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exchange. Developing new and innovative products,
such as NextGen 'intuitive' avionics systems is one
area where this design philosophy is successfully
One example of the manufacturer's design acumen
is in the field of propulsion engines. According to
Karras, designing a wide range of highly reliable,
safe and powerful engines for business aviation
aircraft is one such area where the manufacturer
has successfully applied its considerable resources
and left its mark.
The company has provided highly efficient turbofan
engines to the business aviation industry since the
early '70s, and has since gone on to successfully
consolidate its position as a major engine provider
to the sector ever since.
"Our engines are very reliable and high
performing; and at the same time, we listen to our
customers, in terms of what they want and what
they need," Karras said.
"In terms of our product range, we provide great
value and are very competitive. We always look at
where we can add value and deliver more for our
customers," he added.
The company's first foray into the business aviation
engine market occurred in 1972 when it unveiled
the TFE731 turbofan. Since that time numerous
derivatives of the lean burning, highly efficient engine
have gone on to power some of the industry's most
notable designs. For example, the Learjet 31, 35/36,
45 and 55, the IAI Westwind 1124, the Falcon 10,
50 and 900, the Cessna Citation III, VI and VII, plus
the Hawker 125-700.
Karras said that 20 models of the venerable
TFE731 turbofan engine have been developed
since 1972, with over 100 million hours of service
life accumulated by them on a multitude of both light
and midsize jet aircraft types.
"The TFE 731 engine product line is still in
production today. They have been the most
successful business aviation turbofan engine in the
3,500-5,500lb class. Over 12,800 of them have
been delivered to customers to date, which includes
all versions of the engine," he said.
However, despite a preferential shift in the market
for mid-size, super mid-size and/or large cabin
business jets, Karras said Honeywell Aerospace's
practice of constant customer engagement placed
it in the ideal position of being able to offer a
correspondingly suitable range of engine options to
suit their needs.
The company's success in engine design
(amongst other things) can be partly attributed to its
respect for history -- and that lessons learned from
the past can be successfully applied to present and
ultimately future product designs. In that regard,
'lessons learned yesterday' are never discarded but
constantly incorporated into the design, evolution
and manufacture of the company's range of engine
"We see today's engine designs as a product of
continuous evolution. We look at the technology, and
we look at what we're offering. We focus our energy
on getting better and better," Karras said.
One business jet category that has witnessed a
spike in sales over the past decade or so, within
the broader business aviation market, is for super
Honeywell Aerospace has responded in kind by
developing a class of engine in the 6,500-7,500lb
thrust bracket to cater to the increasing demand for
aircraft in this category. It is the HTF7000 product
line and, like the TFE731 engine line that preceded
it, Karras said the engines in this category have
established a very strong presence in the midsize/
super mid-size categories by virtue of their ability to
"Our HTF 7000 product line engines have
accumulated more than 1.9 million flight hours.
They also have a 99.9% dispatch reliability rate
and they're very good, high-performing engines ...
These engines are on the Bombardier Challenger
300 and Gulfstream G250 aircraft, and they were
also chosen for the new Embraer Legacy 450,
Legacy 500, the Bombardier Challenger 350 and
the Gulfstream 280 aircraft," he said.
Karras said over 900 engines (all series of the
HTF7000 series combined, that is the HTF 7000,
7250G, 7350 & 7500E), were currently in service
around the world today.
He added environmental impact issues play a
major role in product design too, and that developing
engines that burn "leanly" and are environmentally-
friendly are significant factors Honeywell Aerospace
takes into account when designing its propulsion
products and systems.
"We're very big in the 'green areas' of engine
power production. That is, green engines lead to a
lot less noise and they are very efficient. But also,
by being 'greener' these engines have reduced
emissions and noise levels, and they run more
efficiently while generating more power."
While engines play a central role in determining
an aircraft's performance a lesser known, yet critical
system cannot be overlooked in the role it plays in
areas such as main engine starting, cabin cooling
and electrical power generation: the Auxiliary Power
As with its range of engines, Honeywell Aerospace
has a long legacy in designing APUs (it started
producing them in 1948), as well as an extensive
portfolio of them. There are currently 20 basic
Honeywell Aerospace APU models, which range in
power from 100 to 1,700shp.
They have found applications in the business
aviation, regional transport, commercial transport
(both narrow and wide body) and military arenas.
Today approximately 18,000 APUs are in service in
The TFE 731 business aviation engine
"We see today's engine designs as a
product of continuous evolution. We look
at the technology, and we look at what
we're offering. We focus our energy on
getting better and better."
Vice President marketing & product management propulsion engines,
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