RDRE

A rocket engine that burns by detonation, not deflagration — a continuous wave of combustion spinning inside an annular chamber to extract more energy from every kilogram of propellant.

Combustion, an order of magnitude faster.

Conventional rocket engines burn propellant in a slow, subsonic flame at roughly constant pressure. An RDRE instead sustains one or more detonation waves that race around a ring-shaped chamber thousands of times per second — combustion that is supersonic and produces a rise in pressure rather than a loss.

That pressure-gain cycle is thermodynamically more efficient, letting a smaller, simpler engine deliver more thrust from the same propellants.

Detonation propulsion, backed by decades of hard tech.

GTL has worked on rotating detonation rocket engines since early Air Force Research Laboratory (AFRL)-funded efforts, in which GTL designed and modeled liquid-injection RDE concepts and completed preliminary hardware designs.

Under a follow-on DARPA Phase II SBIR, GTL is finalizing, fabricating, and hot-fire testing those designs at the University of Tennessee Space Institute (UTSI) — complementing RDE work at AFRL, NASA, and elsewhere. Pressure-gain combustion of this kind can raise combustor efficiency by up to roughly 10%.

The engines are developed alongside GTL's lightweight cryogenic composites and the Nautilus launch vehicle — pairing a more efficient combustion cycle with the ultralight structures that make its performance count.