Rolls-Royce Tay
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The Rolls-Royce Tay name is given to two Rolls-Royce jet engines.
- Rolls-Royce Tay (turbojet), the original turbojet design, a follow-on to the Nene that was used on small numbers in the 1950s
- Rolls-Royce Tay (turbofan), the newer turbofan design, a massively upgraded version of their famous Spey turbofan design and used in the Fokker F100