Work on the creation of a power plant for the PAK FA has stopped today at Saturn in connection with the lack of budgetary financing, Salyut alone is continuing work � the engine builders are awaiting the results of the tender which was announced a few days ago by the military industrial commission attached to the government of Russia. The question about the degree of state participation in the creation of the power plant also will be resolved,
Ué? Mas a KNAAPO diz outra coisa:
Another key feature distinguishing the
Su-35 from its Su-27-family predecessors is
its powerplant comprising deeply upgraded
enhanced-thrust engine developed by NPO
Saturn and dubbed ‘Product 117S’.
As far as the engine’s design is concerned,
it is a derivative of the production AL-31F,
using the fifth-generation technology. It
mounts the fan with a 3 % larger diameter
(932 mm over 905 mm), advanced high- and
low-pressure turbines and all-new digital
control system. A provision has been made
for using the thrust vector control nozzle
similar to that of the AL-31FP. The upgrade
has resulted in thrust hiking by 16 % to
14,500 kgf in afterburner mode and totalling
8,800 kg in the maximal non-afterburning
mode. Compared to the current AL-31F,
the new engine’s service life is to surge by
2–2.7 times, with the time between overhauls
increasing from 500 hours to 1,000 hours,
time before first overhaul standing at 1,500
hours and assigned life spiking from 1,500
hours to 4,000 hours.
Five prototype engines have been made
under the Product 117S test and debugging
programme. The first of them entered rig
tests in 2003, with two more having been used
in flight trials as part of the powerplant of the
Su-27M No. 710 flying testbed. The test flight
began in March 2004. About 30 test missions
were flown at their first stage, including five
on two engines. Then, the fourth example of
Product 117 replaced the first prototype on
the test bench while the fifth prototype was
used as a backup during the flight tests.
The rig tests have proven that the measures
taken resulted in a much higher performance
of the 117S engine compared with its
prototype, with the thrust and specific fuel
consumption requirements having been met
in spades. Saturn’s division at the Lytkarino
Machinebuilding Plant in the Moscow region
launched the endurance bench tests of the
117S engine in support of the maiden flight of
the Su-35, and one more engine of the type
will undergo a set of special tests there.
The production of the 117S is to be run
by the Ufa Engine Production Association
(UMPO) in the city of Ufa and NPO Saturn
in the city of Rybinsk. The partners decided
that all work on the 117S engine would
be shared by Saturn and UMPO on parity
basis. The Sukhoi design bureau, Saturn and
UMPO has funded the programme out of
their own pocket (40, 30 and 30 % respectively).
Saturn built the first two production 117S
engines and shipped them to KnAAPO for
flight tests on board of the first Su-35 flying
prototype earlier this year.
E assim, mais uma desculpa mulambenta se esvai.
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