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EPR Proprietary I Licensed Material
Rolls-Royce Aero-Derivative Combustion Turbine Background
2-13
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
Starting Means
Hydraulic Starter via radial
drive gearbox on HPC
Hydraulic Starter via radial
drive gearbox on HPC
Hydraulic Starter
(250 kW motor)
Hydraulic Starter
(250 kW motor)
Compressor
Variable Stages
1 stage of 34 VIGV's
1 stage Solid Variable Inlet
Guide Vane (VIGV)
Revised VIGV Control
RVDT (Rotary Variable Diff.
Transformer)
IGVs in Front of the LPC
IPC has Stage 1 VIGV's
IPC has 2 rows of VSVs
HPC has no variable stators
IGVs in Front of the LPC
IPC has Stage 1 VIGV's
IPC has 2 rows of VSVs
HPC has no variable stators
Compressor
Blades
LPC Titanium Blades coated
with Sermetel "W"; HPC
Blades Stage 1 Ti, Stg 2-6
Stainless Steel
LPC Blades-Titanium
IPC Blades-Titanium
HPC Blades 1,2 - Titanium
HPC Blades 3,4,5 - Nimonic
LPC Blades-Titanium
IPC Blades-Titanium
HPC Blades 1,2 - Titanium
HPC Blades 3,4,5 - Nimonic
Compressor
Vanes
First stage (34) VIGV's,
Stages 2 thru 7 fixed on IP
Compressor. 6 fixed stages
of stators in the HP
Compressor
Redesigned Stage 5 stator,
Hard-faced stage 6 stator,
First stage (34) VIGV's,
Stages 2 thru 7 fixed on IP
Compressor. 6 fixed stages
of stators in the HP
Compressor Revised OGV
ring ( Stage 7) fitted to IP
Compressor.
LP - 1 variable 2 fixed
IP 2 Variable 7 fixed HP 8
fixed
LP - 1 variable 2 fixed
IP 2 Variable 7 fixed HP 8
fixed
Compressor
Rotor
IPC Welded Drum SS & Ti
HPC Welded Drum Ti
Trent 800 HPC Compressor
LPC Operates at 3600 or
3000 RPM without the need
for a reduction gear. The
LPC blades are changed for
50 Hz Operation.
LP - 2 Stage IP - 8 Stage
HP - 6 stages
LPC Operates at 3600 or
3000 RPM without the need
for a reduction gear. The
LPC blades are changed for
50 Hz Operation.
LP - 2 Stage IP - 8 Stage
HP - 6 stages
Compressor
Casings
Air Intake Al Alloy Casting
IPC Casing Al Alloy Casting
HPC 12% Cr SS
Single Skin Inlet Bullet-nose
with the elimination of anti-
icing (-24G and -24GT)
LPC Outer Case is Split to
Access the LPC Stators
LPC Outer Case is Split to
Access the LPC Stators
Turbine Casings
Turbine Casing Nimonic PE.
16
Single Piece Frame Turbine
Support