Gerry Doyle on Twitter: "anyway. the j-58 and sr-71/a-12 were real; the sr-72 and xf-103 exist only on paper. but the concept may be crucial to next-gen high-speed flight. and this concludes
Ramjet (Cyberverse) - Transformers Wiki
Ramjet | Transformers Universe MUX | Fandom
Ramjet (G1) | Teletraan I: The Transformers Wiki | Fandom