions have returned the industry as a whole to profitability: IATA airlines' profits were $5bn in 1996, less than 2% of total revenues. This is below the level IATA believes is necessary for airlines to reduce their debt, build reserves and sustain investment levels. In addition, many airlines remain unprofitable.

To meet the requirements of their increasingly discerning customers, some airlines are having to invest heavily in the quality of service that they offer, both on the ground and in the air. Ticketless travel, new interactive entertainment systems, and more comfortable seating are just some of the product enhancements being introduced to attract and retain customers.

A number of factors are forcing airlines to become more efficient. In Europe, the European Union (EU) has ruled that governments should not be allowed to subsidize their loss-making airlines. Elsewhere too, governments' concerns over their own finances and a recognition of the benefits of privatization have led to a gradual transfer of ownership of airlines from the state to the private sector. In order to appeal to prospective shareholders, the airlines are having to become more efficient and competitive.

Deregulation is also stimulating competition, such as that from small, low-cost carriers. The US led the way in 1978 and Europe is following suit. The EU's final stage of deregulation took effect in April 1997, allowing an airline from one member state to fly passengers within another member's domestic market. Beyond Europe too, 'open skies' agreements are beginning to dismantle some of the regulations governing which carriers can fly on certain routes. Nevertheless, the aviation industry is characterized by strong nationalist sentiments towards domestic 'flag carriers'. In many parts of the world, airlines will therefore continue to face limitations on where they can fly and restrictions on their ownership of foreign carriers.

Despite this, the airline industry has proceeded along the path towards globalization and consolidation, characteristics associated with the normal development of many other industries. It has done this through the establishment of alliances and partnerships between airlines, linking their networks to expand access to their customers. Hundreds of airlines have entered into alliances, ranging from marketing agreements and code-shares to franchises and equity transfers.

The outlook for the air travel industry is one of strong growth. Forecasts suggest that the number of passengers will double by 2010. For airlines, the future will hold many challenges. Successful airlines will be those that continue to tackle their costs and improve their products, thereby securing a strong presence in the key world aviation markets.

The commercial aviation industry in the United States has grown dramatically since the end of World War II. In 1945 the major airlines flew 3.3 billion revenue passenger miles (RPMs). By the mid 1970s, when deregulation was beginning to develop, the major carriers flew 130 billion RPMs. By 1988, after a decade of deregulation, the number of domestic RPMs had reached 330 billion (Source: Winds of Change).

The United States is the largest single market in the world, accounting for 33 per cent of scheduled RPMs (41 per cent of total scheduled passengers) in 1996. The most significant change in the history of the industry came in 1976 when the Civil Aeronautics Board (CAB) asked Congress to dismantle the economic regulatory system and allow the airlines to operate under market forces. This changed the face of commercial aviation in the United States. Congress passed the Airline Deregulation Act in 1978, easing the entry of new companies into the business and giving them freedom to set their own fares and fly whatever domestic routes they chose.

Deregulation of the industry was followed quickly by new entrants, lower fares and the opening of new routes and services to scores of cities. The growth in air traffic brought on by deregulation's first two years ended in 1981 when the country's professional air traffic controllers went on strike. Traffic surged again after 1981, adding 20 million new passengers a year in the post strike period, reaching a record 466 million passengers in 1990.

In 1989 events began which severely damaged the economic foundations of the industry. The Gulf crisis and economic recession caused the airlines to lose billions of dollars. The industry experienced the first drop in passenger numbers in a decade, and by the end of the three-year period 1989-1992 had lost about US$10 billion - more than had been made since its inception. Great airline names like Pan American and Eastern disappeared, while others, such as TWA and Continental Airlines, sought shelter from bankruptcy by going into Chapter 11.

Today the domestic industry in the US is a low cost, low fare environment. Most of the major airlines have undergone cost restructuring, with United Airlines obtaining employee concessions in exchange for equity ownership. Some airlines sought the protection of Chapter 11 bankruptcy to restructure and reduce costs and then emerged as strong low-cost competitors. The majority have entered into cross-border alliances to improve profitability through synergy benefits.

