They did come about, in the late 60s. Williams worked on these to varying degrees of success. One of their designs became quite famous. The F107 powers the BGM-

They did come about, in the late 60s. Williams worked on these to varying degrees of success. One of their designs became quite famous. The F107 powers the BGM-109 Tomahawk and AGM-86 ALCM. https://www.smithsonianmag.com/air-space-magazine/the-little-engine-that-couldnt-6865253/ https://www.smithsonianmag.com/air-space-magazine/the-little...