Currently, space transportation industry is dominated by two propulsion technologies: the liquid propellant engine and the solid propellant engine. Both of these technologies have their own advantages but they come with tradeoffs and drawbacks. They are far from ideal propulsion systems.
A third propulsion technology exists, called hybrid. Hybrid Rocket Engines have the potential of featuring the advantages of both liquid and solid propulsion technologies. They could become the best propulsion technology for space transportation in the near future!
The Cornelian dilemma of space propulsion. Hybrid Propulsion for Space wants to create the best of propulsion technologies using Hybrid Rocket Engine.