In 1993 President Clinton appointed the National Commission to ensure a strong competitive industry. Its recommendations seek to establish aviation as an efficient, technologically superior industry with financial strength and access to global markets.

Another key recommendation by the Commission was that foreign airlines should be allowed to invest up to 49 per cent of the equity in US airlines and in return, obtain up to 49 per cent of the voting rights. Current US law allows foreign investment up to 49 per cent of the equity with voting rights of up to 25 per cent. An amendment to existing law requires an Act of Congress.

Autumn 1996 saw the UK and US Governments hold bilateral talks with the intention of negotiating an 'Open Skies' arrangement between the two countries. The result of these talks is eagerly awaited by airlines on both sides of the Atlantic.

The last few years have seen the proliferation of airline alliances as the so called 'global carriers' of the future are created. North American carriers have been very much at the forefront of this activity, and today much of the world aviation market is shared between several large global alliances, including KLM/NorthWest, Atlantic Excellence alliance, STAR, and the British Airways / American Airlines alliance which also includes Canadian Airlines and Qantas. The latter still awaits regulatory approval on both sides of the Atlantic.

Friday, July 1, 2011

Aeroplane fuel

Aviation fuel is a specialized kind of fuel that is consumed by aircraft s. Its quality is generally better then the fuel normally used in automobiles etc. It contains additives to make it less explosive and less dangerous. Its a kind of petroleum spirit and kerosene that is used in engines. Aviation fluid is a complex composition and is a combination of about hundred different chemicals mostly hydro-carbons.
The most common jet fuel is kerosene.  Some military jet aircraft use a mixture of kerosene with gasoline as fuel (it can be as much as 50% gasoline).  Piston driven aircraft use a high-octane gasoline.That is pretty much correct. It is called Jet Fuel, but it's ingredients are closer to that of kerosene than to regular gasoline. You cannot use it in an automobile. It has a higher flash point and is not as dangerous as gasoline, that is why they make and use it for the aerospace industry.

Monday, June 20, 2011

Autopilot


There are three levels of control in autopilots for smaller aircraft. A single-axis autopilot controls an aircraft in the roll axis only. A two-axis autopilot controls an aircraft in the pitch axis as well as roll axis with pitch-oscillation-correcting ability. A three-axis autopilot adds control in the yaw axis and is not required in many small aircraft. The 3 different axes mentioned are shown in Fig 1.1. The flight may also receive inputs from on-board radio navigation systems to provide true automatic flight guidance once the aircraft has taken off until shortly before landing.
In the early days of aviation, aircraft required the continuous attention of a pilot in order to fly safely. As aircraft range increased allowing flights of many hours, the constant attention led to serious fatigue. An autopilot is designed to perform some of the tasks of the pilot. Along the flight path the vehicle is under the influence of various accelerating forces in all directions and these factors cause it to deviate from its desired path. So the plane loses its heading as well as orientation. This is where autopilot comes into picture.
The basic objective of our project is to design and develop an auto pilot control system which can maintain the desired orientation of the glider. The acceleration data in all 3 axes are obtained by the combination of acceleration and gyroscopes and the angles of roll, pitch and yaw are calculated. These values are taken for estimation using a Kalman filter and the resulting values helps us in the decision making. The flight is kept in its path and desired orientation with the help of servo motors.



