Hybrid rocket engine

Safe, easy-to-handle engines free from risk of explosion.
MJOLNIR SPACEWORKS (MSW) will provide a stable supply of low-cost hybrid rocket engines.

HOMEEngine

Feature

Hybrid system

Hybrid engines achieve propulsion through the combustion of plastic fuel and liquid oxygen. Since no explosives are used, the risk of fire or accidental explosion is extremely low, making the engines safe. The engines are also highly potent when operational, while the cost of safety management is reduced.

Common hybrid engines use plastics as fuel, which are less flammable than liquid hydrogen or other fuels. As a result, they are extremely safe, but on the other hand, their inefficient combustion means they may not produce enough thrust.

Professor Harunori Nagata of Hokkaido University has been working for a long time to solve this problem. By devising a completely new fuel structure that takes advantage of hydrodynamic properties, he has perfected a technology that improves combustion and maintains the safety of plastic fuel, while also increasing combustion efficiency.

By developing this technology, we have succeeded in increasing thrust to reach a commercial scale.

Safe and reliable hybrid combustion system
Fuel structure that enables high thrust
Inexpensive weldless tanks
Inexpensive weldless combustor

Comparison with other companies’ rocket engines

		Advantages	Challenges
Other companies	Solid Rocket engines	Low cost and high reliability due to simple composition	Difficult to adjust thrust and to extinguish/reignite engine High cost of manufacture/management due to use of explosive materials High risk of damage in case of explosion
	Liquid Rocket Engines	Thrust can be adjusted and engine can be extinguished/reignited Easy to achieve high thrust	High cost of manufacture/management due to complex composition and use of explosive materials High risk of damage in case of explosion
	Hybrid Rocket Engine	Simple composition and use of non-explosive materials means high level of safety and low cost of manufacture/management Thrust can be adjusted and engine can be extinguished/reignited	Difficult to improve thrust and specific impulse, so there are many issues to be solved for practical use
MJOLNIR SPACEWORKS	Hybrid Rocket Engine	Simple composition and use of non-explosive materials means high level of safety and low cost of manufacture/management Thrust can be adjusted and engine can be extinguished/reignited	Further development to overcome thrust and specific impulse issues, and to further increase the size of the engine

Lineup of Rocket Engine

Introducing MSW’s planned lineup of rocket engines.
We can also develop bespoke designs to meet your specifications.

Engine name	D370Single	D540Single	D370Cluster	D540Cluster
Thrust [kN]	15 ~ 40	30 ~ 150	MAX450	MAX450
Size [mm]	Φ370	φ540	Configuration to be considered upon request	Configuration to be considered upon request
Fuel	HDPE	HDPE	HDPE	HDPE
燃焼時間［sec］	20 〜 45	10 〜 100	20 〜 45	10 〜 100
Status	Under development	Planned Development	Planned Development	Planned Development