OSPE - The Voice - June 2017 - 25

Cover

WE'rE PrOuD TO bECOME gOODWIll AMbASSADOrS FOr CANADA
AND TO ShINE A lIghT ON ThESE PINNAClES OF ENgINEErINg SuCCESS.
WE hOPE TO INSPIrE CANADIANS TO uNDErSTAND AND APPrECIATE
ThEIr COuNTry IN A NEW WAy, SO ThAT ThEy FEEl PrOuD AND

hours. Using the Maintenance Steering Group
3 (MSG3) program, maintainers can follow a
structured schedule of inspection intervals and
maintenance tasks based off of the reliability of
the design of the aircraft.

run-dry transmission capability of over three
hours: Under Federal Aviation Regulation
(FAR) Part 29, a helicopter must be capable of
- Bob Dengler, P.Eng.
continued flight for at least 30 minutes after
the loss of lubricant from the main gearbox.
For its certification, the Bell 429's transmission
world, from the Canadian Coast Guard, to the Turkish National
demonstrated a run-dry time of over three hours. This is
Police, to VIP transport and emergency medical service teams
significantly longer than the run-dry times demonstrated on
saving lives around the world including on the Matterhorn in
most rotorcraft today.
Switzerland, to name a few.
Senior Technical Fellow Ed Lambert, and Bell 429 Chief
Conventional four-bladed, scissored tail rotor: The 429 is the
Engineer Zachary Dailey share some of the most unique
first commercial Bell helicopter to feature a tail rotor with
engineering and design features of the helicopter:
four blades. The use of four blades reduces the diameter of the
tail rotor, which reduces the tip speed required at a constant
Carbon fibre material design: Unlike the metallic composition
RPM. This in turn reduces noise generation while maintaining
of older helicopter models, the Bell 429's primary airframe is
the same amount of aerodynamic lift and antitorque for
made of aluminum with a body of 70-80% carbon fibre. The
the helicopter. The antitorque configuration enhances the
use of metallic and composite parts in its construction creates
helicopter's manoeuverability and prevents it from spinning
a balance between rigidity and flexibility, safety and durability.
in the opposite direction of the main rotor blades. The blades
are also spaced unequally on a scissored angle to prevent air
basiX-ProTm Integrated avionics system: This advanced
from travelling through the vortices at a constant, which would
avionics and systems monitoring suite is designed to be the
otherwise create a beating noise.
most "plug and play" system, not unlike a personal computer.
The comprehensive system features multi-functional displays
rupture or crash resistant fuel cells: The Bell 429 features
and an integrated electronic data recorder for enhanced
American Federal Aviation Regulation (FAR) and Canadian
situational awareness and post-flight analysis. Advanced
Aviation Regulation (CAR)-certified rupture resistant fuel cells
software programs perform work-reducing calculations like
that will not leak when dropped from a test height of 50 feet,
weight and balance, power assurance checks, self-diagnostics
thereby preventing post-crash fires. A number of other safety
and exceedance monitoring.
features also increase pilot and passenger survivability rates. The
Bell 429 includes crash attenuating seats and damage tolerant
single Pilot Instrument flight rules (Ifr) and autopilot:
blades that can withstand a considerable degree of maintenance
Unlike most helicopters of its class range, the basic Bell 429 was
induced or impact damage, including bullet holes.
designed for Single Pilot IFR, which enables a pilot to safely
fly using the avionics and instruments in the flight deck in
live mount vibration control: The Bell 429 is powered by twin
Instrument Meteorological Conditions, as opposed to having
Pratt & Whitney Canada engines that can climb greater than
a second pilot. The autopilot is a Bell-designed system that
2,000 feet per minute at max gross weight and can cruise at a
has been optimized so that the helicopter can conduct steep
maximum of 150 knots. Nonetheless, the 429's live mount liquid
9-degree GPS-guided IFR approaches that no other helicopter
inertial vibration eliminators ensure that the aircraft has the
in its class can accomplish.
lowest certified levels of vibration and smoothest ride quality
of all helicopters in its class. A European Union compliance
low maintenance requirements: The Bell 429 brings
assessment demonstrated that occupants can ride in the
maintenance in line with the zonal inspection process used in
Bell 429 seven times longer than any other light twin aircraft
the commercial airline industry. This means maintainers are no
on the market before experiencing discomfort or decreased
longer required to inspect the entire aircraft every few hundred
proficiency.
INVESTED IN buIlDINg ThE NExT 150 yEArS.

June 2017

The VOICe

25



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