Saturday, June 18, 2011

IMPORTANCE OF AVIATION AND SPACE IN OUR WORLD TODAY


I have long held the opinion that science and technology, particularly that concerned with 
aeronautics and space science and exploration, may well hold the key to our future existence -- to 
the very survival of freedom in the world of tomorrow.
Perhaps my acute awareness of the importance of these activities stems from the fact that 
I am privileged to be the ranking Republican member of two Senate Committees and the second 
ranking Republican of a third Committee, each having a degree of cognizance over the United 
States' efforts in aeronautics and space. I am referring, respectively, to the Senate Armed 
Services Committee, the Aeronautical and Space Sciences Committee and the Appropriations 
Subcommittee on Defense.
A review of the significant developments in aeronautics and space in the past decade 
parades many wondrous and thrilling achievements.
I believe the present status and future potential of aviation is a testimonial to the value of 
aeronautical research and development. The most distant lands are now merely hours away; 
Americans accumulate a collective one trillion miles in intercity travel; and the aviation industry, 
which ranks seventh among the Nation's leading industries, is considered by economists as a key 
factor in our sustained national economic growth.
Our space science and exploration efforts, which are still in their infant stage when 
compared with the age of aviation, nevertheless also have produced many notable achievements.  
The United States space efforts have resulted in the development of effective meteorological 
weather forecasting and global communication satellite systems; brought about an acceleration 
of industrial technology in other fields through the development of new exotic metals and other 
materials; and demonstrated that complex computer systems can be used to solve a variety of 
social and economic problems. Moreover, from a military standpoint, our space efforts to date 
have shown that a strong national program to explore and use outer space may well be essential 
to our security and to our position of world leadership.
In my mind, however, the most significant achievement directly attributable to space 
exploration is that it has, in so short a time, challenged and stimulated our youth at all 
educational levels in the quest for scientific knowledge. This new attitude should produce a 
much needed increase in both the quantity and quality of our future manpower resources,
Despite the achievements made to date, I firmly believe we are only at the brink of the 
new discoveries and developments which will evolve from space science and exploration and 
which will be of significant benefit to all mankind. The final determination of whether our 
continued efforts in space will produce the dividends many of us perceive probably will not be 
made for several decades.

Friday, June 17, 2011

Federal Aviation Regulations


The Federal Aviation Regulations, or FARs, are rules prescribed by the Federal Aviation Administration (FAA) governing all aviation activities in the United States. The FARs are part of Title 14 of the Code of Federal Regulations (CFR). A wide variety of activities are regulated, such as airplane design, typical airline flights, pilot training activities, hot-air ballooning, lighter-than-air aircraft, man-made structure heights, obstruction lighting and marking, and even model rocket launches and model aircraft operation. The rules are designed to promote safe aviation, protecting pilots, flight attendants, passengers and the general public from unnecessary risk. They are also intended to protect the national security of the United States, especially in light of the September 11, 2001 attacks.
The FARs are organized into sections, called parts due to their organization within the CFR. Each part deals with a specific type of activity. For example, 14 CFR Part 141 contains rules for pilot training schools. The sections most relevant to aircraft pilots and AMTs (Aviation Maintenance Technicians) are listed below. Many of the FARs are designed to regulate certification of pilots, schools, or aircraft rather than the operation of airplanes. In other words, once an airplane design is certified using some parts of these regulations, it is certified regardless of whether the regulations change in the future. For that reason, newer planes are certified using newer versions of the FARs, and in many aspects may be thus considered safer designs.

