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Rolls-Royce took over Bristol Siddeley in 1967 so the configuration for the RB199 was decided jointly, a three-shaft engine. The overall design concept for the international collaborative program, three shafts and a bypass ratio (BPR) of about 1.2, was decided by Rolls-Royce. The bypass ratio was chosen for long-range, with low fuel consumption ...
The Rolls-Royce AE 2100 is a turboprop developed by Allison Engine Company, now part of Rolls-Royce North America. ... with the first stage using single-crystal blades.
Blades made from equiaxed GTD-111 are being used in later stages. [29] EPM-102 (MX4 (GE), PWA 1497 (P&W)) is a single crystal superalloy jointly developed by NASA, GE Aviation, and Pratt & Whitney for the High Speed Civil Transport (HSCT). While the HSCT program was cancelled, the alloy is still being considered for use by GE and P&W. [32]
The Rolls-Royce Trent is a ... cooling air is bled from the compressor through laser-drilled holes in the hollow turbine blades, made from a single-crystal of a ...
However, the single-crystal copper not only became a better conductor than high purity polycrystalline silver, but with prescribed heat and pressure treatment could surpass even single-crystal silver. Although impurities are usually bad for conductivity, a silver single crystal with a small amount of copper substitutions proved to be the best.
Rolls-Royce Tay on a Fokker 100, with thrust reverser engaged. Originally designated 610-8, all but one training engine have now been converted to 611-8 standard. The newest variant is the 611-8C, which has cast HP1 turbine blades, larger fan from the 650-15, structural by-pass duct and FADEC.
The initial workshare was divided as follows: Turbomeca produced the compressor, gearbox, accessories and control system, Rolls-Royce manufactured the power turbine stage, while MTU was responsible for the combustor, high-pressure turbine, along with the final assembly of the entire first batch of engines. [20]
Single-crystal turbine blades cast in Mar-M200, giving further improvement of high temperature resistance, would also be developed through testing in J58 engines. Waspaloy was the most widely used alloy in the engine, from critical high-energy rotating compressor discs to components made from sheet.
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