The Hybrid rocket concept can be traced back at least 75 years.

It is also used as a hybrid rocket fuel.

Barbarella was the designation of the first German hybrid rocket.

One particular lesson came from choosing the oxidizer for their hybrid rocket motor.

A hybrid rocket usually has a solid fuel and a liquid or gas oxidizer.

For example, the hybrid rocket engine doesn't require storage of explosive propellants.

Stanford University is the institution where liquid-layer combustion theory for hybrid rockets was developed.

The new target looked very much like the AQM-37, but had the hybrid rocket engine.

The first consisted of three successful test firings of a single hybrid rocket motor in one day.

Several universities have recently experimented with hybrid rockets.

Both liquid and hybrid rockets use injectors to introduce the propellant into the chamber.

Consequently, hybrid rockets have recently been the vehicle of choice for low-budget private and academic developments in aerospace technology.

A hybrid rocket motor that's part solid rocket and part liquid.

Hybrid rockets also exhibit some disadvantages when compared with liquid and solid rockets.

Hybrid rocket engines use a combination of solid and liquid or gaseous propellants.

Hybrid rocket engines combine the two ideas.

Possibly the safest chemical rockets are the hobbyist's Hybrid rockets.

It has also completed solitary glides, although the hybrid rocket motor has not yet been fired.

Chuck Rudy flew a large monocopter with a hybrid rocket engine, using solid and liquid fuel.

Instead,Butterfly used a ram-augmented hybrid rocket engine.

There are a number of hybrid rocket motor systems available for amateur/hobbyist use in high-powered model rocketry.

The hybrid rocket engine was manufactured by SpaceDev.

On-orbit propulsion of the Dream Chaser is provided by twin hybrid rocket engines.

With liquid and hybrid rockets, immediate ignition of the propellant(s) as they first enter the combustion chamber is essential.

SpaceDev owns many of the patents and intellectual property rights associated with hybrid rocket motors used for safe human spaceflight.