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Wednesday, June 15, 2011

Aviation in world war 2


Naval Aviation is the application of manned military air power by navies, including ships that embark fixed-wing aircraft or helicopters. In contrast, Maritime Aviation is the operation of aircraft in a maritime role under the command of non-naval forces such as the former RAF Coastal Command or a nation's coast guard. An exception to this is the United States Coast Guard, which is considered part of U.S. Naval Aviation in the same manner as the aviation assets of the United States Navy and the United States Marine Corps.
Naval aviation is typically projected to a position nearer the target by way of an aircraft carrier. Carrier aircraft must be sturdy enough to withstand demanding carrier operations. They must be able to launch in a short distance and be sturdy and flexible enough to come to a sudden stop on a pitching deck; they typically have robust folding mechanisms that allow higher numbers of them to be stored in below-decks hangars. These aircraft are designed for many purposes including air-to-air combat, surface attack, submarine attack, search and rescue, materiel transport, weather observation, reconnaissance and wide area command and control duties.
In the United States military, Marine Aviation is often supported by Navy's Amphibious assault ships and associated Navy personnel. Conversely, selected Marine Corps squadrons and aircraft have often integrated, operated and deployed with the U.S. Navy's carrier air wings aboard aircraft carriers. This has historically included Marine Corps F-4 Phantom II and A-6 Intruder aircraft, and continues today with Marine Corps F/A-18 Hornet and EA-6B Prowler aircraft under an arrangement known as Tactical Air Integration.
U.S. naval aviation began with pioneer aviator Glenn Curtiss who contracted with the Navy to demonstrate that airplanes could take off from and land aboard ships at sea. One of his pilots, Eugene Ely, took off from the USS Birmingham (CL-2) anchored off the Virginia coast in November 1910. Two months later Ely landed aboard another cruiser USS Pennsylvania (ACR-4) in San Francisco Bay, proving the concept of shipboard operations. However, the platforms erected on those vessels were temporary measures. The U.S. Navy and Glenn Curtis experienced two firsts during January 1911. On January 27, Curtiss flew the first seaplane from the water at San Diego bay and the next day U.S. Navy Lt Theodore G. “Spuds” Ellyson, a student at the nearby Curtiss School, took off in a Curtiss “grass cutter” plane to become the first Naval aviator. Meanwhile, Captain Henry C. Mustin successfully designed the concept of the catapult launch, and in 1915 made the first catapult launching from a ship underway. Through most of World War I, the world's navies relied upon floatplanes and flying boats for heavier-than-air craft. Genuine aircraft carriers did not emerge beyond Britain until the early 1920s.
Other early operators of seaplanes were France, Imperial Germany and Czarist Russia. The foundations of Greek naval aviation were set in June 1912, when Lieutenant Dimitrios Kamberos of the Hellenic Aviation Service flew with the "Daedalus", a Farman Aviation Works aircraft that had been converted into a seaplane, at an average speed of 110 km per hour, achieving a new world record. Then, on January 24, 1913 the first wartime naval aviation interservice cooperation mission, took place above the Dardanelles. Greek Army First Lieutenant Michael Moutoussis and Greek Navy Ensign Aristeidis Moraitinis, on board the Maurice Farman hydroplane (floatplane/seaplane), drew a diagram of the positions of the Turkish fleet against which they dropped four bombs. This event was widely commented upon in the press, both Greek and international.

Tuesday, June 14, 2011

General Aviation in Nepal

Natasha Shrestha and Aviaclub Nepal in conjunction with the Department of Civil Aviation of Nepal have made wonderful progress with General Aviation in Nepal. It is now possible for private aircraft to make cross-country flights in Nepal. Before, this was not possible, and no one had any explanation why. Aviaclub Nepal is based in Pokhara. A few years ago, Aviaclub Nepal organized a cross county on their two aircraft from Pokhara to Bharatpur and Migauli. Distance was more a 100 km. It was 1.30 min flight in one-way with two landing. They made break before return to Pokhara in Jungle resort and enjoy the elephant riding. It was fantastic, very interesting and they got very warm reception in every place. Now they have put the information with photo in their web side. Natasha has worked endlessly to allow Nepal to allow the foreign pilots to fly on territory of Nepal. After this event she discussed with civil aviation. They are fully supporting for organization a International Cross Country Safari on Ultralight. Now Aviaclub Nepal has made an itinerary for these flights.

for more information:

Monday, June 13, 2011

Paragliding


Paragliding is a recreational and competitive flying sport. A paraglider is a free-flying, foot-launched aircraft. The pilot sits in a harness suspended below a fabric wing, whose shape is formed by its suspension lines and the pressure of air entering vents in the front of the wing.
In 1952 Domina Jalbert advanced governable gliding parachutes with multi-cells and controls for lateral glide.
In 1954, Walter Neumark predicted (in an article in Flight magazine) a time when a glider pilot would be “able to launch himself by running over the edge of a cliff or down a slope ... whether on a rock-climbing holiday in Skye or ski-ing in the Alps”.
In 1961, the French engineer Pierre Lemoigne produced improved parachute designs which led to the Para-Commander. The ‘PC’, had cut-outs at the rear and sides that enabled it to be towed into the air and steered – leading to parasailing/parascending.
Sometimes credited with the greatest development in parachutes since Leonardo da Vinci[by whom?], the American Domina Jalbert invented the Parafoil which had sectioned cells in an aerofoil shape; an open leading edge and a closed trailing edge, inflated by passage through the air – the ram-air design. He filed US Patent 3131894 on January 10, 1963.
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Jet pack


