THE HISTORY OF AIRCRAFT ENGINE
反复和排比的区别
展会计划
GE AVIATION: NINE DECADES THAT CHANGED THE WORLD
When the United States entered World War I in 1917, the U.S. government arched for a company to develop the first airplane engine "booster" for the fledgling U.S. aviation industry. This booster, or turbosupercharger, installed on a piston engine, ud the engine's exhaust gas to drive an air compressor to boost power at higher altitude.
培训心得General Electric accepted the challenge first, but another team also requested the chance to develop the turbosupercharger. Contracts were awarded in what was the first military airc
raft engine competition in the U.S.A. Under wartime crecy, both companies tested and developed various designs until the Army called for a test demonstration.
In the bitter atmosphere of Pikes Peak, 14,000 feet above a level, General Electric demonstrated a 350-horpower, turbosupercharged Liberty aircraft engine and entered the business of making airplanes fly higher, faster, and with more efficiency than ever before. That mountaintop test of the first turbosupercharger landed GE's first aviation-related government contract and paved the way for GE to become a world leader in jet engines. 优秀学生演讲稿
蔺相如的故事
For more than two decades, GE produced turbosuperchargers that enabled aircraft, inclu
ding many in rvice during World War II, to fly higher, with heavier payloads. The Company's experti in turbines in general and in turbosuperchargers in particular figured significantly in the U.S. Army Air Force's lecting GE to develop the nation's first jet engine.
Since then, the aircraft engines division of GE Aviation has scored many firsts. Among them: America's first jet engine, the first turbojet engines to power flights at two and three times the speed of sound, and the world's first high bypass turbofan engine to enter rvice.
Today, GE Aviation's aircraft engines division, with revenues of $10.97 billion in 2003, designs, develops, and manufactures jet engines for a broad spectrum of military and commercial aircraft as well as aeroderivative gas turbines for marine applications. In addition, GE Aviation is the world's leading integrated engine maintenance resource.
GE BUILDS AMERICA'S FIRST JET ENGINE
诱导阻力
Becau principles and challenges in turbosuperchargers apply to gas turbines as well, GE was a logical choice to build America's first jet engine.
In 1941, the U.S. Army Air Corps picked GE's Lynn, Massachutts, plant to build a jet engine bad on the design of Britain's Sir Frank Whittle. Six months later, on April 18, 1942, GE's engineers successfully ran the I-A engine.
In October, 1942, at Muroc Dry Lake, California, two I-A engines powered the historic first of a Bell XP-59A Airacomet aicraft, launching the United States into the Jet Age. (The thrust rating of the I-A was 1,250 pounds; the thrust rating of the GE90-115B is more than 90 times as great at 115,000 pounds.
梦之雪The I-A engine incorporated a centrifugal-flow compressor, as did the increasingly more powerful engines developed by GE over the next two years, culminating in the J33 engine, which was rated at 4,000 pounds of thrust. The J33 powered the first U.S. Army Air Corps' first operational jet fighter, the P-80 Shooting Star, to a world's speed record of 620 miles per hour in 1947. Before the end of that year, however, a GE J35 engine power五行取名查询
ed a Douglas D-558-1 Skystreak to a record-breaking 650 miles per hour. The J35 was the first GE turbojet engine to incorporate an axial-flow compressor--the type of compressor ud in all GE engines since then.
However, the Air Corps, concerned about disrupting supplies of turbosuperchargers, placed production of GE's jet engines with other manufacturers. GE then t about designing another. The resulting J47 put GE back in the business of building jet engines. But demand for the J47 to power almost all the new front-line military aircraft, particularly the F-86 Sabre Jet, meant the Lynn plant could not keep up. GE needed a cond factory.
GE lected a federally owned plant near Cincinnati, where Wright Aeronautical piston en
gines had been produced during World War II. GE formally opened the plant on February 28, 1949, with the cond J47 production line, to complement the original line at Lynn. Later, the plant would be known as Evendale and would become GE Aviation's world headquarters.
With the Korean War boosting demand, the J47 became the world's most produced gas turbine. More than 35,000 J47 engines were delivered by the end of the 1950s. That engine scored two major firsts: it was the first turbojet certified for civil u by the U.S. Civil Aeronautics Administration, and the first to u an electronically controlled afterburner to boost its thrust.
The war created a boom environment. A ten-fold increa of GE employees in Evendale resulted (from 1,200 to 12,000 people in 20 months), requiring a tripling of manufacturing space. In 1951, GE announced that the Evendale plant would be one of the world's truly great jet engine centers in peace and war. In 1954, the Evendale manufacturing complex, virtually empty just six years earlier, was designated as GE's production facility for large j
et engines while its sister plant in Lynn, Massachutts, focud on developing and producing small jet engines.
