777X Saga: Will Boeing Dump Everett?

martes, 24 de diciembre de 2013

777X Saga: Will Boeing Dump Everett?
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Brinkmanship dims hopes for Everett Boeing 777X assembly

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Un nuevo Boeing 747 aterriza en el Aeropuerto de Teruel - Europa Press

Un nuevo Boeing 747 aterriza en el Aeropuerto de Teruel - Europa Press
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Un nuevo Boeing 747 aterriza en el Aeropuerto de Teruel
Europa Press
Un cuarto avión, un Boeing 747 ha aterrizado esta mañana en el Aeropuerto de Teruel que confirma su papel como plataforma aeroportuaria con unas instalaciones únicas en Europa. Esta vez la aeronave procede de París y ha tomado tierra a las 12.31 ...

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Satellite Communications For Aircraft Reinvented

Satellite Communications For Aircraft Reinvented
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Says System Will Provided Full-Motion Video To Ground Stations Via Satellite In one year, Northrop Grumman Corporation took a satellite communications system normally used in space and transformed it into what the company says is a high-functioning, low-cost communications system that can be used on aircraft. The satellite communications (SATCOM) system was successfully demonstrated on board the company's Firebird demonstrator aircraft.

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Happy 50th Birthday to the Pratt & Whitney PT6 Engine

Happy 50th Birthday to the Pratt & Whitney PT6 Engine
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The First Production PT6 in December, 1963. Photo: Pratt & Whitney Canada

Today is the 50th birthday of the first delivery of the legendary Pratt & Whitney Canada PT6 turboprop. That first engine was delivered to Beech Aircraft Company for installation into an aircraft that would become the equally remarkable Beechcraft King Air.

The PT6 had its genesis at what was then the United Aircraft of Canada Limited factory in Longueuil, Quebec. In the mid-1950s, UACL had looked at the market and determined that there was a need for a small, efficient turboprop in the 500 shaft horsepower (SHP) range. They felt there was technology available to replace current radial piston engines that dated back to the 1920s, like the P & W Wasp. 

So in 1957, a group of 12 young engineers got together to design a powerplant that was unlike any engine of its time. Turboprops of the day were massive, such as the 4,000 SHP Allison T56 that powered the Lockheed C-130 Hercules, or they were early-generation and inefficient, like the Rolls-Royce Dart that flew on the Vickers Viscount.

The engineering team made design choices that would stand the test of time. They separated the gas generator and the power sections of the turbine. Think of your car – the gas generator in the PT6 is like your engine, and the power section is the transmission. Other turboprops had the gas generator directly connected to the power section. If that was in your car, it would be like trying to start and drive it with the transmission always engaged. By splitting the engine, starting was much easier and maintenance was hugely simplified. The design is also called a "free turbine".

P&WC PT6-powered DHC-3T Turbine Otter. The air travels 2 feet behind
the inlet before turning and entering the engine. Photo: Howard Slutsken

The team also decided to make the PT6 a "reverse flow" engine. If you look at a PT6A, say, on a deHavilland Canada DHC-3T Turbine Otter, you'll see that the engine's air inlet is under and behind the propeller. The air travels below and to the rear of the engine before it makes a 90-degree upwards turn, enters the generator, and changes direction a few times as it gets compressed and ignited. The exhaust is in the forward part of the engine, not in the back. If you look carefully at this video, you'll see how the air flows through the engine. The two main sections are separate, with the forward, power section driving the prop, and the rear, gas generator driving the accessories at the rear of the engine.

Since the first PT6 was delivered 50 years ago, Pratt & Whitney Canada has impressively improved the engine, taking advantage of the many advances in material technologies, manufacturing processes, aerodynamics, and electronics. Today's PT6 is up to four times more powerful than the first turboprop, with up to 20% lower fuel consumption.

P&WC PT6A-34s power the new Viking Twin Otter 400.  Photo: Viking Air

The PT6′s statistics are impressive. Over 51,000 engines have been produced, powering more than 130 different applications. There are more than 69 different models, from 500 SHP to over 2,000 SHP.  You'll find PT6s in planes and helicopters, and the engines have also powered boats, cars and trains. In 1967, a PT6-powered racecar even led the Indy 500 until 8 miles from the end, when a $6 transmission bearing failed.

BONUS: My Quest to Ride on a Beechcraft Starship: The EPIC Flight

You might have flown on an airline flight in a plane powered by the PT6, on a deHavilland Canada DHC-6 Twin Otter or DHC-7 STOLplane, a Beechcraft 1900, Shorts SD360, Embraer Bandeirante  or Pilatus PC-12. And there are a huge number of business-aircraft applications, including AirlineReporter.com's Editor's favorite, the Beechcraft Starship. PT6s, everywhere!

A Beechcraft Starship shows off its twin, pusher PT6A turboprops.

BONUS: List of PT6 Applications (click the "Aircraft" tab)

Over 7,200 operators worldwide are flying aircraft powered by the PT6, and have logged over 385 million flying hours. P&WC says that if you were flying a PT6-powered plane at a speed of 310 mph, that would be like going to the moon and back 250,000 times. If any engine could do that, it would be the PT6.

  Howard Slutsken – Senior Contributor 

Howard has been an AvGeek since he was a kid, watching TCA Super Connies, Viscounts and early jets at Montreal's Dorval Airport. He's a pilot who loves to fly gliders and pretty well anything else with wings. Howard is based in Vancouver, BC.

 @HowardSlutsken | Flikr

 

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Boeing y Cathay Pacific Airways anuncian un pedido de 21 unidades del 777-9X

Boeing y Cathay Pacific Airways anuncian un pedido de 21 unidades del 777-9X
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El pedido está valorado en más de 7.000 millones de dólares a precios de catálogo actuales.

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Photo: BA 747 wing tip collides with building while taxiing in Johannesburg

BA 747 wing tip collides with building while taxiing in Johannesburg
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A British Airways 747-400 aircraft suffered damage to its right wing as a result of a collision with a building at Johannesburg's OR Tambo International Airport.

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Peru to acquire 24 Mi-171s from Russia

Peru to acquire 24 Mi-171s from Russia
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The government of Peru has finalised an agreement with Russia to acquire 24 Mil Mi-171 Sh-P helicopters, according to a media release from Peru's minister of defence.

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Emirates Airline firms up order for 50 additional A380s

Emirates Airline firms up order for 50 additional A380s
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Total order rises to 140 A380s


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Andalucía subvenciona con 2,6 millones el vuelo Almería-Sevilla

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Eurocopter quiere restaurar su imagen tras varios accidentes de sus helicópteros

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China’s Black Hawk helicopter clone makes first flight

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Alenia Aermacchi M-346 selected as Polish Air Force’s future Advanced Jet Trainer

http://theaviationist.com/2013/12/24/m-346-selected-by-poland/

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British Airways 747 Wing Clips Airport Building In Johannesburg

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Evergreen Aviation Museum Faces Uncertain Future. Including the Spruce Goose

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India’s light combat aircraft Tejas receives Initial Operational Clearance-II

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Brasil recibiría para su principal unidad de cazas algunos Gripen usados antes de la llegada de los nuevos al desprogramarse los Mirage

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Ucrania y Rusia reanudarán la producción del Antonov An-124-200

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