RAA 2011: GE engine core for Global 7000 pegged for NG34

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GE plans to use the same core featured in the recently renamed "Passport" engine powering the Bombardier long-range Global 7000 and 8000 business jets in the next generation NG34 of its widely operated CF34-8 and -10 models.

The "eCore" technology is also featured in the Leap X engine that has been selected to power the Airbus A320neo.

During a briefing on 17 May at the RAA annual convention in Nashville, Tennessee, GE general manager of commercial and large business aircraft engines Chuck Nugent said the NG34, which aims to maintain the durability and reliability of current CF34 -8 and -10 models while reducing operating costs by 10-15%, could be available in the 2016 and beyond timeframe.

GE is also using technology leveraged from its widebody programmes - the GE90, GP7000 and the GEnx - on the NG34 programme.

Nugent said the NG34 core will feature a 10-stage high pressure compressor with a ratio of 22:1, the GE twin annular pre-mixed swirled (taps II) combustor, next generation high pressure turbine blade material and cooling, GEnx wide chord technology and a composite fan case.

GE envisions up to a 15% improvement in specific fuel consumption on the NG34, said Nugent, 45% driven by a higher bypass ratio, 45% from core technologies and 10% from improved integration of nacelle systems and the engine.

Queried about customer interest in the NG34, Nugent said: "It's a mixed answer there." Without a defined aircraft to outline the specific parameters of the NG34 Nugent said GE is "somewhat limited in saying what it can do".

"On the other hand," he said, a lot of interest exists among airlines in the NG34 capabilities as they consider their long-range aircraft planning.

Testing of the NG34 advanced core technologies is underway, and GE plans to start testing of the second core demonstrator in mid-2011.