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The Gyron was also the first British engine designed for highly supersonic (Mach 2) flight. Its low pressure ratio was optimised for high speeds. When the Bristol 188 was conceived, Gyron and Gyron Junior were the only engines designed for the high speed flight regime that were likely to be available quickly. It wasn't at all clear then whether existing designs like the Avon, Sapphire etc were suitable for Mach 2+ speeds. The 188 was seriously overweight due to problems with the steel construction. Progress with it was glacially slow; it was supposed to help research technologies for the F155T fighter but arrived years too late to be of any use. It consumed £20 million (a substantial sum of money at the time) to no great purpose.
The Gyron was also the first British engine designed for highly supersonic (Mach 2) flight. Its low pressure ratio was optimised for high speeds. When the Bristol 188 was conceived, Gyron and Gyron Junior were the only engines designed for the high speed flight regime that were likely to be available quickly. It wasn't at all clear then whether existing designs like the Avon, Sapphire etc were suitable for Mach 2+ speeds.
The 188 was seriously overweight due to problems with the steel construction. Progress with it was glacially slow; it was supposed to help research technologies for the F155T fighter but arrived years too late to be of any use. It consumed £20 million (a substantial sum of money at the time) to no great purpose.
