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Something I've learned from this thread is the evolution of Rolls Royce turbofans from Conway to Medway to Spey. Each step reduced LP compressor and increased HP compressor stages; 7-9, 6-11 & 5-12 and ever increasing bypass ratio; 30% (60% in final VC10 version), 70% & 100%.In my mind this means that the Spey wasn't simply a smaller version of the Medway, it had 1 less LP compressor stage, 1 more HP compressor stage and a greater bypass ratio. Perhaps the Spey used Medway components like the combustion cans, turbines etc.
Something I've learned from this thread is the evolution of Rolls Royce turbofans from Conway to Medway to Spey. Each step reduced LP compressor and increased HP compressor stages; 7-9, 6-11 & 5-12 and ever increasing bypass ratio; 30% (60% in final VC10 version), 70% & 100%.
In my mind this means that the Spey wasn't simply a smaller version of the Medway, it had 1 less LP compressor stage, 1 more HP compressor stage and a greater bypass ratio. Perhaps the Spey used Medway components like the combustion cans, turbines etc.
