It is actually using a hollow cylinder of acrylic as the fuel, with gaseous oxygen as an oxidizer. We’re already quite familiar with solid rocket propellant, but this hybrid approach is much ...

A solid-propellant rocket or solid rocket is a rocket with a rocket engine that uses solid propellants (fuel/oxidizer). The earliest rockets were solid-fuel rockets powered by gunpowder; they were ...

In a premixed flame, the fuel and oxidizer are mixed before reaching the flame. The stoichiometry of the mixture can be controlled by changing the fuel to oxidized ratio, and an inert gas such as ...