Why not J-58 clones

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6 years 11 months

Posts: 162

The SR-71 had the fabulous J-58. It main feature was the bypass tubes to feed the afterburner.

Does anyone know why none of the engine manuf never carried on with that technology?

Original post
Profile picture for user LMFS

Member for

1 year 9 months

Posts: 484

In recent times GE had the YF120 developed for the ATF, it was used as a base for the RTA-1 which was meant to work like a ramjet at high speeds and reach M = 4.1.

Interestingly this is roughly the same speed touted for the speculative MiG-41, so it is quite possible that such concepts are being entertained in Russia too.

Member for

6 years 1 month

Posts: 2,014

The SR-71 had the fabulous J-58. It main feature was the bypass tubes to feed the afterburner.

Does anyone know why none of the engine manuf never carried on with that technology?

Probably because there are no need at the moment

Profile picture for user Oxcart

Member for

12 years

Posts: 2,090

Because they went for stealth, not speed?