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Rolls-Royce Aero-Derivative Combustion Turbine Background
2-14
Design
Characteristic
RB211 – 6562
(RB211-24G Gas Generator
with RT62 Power Turbine)
RB211 – 6761
(RB211-24GT Gas
Generator with RT61 Power
Turbine)
Trent 60 DLE
(Derivative of AERO 800 on
Boeing 777 and Airbus
A330)
Trent 60 WLE
(Derivative of AERO 800 on
Boeing 777 and Airbus
A330)
Reliability, Maintainability, Durability
Comments
Turbine Vanes -
HP
Mar-M-002, Sermaloy J
coating, air-cooled
Mar-M-002, Sermaloy J
coating, air-cooled
MarM002, Pt-Al coating, air-
cooled
Identical to the Aero 800
except for minor film cooling
modification
MarM002, Pt-Al coating, air-
cooled
Identical to the Aero 800
except for minor film cooling
modification
Typically performs Hot Gas Path Inspections at
25,000 fired hours and turbine overhauls at
50,000 fired hours
Turbine Vanes -
IP
C1023, Sermaloy J coating C1023, Sermaloy J coating
MarM002, Pt-Al coating
Identical to the Aero 800
MarM002, Pt-Al coating
Identical to the Aero 800
Turbine Vanes -
LP
(see Power Turbine
description)
(see Power Turbine
description)
LPT-1,2 MarM002
LPT-3 C1023
LPT-4, 5 IN738LC
LPT-1,2 MarM002
LPT-3 C1023
LPT-4, 5 IN738LC
Turbine Blades -
HP
HPT-1 CMSX4 DS, Sermaloy
1515 coating, air-cooled
(upgrade from RB211 -24C)
Identical to the Aero RB211-
524G/H-T
HPT-1 CMSX4 Single
Crystal,
Sermaloy J Coating, air-
cooled
(was MarM002 with Pt-Al for -
24G prior to upgrade)
Identical to the Aero 800 - Air
Cooled
HPT Blades CMSX4, Single
Crystal
Platinum-Aluminide Coating
(cooling air from HPC-6)
Identical to the Aero 800 - Air
Cooled
HPT Blades CMSX4, Single
Crystal
Platinum-Aluminide Coating
(cooling air from HPC-6)
Uses blades directly from Trent 800, minor
changes in the film cooling pattern on the HP
Nozzle
Turbine Blades -
IP
Stage 1 LPT Blades CMSX4
(Directionally Solidified),
Coated with Sermaloy 1515
(upgrade from RB211 -24C)
Stage 1 LPT Blades CMSX4
(Directionally Solidified),
Coated with Sermaloy 1515
Identical to the Aero 800 -
Uncooled
IPT Blades RR3000,
directionally-solidified
(proprietary nickel-based
super-alloy)
Platinum-Aluminide Coating
Identical to the Aero 800 -
Uncooled
IPT Blades RR3000,
directionally-solidified
(proprietary nickel-based
super-alloy)
Platinum-Aluminide Coating
Turbine Blades -
LP
(see Power Turbine
Description)
(see Power Turbine
Description)
The first three stages of the
LPT are identical to Aero 800;
the last two stages have
increased expansion ratio to
extract all of the available
energy from the gas stream
for power production, having
larger gas path area and a
lower exit Mach Number than
the Aero 800
LPT-1 MarM002 LPT-2,3
IN713 LPT-4, 5 IN718
The first three stages of the
LPT are identical to Aero 800;
the last two stages have
increased expansion ratio to
extract all of the available
energy from the gas stream
for power production, having
larger gas path area and a
lower exit Mach Number than
the Aero 800
LPT-1 MarM002 LPT-2,3
IN713 LPT-4, 5 IN718