Page 30 - AAA MAY - JUNE 2016 Online Magazine

FEATURE AERO ENGINES

Pratt & Whitney Canada will deliver the
PurePower PW814GA and PW815GA
engines, for the Gulfstream G500 and
G600 as an Integrated Power Plant
System (IPPS), which comprises the
engine, nacelle, and thrust reverser
systems
OPPOSITE PAGE: GE’s Passport will
power Bombardier’s Global 7000 and
Global 8000 business jets and the
engine uses a scaled down version of
the CFM International LEAP core
Unlike Safran, its partner in CFM Twin-Annular, Pre-Swirl (TAPS) combustor share lessons learned as both programs
International, seems to be having an easier featuring additively manufactured fuel progress through certification testing.”
time with development of the all new GE nozzles. The high-pressure turbine features Just as the military engine pedigree
Passport engine which makes use of a ceramics matrix composite shrouds and available with Snecma, the Passport
smaller core the highly successful new LEAP the blades in the low-pressure turbine are and LEAP engines also have a military
engine developed for next-gen passenger made from titanium aluminide (Ti-Al). The background. The “cores” which consists
jets. The LEAP from CFM International, which Passport is the powerplant for Bombardier’s of the compressor, combustor, and high-
is a 50:50 joint venture between GE Aviation Global 7000 and Global 8000 business jets. pressure turbine, for both engines have their
and Safran (Snecma) has already notched “Passport is like a scaled version of the LEAP roots in the GE F101 engine that powered
up in excess of 10,500 orders for all three core,” according to Shawn Warren, general the U.S.AF B-1 strategic supersonic bomber
engine models. Amongst its key innovations manager of the Passport program. “They are in the seventies. Flight certification testing
are; 3-D woven carbon fiber composite fan very similar, which is great for both programs for the engine began in December 2014
blades and fan case, 4th generation three because we not only share the differentiating and company officials are confident of the
dimensional aerodynamic designs and technologies for cost savings, but we also Passport obtaining U.S. Federal Aviation

Keeping up with Expectations

the integrity of the engine, not its ability
to meet certification requirements, have
been called into question,” and also added,
“We are deploying all the resources needed
to meet our commitments and ensure
that Silvercrest will be a success. These
required improvements, along with the
associated development plan, were
agreed jointly with Dassault, and are now
being deployed.” A new development
timetable for the Silvercrest has now
been agreed to by Dassault, which will
require new demonstration tests as
Snecma optimizes the design and produce
Snecma completed more than 4,000 hours but have also showed the need to carry new parts, which are long lead-time
of testing as part of ground and flight out additional developments in order to products. Based on the time needed for all
tests (flying testbed) with the Silvercrest extend the engine’s operational life and endurance and cold weather tests leading
engine in 2015, which included 500 hours in optimize its performance. In an email to ground and flight certification of the
flight, and over 100 flights in all. The engine response to Asian Airlines & Aerospace, a propulsion system, certification is now
has shown good operational performance spokesperson for Snecma said, “Neither expected in the spring of 2018.

30 ASIAN AIRLINES & AEROSPACE MAY/ JUNE 2016 WWW.GBP.COM.SG/AAA