Isro successfully tests hybrid engine and plans new rocket propulsion system


The Indian Space Research Organization (ISRO) has successfully tested a hybrid engine, potentially paving the way for a new propulsion system for future launch vehicles.

The 30kN hybrid engine tested at the ISRO Propulsion Complex (IPRC) at Mahendragiri in Tamil Nadu on Tuesday is scalable and stackable, the Bengaluru-based space agency said.

The test was supported by ISRO’s Liquid Propulsion Systems Center (LPSC).

The engine used hydroxyl-terminated polybutadiene (HTPB) as fuel and liquid oxygen (LOX) as oxidizer.

Unlike solid-solid or liquid-liquid combinations, a hybrid engine uses solid fuel and liquid oxidizer, it was noted.

“Today’s (Tuesday) test of a 30 kN equivalent hybrid engine in flight demonstrated ignition and sustained burn for the expected duration of 15 seconds. Engine performance was satisfactory,” a statement said. of ISRO.

The use of liquids facilitates throttling and the flow control of LOX allows the ability to restart, it was explained.

Although both HTPB and LOX are green, LOX is safer to handle, ISRO noted.

“The hybrid engine tested today (Tuesday) is scalable and stackable, potentially paving the way for a new propulsion system for future launchers,” he said.

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