The Russian Sukhoi T-50 5G fighter jet is equipped with cutting-edge
computerized life support systems, including an oxygen station securing
unlimited breathing gas supply and advanced pilot’s compensation system
that anticipates gravity overload.
The research and development enterprise Zvezda has announced the
final tests for its onboard oxygen generation system that will be
installed on all Russian operating fighter jets, including those to be
supplied abroad, Izvestia daily reports.
Unlike the 90 kilogram oxygen bottles system the new generator
weights a mere 30 kilograms, a crucial weight and space economy in
modern combat aircraft construction.
“Oxygen is produced from the atmosphere as the system takes it
from the engine’s compressors and redirects it to pilot’s mask. Flight
time no longer depends on oxygen supply,” Zvezda’s Chief Specialist Mikhail Dudnik told Izvestia.
It took five years to shape up the system, Dudnik said, but all four
Sukhoi T-50 PAK-FA 5G fighter jets currently undergoing flight tests
near Moscow were already manufactured with this system at a Sukhoi plant
in Komsomolsk-na-Amure – a city located in Russia’s Far East. The 5G
fighters made their way across the country without oxygen tanks onboard.
Soviet and Russian military aviation previously employed oxygen
bottles – an old, but time-tested technology. But it also imposed
certain restrictions on mission duration, because while refueling was an
option for many long-range military jets, oxygen re-supply was not. So a
pilot had to always keep a close eye not only on fuel, but also the
oxygen capacity of his aircraft, as elevations 4 kilometers or higher
require a breathable gas supply to avoid oxygen deficiency. An
unexpected leakage of excess oxygen spending could lead the failure or
termination of a vital mission.
Consequently, every Russian Air Force airfield is now equipped with
oxygen producing stations, which must be manned by experienced
personnel. Soon such stations will become a thing of the past.
The Sukhoi T-50 PAK-FA’s future major rival in the air, the American
5G F-22 Raptor fighter jet is equipped with its own On-Board Oxygen
Generation Systems (OBOGS) developed by Honeywell.
Many modern aircrafts, like the F-22, F-35, B-1B, B-2B, Eurofighter,
Gripen, Nimrod and others are equipped with this system. But only the
F-22 has been plagued by a persistent fault – a deficiency of oxygen in
the cockpit which leads to hypoxia.
Hypoxia occurs when the brain is starved of oxygen, causing
dizziness, disorientation, blackouts and finally loss of consciousness.
When operating a fighter jet that flies at nearly twice the speed of
sound, even a momentary lapse could lead to catastrophe.
At least 25 American pilots out of some 200 have reported dizziness,
disorientation and other symptoms similar to those associated with
hypoxia while flying the F-22 – the world’s most expensive fighter jet
– since 2008.
One pilot, Captain Jeff Haney, was killed in a November 2010 plane
crash that was believed to have been triggered by a malfunction with his
oxygen supply.
The US Air Force admitted that a ‘small number’ of F-22 pilots simply
refused to fly the stealth fighter until it is completely safe or have
asked to be transferred to operate different planes altogether.
After many months, the F-22s were grounded while technical
specialists attempted to improve the situation with pilots experiencing
breathing problems and coughing caused by the plane’s oxygen system. In
March 2013, US officials finally admitted they had no solution to the
problem.
Maj. Gen Charles Lyon, who headed the investigation, told Wired that
“the
Air Force will continue to explore further potential causes through
long term breathing air analysis and human systems integration efforts”, but that it will no longer investigate claims of coughing fits from F-22 ground crews.
The advanced flying characteristics and super-maneuverability of
Sukhoi T-50 fighter jet exposes pilot to extreme G-forces, actually
reaching the human ceiling limit. A T-50 pilot cannot actually use the
jet to its fullest potential without ultramodern technical assistance on
a variety of fronts.
That is why Sukhoi T-50 fighter jet pilot requires a brand-new
antigravity G-suit capable of compensating up to 9G for an unprecedented
30 seconds the plane is thrust into a bone-crashing missile evasion
maneuver.
The unique G-suit, developed by the same Zvezda enterprise, allows
the pilot to eject from the plane at the height of up to 23 kilometers.
The onboard computer anticipates overload and avoids the delay of the
system response to pressure compensation. The gravity compensation
system calculates everything, from the air pressure created in the rete
of flexible pipes entwisting the G-suit and supporting the pilot’s body
to the 6-7 atmosphere air pumped into pilot’s lungs to compensate the
external chest pressure and prevent him from blacking out.
“This system is our own know-how, no one in the world has managed to develop such a system so far,” Zvezda’s Chief Specialist Dudnik told Izvestia in early July.
A safe flight is a comfort flight and for military pilots, who are by
no means comic book heroes empowered with the ability to fly, must
answer nature’s call, particularly during long patrol missions. If there
is a pilot that can operate a supersonic fighter at a 20 kilometer
altitude for 12 hours straight, performing maneuvers, refuels etc., than
he is a true superhero and should be cloned.
Zvezda’s deputy chief designer Nikolay Dergunov informed Izvestia
that specially designed underwear is being tested to become an integral
part of PAK-FA pilot’s gear.
Some previous generation Soviet fighter jets were first equipped with
‘personal convenience’ systems in the 1990s after pilots flat out
refused to use diapers, arguing it was uncomfortable to operate a jet
while wearing them. But only on the PAK-FA it is fully integrated into
the pilot’s suit and does not divert his attention from the mission.
The PAK-FA pilot is going to be surrounded by gold at all times as
NPP Technologia enterprise in Russia’s Obninsk has developed a gold
coating for the cockpit which reduces radar’s ability to detect the
equipment by 250 times. The coating also protects pilot from high-energy
radar pulses and solar radiation.
The coating consists not only of gold, but a combination of various
metals, including stanum and indium, applied on the cockpit with a
specially developed magnetron installation.
The NPP Technologia enterprise, which also produces the majority of
composite elements for the Pak-FA hull, says all systems will are go to
supply all future 5G jets with golden cockpits once industrial
production of the aircraft starts in 2015.
After the collapse of the 1990s, Russia was lagging behind in the
development of digital ‘military and space’ grade electronics.
Therefore, developing a 5G fighter jet seemed to be impossible without
the complete modernization of electronic production in Russia, both
military and civilian, which has indisputably been achieved as evidenced
by the performance of the four PAK-FA jets during the test flights.
The Sukhoi T-50 fighter jet onboard information computation has been
shifted from the classic multicomputer system to the Integrated Modular
Avionic system, a long-anticipated change when a single processor
controls many processes aboard, attributing priority level to each
process and computing the most critical first, which prevents PAK-FA’s
computer from freezing.
It has been an absolute precondition that the Russian 5G fighter jet
will be using only domestically-produced electronic components and to
achieve this objective, the Russian electronics industry was forced to
undergo a revolution which ultimately proved successful.
RT.com