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That's the beauty of the second generation, smaller turbofans: RB.199, F404: smaller and lighter than Spey and TF30. Just compact enough to roll in place of Atar, Avon and J79 in the first generation Mach 2 fighters. Except the timing is all wrong: the aircraft are obsoletes and the turbofans are too late.A real missed opportunity related to the earlier generation of "compact turbofans" : J101 and RB.153 / RB.172 / M45. Imagine a scaled up F-5 with them (hello, F-20 except 15 years earlier) or the F-104 / F-4 / Mirage upgraded with these engines. For example a Mirage IVA with a pair of M45.There were a few interesting projects using these turbofans: HS.1173, P.141. Also the P.530 Cobra, the first iteration on the way to the Hornet.
That's the beauty of the second generation, smaller turbofans: RB.199, F404: smaller and lighter than Spey and TF30. Just compact enough to roll in place of Atar, Avon and J79 in the first generation Mach 2 fighters. Except the timing is all wrong: the aircraft are obsoletes and the turbofans are too late.
A real missed opportunity related to the earlier generation of "compact turbofans" : J101 and RB.153 / RB.172 / M45. Imagine a scaled up F-5 with them (hello, F-20 except 15 years earlier) or the F-104 / F-4 / Mirage upgraded with these engines. For example a Mirage IVA with a pair of M45.
There were a few interesting projects using these turbofans: HS.1173, P.141. Also the P.530 Cobra, the first iteration on the way to the Hornet.
