Grumman Tracked Levitated Research Vehicle (TLRV) . 1972 . An experimental “hovertrain” , part of a U.S. government initiative to develop high-speed ground transportation that could reach speeds up to 300 mph .
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April 30, 2026
The three turbofan engines on top provided the air for both levitation and forward thrust (aero-propulsion). by SevenSharp
Discussion in the ATmosphere