Event Brief
Grumman ST-21 proposal for a super F-14 Tomcat
By The BriefBrief · Sources (1)
Filed: Sep 27, 2026 at 9:01 AM ET
Summary: Grumman pitched the ST-21 in the early 1990s as either a new-build jet or a remanufactured F-14 for the US Navy after the A-12 Avenger II was canceled in 1991. The design would replace the Tomcat’s glove vanes with enlarged gloves for better supersonic handling and more fuel, and add navigation improvements.
WHO: Grumman
WHAT: Proposed the ST-21 as a new-build or remanufactured F-14 with enlarged glove vanes and improved navigation for supersonic performance.
WHEN: 1991
WHERE: USA
WHY: The Navy sought a way forward after the A-12 Avenger II stealth attack jet was canceled in 1991.
How this brief is built: The BriefBrief uses multi-source information fusion to correlate reporting across sources, identify related developments, and continuously update a structured WHO, WHAT, WHEN, WHERE and WHY event picture. Pattern arcs, source analysis, and velocity indicators provide deeper analysis in our MI Console.
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