Grenat
A planned 25 meter rocket that would carry up to 1,000 kg to low Earth orbit using engines that consume their own structure. First flight is expected in 2028.
Why it matters
In most rockets the empty tanks are dead weight. If the structure itself is burned as fuel, the rocket gets lighter as it climbs, which could let a smaller vehicle carry more.
How the technology works
The engine uses a tube of solid fuel with liquid oxidizer sealed inside. Pistons push the tube into the combustion chamber, where a catalyst turns the oxidizer into hot gas that burns the fuel tube itself.
Sources
Updated Oct 22, 2026 · How we source facts · Suggest a correction