Turbofan

July 17, 2014 - 2:10am

The Engine Alliance, a 50-50 joint venture of GE and Pratt & Whitney, has received EASA approval for two new thrust ratings for the GP7200 turbofan engine, one of the two engines available to power the Airbus A380. The new ratings bring the GP7200 to four thrust rating configurations.

July 16, 2014 - 11:55am

The FAA is superseding emergency AD 2014-12-52 for all Honeywell TFE731-4, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, -40BR, -50R and -60 turbofans. It required a review of the engine logbook maintenance records to determine if any affected engines are installed and also prohibited operation of an airplane with two or more affected engines that have second-stage low-pressure turbine (LPT2) blades with fewer than 250 operating hours since new.

July 16, 2014 - 1:00am

The Bauhaus Luftfahrt aerospace think-tank in May unveiled a concept for a “propulsive fuselage” aircraft, opening a new possibility for fuel burn reduction. It is part of a European Union-funded project in cooperation with a number of research centers, as well as MTU Aero Engines and Airbus Group Innovations (OE13). The latter company is also studying a hybrid-power regional airliner with Rolls-Royce (Hall 4 Stand H3). Meanwhile, it is flying a hybrid-lift quadcopter demonstrator for unmanned military and civil missions, the Quadcruiser.

July 15, 2014 - 2:20pm

Snecma recently started flight-testing its Silvercrest turbofan on a modified Gulfstream II, a Snecma senior executive confirmed last week. AIN understands that the trials are taking place from Sierra Industries’ base in San Antonio, Texas. The maiden flight had been postponed several times but the delay is not expected to have any effect on the engine’s certification, planned for next year. The Silvercrest will power the Dassault Falcon 5X and Cessna Citation Longitude.

July 14, 2014 - 1:33pm

The Australian Transport Safety Bureau (ATSB) reported last month that with 5.5 million flight hours recorded on turbofan engines between 2008 and 2012, only 280 powerplant incidents were recorded, or about one every 20,000 flight hours. Of those 280 occurrences, 98 percent could be classified as low risk; four were classified as medium risk, two as high risk and one as a very high risk. None, however, resulted in any injuries to passengers or crew.

July 14, 2014 - 8:10am

GE Aviation is preparing to begin flight tests of its new Leap-1C and Passport engines featuring nacelles developed for them by the group’s Nexcelle joint venture with Safran subsidiary Aircelle. Last month, Nexcelle delivered the first full new-generation nacelles for both programs. They are due to fly soon on the engine maker’s Boeing 787 testbed. The Leap-1C is to power Comac’s C919 narrowbody airliner, while the Passport has been selected for Bombardier’s Global 7000 and 8000 business jets.

July 14, 2014 - 7:50am
Titanium-aluminide low-pressure turbine blades and proposed cooling arrangements on Rolls-Royce’s proposed future UltraFan engine may owe much to the RB3025 powerplant unsuccessfully offered to power the Boeing 777X. For example, the RB3025 featured a “vortex amplifier” to simplify turbine-blade cooling with HPC air.

New engines planned by Rolls-Royce (R-R) reflect recent powerplant trends, including steadily increasing propulsive efficiency obtained with larger-diameter fans, higher bypass ratios and smaller engine cores. The engines could power updated contemporary widebody platforms, with R-R civil large engines president Eric Schulz confirming “very live” discussions with Airbus. “If it decides to re-engine the A330 or A380, we will be here to provide support,” he said during a pre-show briefing.

July 14, 2014 - 6:20am
Pratt & Whitney expects to gain certification of the first version of the PW1100G for the Airbus A320neo during this year’s fourth quarter.

While calling extending its geared turbofan engine family’s thrust rating by another 2,000 pounds “a big deal,” Pratt & Whitney next-generation product family vice president Bob Saia sees still bigger things in the company’s future, including what he called an Advanced GTF that could rival an open-rotor design in fuel efficiency by the middle of the next decade. For now, though, Saia finds himself “busy as a bee” with the five core programs already under way at the U.S. company.

July 14, 2014 - 5:45am

Japan’s Technical Research and Development Institute (TRDI) has released images and footage of the ATD-X (advanced technology demonstrator-experimental), following the appearance of a privately taken blurred image a few weeks ago.

Made public this weekend, the new images were taken on May 14 and show the aircraft being moved out of the paint shop, resplendent in TRDI’s house colors and bearing the serial 51-0001. In April, Japan’s defense minister, Itsunori Onodera, told journalists that the ATD-X is scheduled to fly this year.

July 14, 2014 - 1:40am

The technology stakes are high for the GE9X engine that will power Boeing’s new 777X twinjet, but GE Aviation believes its big bet on the weight savings to be delivered by unprecedented use of composites is about to pay off. The U.S. engine maker, which currently holds orders for some 600 of the engines, is leaving nothing to chance and, with more than two years of technology maturation behind it, the company is now stepping up its test program en route to certification in 2018.

 
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