m88の開発のほうが開発早いな

ttps://en.wikipedia.org/wiki/Snecma_M88?wprov=sfti1#Design_and_development

The SNECMA M88 engine main concepts and choices were settled at the end of the 1970's, both SNECMA and French Ministry of Defense

Component bench testing of the turbine sections began in 1978 seeking a TET of 1700K.
After initially promising results, this goal was raised to 1850K.
By 1987 this goal was reached and the first demonstrator engine, the M88-1 was presented for development.
In 1989 the engine M88-2 (Final production version) reached its designed maximum thrust