Jet pack, rocket belt, rocket pack, and similar names, are various types of device, usually worn on the back, that are propelled by jets of escaping gases (or in some cases liquid water) so as to allow a single user to fly.
The concept of these devices emerged from science fiction in the 1920s and popularised in the 1960s as the technology became a reality. Currently, the only practical use of the jet pack has been extra-vehicular activity for astronauts. Despite decades of advancement in the technology, the challenges of Earth's atmosphere, Earth's gravity, and the human body (which is not well suited for this type of flight)[citation needed] remain an obstacle to its potential use in the military and as a means of personal transport.

During World War II, Germany made late-war experiments of strapping two wearable shortened Schmidt pulse jet tubes of low thrust to the body of a pilot. The working principle was the same as the Argus As 014 pulse jet that powered the Fieseler Fi 103 flying bomb, though the size was much smaller.[citation needed]
The device was called "Himmelstürmer" (Heaven stormer) and operated as follows: when the flier ignited both engines simultaneously the tubes began to pulse modulate. The angled rear tube strapped to the flier's back provided both lift and forward thrust while the chest mounted deflector tube of lower thrust maintained a constant upward thrust. This lifted the flier up and forward. By opening the throttle to the rear tube, calculated "jumps" could be made of up to 60 meters (180 ft) at low altitude (under 50 ft, 15 m). The tubes consumed very little fuel but not much could be carried either.
The intended use for this device was for German engineer units to cross minefields, barbed wire obstacles, and bridgeless waters. The device was never intended for troop use, despite the imaginative depiction of it in that role in the comic book and film The Rocketeer (which was a prop bearing no resemblance to the real device).
At the end of the war this device was handed over to Bell Aerosystems which tested it on a tether out of fear of harm as no test flier was willing to risk his life with the German machine.[citation needed] What became of the device is not known.[citation needed]
The fictional device used by The Rocketeer was a rocket pack that was technically unique (at least in the film adaptation) because it was designed to remain cool. The Himmelstürmer, by comparison, never operated long enough to get extremely hot and both tubes were angled away from the body of the flier. In operation the thrust difference between pulse tubes acted as a push/pull/lift system. Flight time for jumps was in seconds with no lengthy descent time as altitude was minimal. As soon as the throttle was disengaged the device was shut off, a very simple operation and there was no report of any casualties.


Unidentified flying object


An unidentified flying object (usually abbreviated to UFO or U.F.O.) is any unusual apparent object in the sky whose cause cannot be identified by the observer, or (in a narrower definition) by investigators; though in popular usage it more loosely means alien spacecraft, being one explanation (among several) offered for such sightings. Though UFO sightings have occurred throughout history, modern interest in them dates from World War II, since when governments have investigated UFO reports, often from a military perspective, and UFO researchers have investigated, written about and created organizations devoted to the subject.
Studies have established that the majority of UFOs are observations of some real but conventional object—most commonly aircraft, balloons, noctilucent clouds, nacreous clouds, or astronomical objects such as meteors or bright planets – that have been misidentified by the observer as anomalies, while a small percentage of reported UFOs are hoaxes. However, after excluding these incorrect reports, between 5% and 20% of the total remain unexplained, and so can be classified as unidentified in the strictest sense. Many such reports have been made by trained observers such as pilots, police and the military; some involve radar traces, so not all reports are visual. Proponents of an extraterrestrial hypothesis believe that these unidentified reports are of alien spacecraft, though various other hypotheses have been proposed.
While UFOs have been the subject of extensive investigation by various governments, and some scientists support the extraterrestrial hypothesis, few scientific papers about UFOs have been published in peer-reviewed journals.There has been some debate in the scientific community about whether any scientific investigation into UFO sightings is warranted.
UFOs have become a prominent theme in modern culture, and this cultural phenomenon has been the subject of academic research.

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