How Hybrid Rockets Are made

Rockets Are used Fuel And Oxidizer To fly.

A rocket has two Tanks inside For fuel and oxidizer; Two valves Connect to the mixer, And a spark to Rocket Fly.

A hybrid-propellant rocket is a rocket with a rocket motor that uses rocket propellants in two different phases: solid and gas or liquid. The hybrid rocket concept can be traced back to at least the 1930s

Hybrid rockets avoid some disadvantages of solid rockets, like the dangers of propellant handling, while also avoiding some penalties of liquid rockets like their mechanical complexity.^[2]Because it is difficult for the fuel and oxidizer to be mixed intimately (being different states of matter), hybrid rockets fail more benignly than liquids or solids. Like liquid rocket engines, hybrid rocket motors can be shut down quickly, and the thrust is throttleable.

The theoretical specific impulse ( $I_{sp}$ ) performance of hybrids is generally higher than solid motors and lower than liquid engines. $I_{sp}$ as high as 400 s has been measured in a hybrid rocket using metalized fuels.^[3] Hybrid systems are more complex than solid ones, but they avoid significant manufacturing, shipping, and handling of solid rocket motors by storing the oxidizer and the fuel separately.

Nowadays, satellite technology development has become very intensive. Progress in satellite technology requires many desirable features from rocket propulsion. One of the most important is reducing the overall transport cost, concerning one kilogram of payload. Rocket engines are being used not only for launch vehicles. The application also includes satellite maneuvering and orbit transfer, space probe, and lander propulsion. There is an exciting new transport area called space tourism. To make Space widely accessible, it is necessary to reduce space transportation systems' development, production, and utilization cost. It must also not influence the safety level. Features including high performance, storability, non-toxicity, and safety of rocket fuels are required.

There are also many other features essential for a rocket engine. Among them, the most important are restart ability and throttling ability. A solid rocket motor cannot reach these features. Although a liquid rocket engine might be both restartable and throttleable, it is complicated and expensive to develop. Hybrid rocket propulsion is being considered in several specific areas of space transportation. Those applications are microsatellites (maneuvering and orbit transfer), lunar and planetary landers, suborbital and orbital tourism vehicles. Some of these applications have already been approved and are still being developed. The most positive qualities of hybrid propulsion are simplicity, safety, stop and restart, and throttling. Hybrid propellants are mostly storable and non-toxic. What is more,

fuel and oxidizer are separated and stored in different phases, which positively affects the safety level. The purpose of this study is to make an overview of hybrid rocket propulsion, including the history of research and technology development and recent application and future tendencies. Commonly used fuels and oxidizers are presented. The problem of low regression rate in a hybrid rocket motor is explained. There are also results of the own research presented in the article.

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