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Bi-propellent and Mono-propellent propulsion's

Mono propellent: rocket based system that uses only one line to the fuel so it can be powered by just the fuel without having to be oxidized hint mono

mono propellent

Bi propellent:Rockets that consist of two substances usually consisting of fuel and oxidizer.

Bi propellent

What is Dual Mode?

Bipropellant Rocket

Monopropellant Rocket Specs

What is the use?

The Dual Mode rocket system is a type of propulsion that combines bipropellant rockets and monopropellant rockets. Most of this type of propulsion is Hydrazine/N204. However, there is a secondary type, called MMH/Hydrogen-Peroxide, but it is not very common.

Dual Mode Propulsion System Rockets

A dual mode system is ideal for a deep space mission. The module (or in the future a shuttle) would achieve an initial launch by using the bipropellant and would finish the rest of the mission using the monopropellant.

Hydrazine/N204

Nicholas Romero

Niko Olvera

This form of propellant is a liquid fuel. It became prominent in the late 1950's. In the present, it is commonly used for satellites. It is a red-brown color and has a very putrid odor. However, it is used in the modern day in the dual mode systems. It has the distinction of being the most common type of propulsion system for dual mode systems.

MMH/Hydrogen Peroxide

How Dual Mode Systems Work

This type of propulsion system was created for war bombs originally in WWII, namely the V2 rocket. It was also used for attitude stabilization on space shuttles during the Apollo missions, the Lunar Lander Simulator, and the Bell X-1 rocket plane. When Hydrazine/N204 was discovered, MMH/Hydrogen-Peroxide's use was greatly diminished. In recent times, the more eco-friendly thinking of scientists has caused this type of propulsion to be used more often in projects.

In the initial launch stages of a dual mode system rocket, the bipropellant is used to achieve lift-off. The bipropellant fuel is ignited through pyrotechnic, electrical, or chemical igniters. Once out of orbit, the fuel and oxidizer is shut off and a monopropellant is used to complete the final stages of the mission. The monopropellant is ignited through chemical reactions.

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