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Topic : ISRO Tests 3D-Printed Rocket Engine

GS-3 Mains : Sci. & tech.

Revision Notes

Question : Examine the significance of ISRO’s successful testing of a 3D-printed rocket engine, highlighting its implications for India’s space program and the advancement of additive manufacturing technology in the aerospace industry.

ISRO’s Success:

  • Successfully tested a liquid rocket engine using 3D printing technology.

Engine Details:

  • PS4 engine designed for the fourth stage of PSLV.
  • Uses bipropellant combination (fuel & oxidizer).
  • Redesigned for 3D printing, reducing parts from 14 to 1.
  • Laser Powder Bed Fusion (LPBF) technique used in 3D printing.

3D Printing Technology:

  • Creates a 3D object from a digital CAD file layer by layer.
  • Uses various materials like plastic, composites, or bio-materials.
  • Widely used in aerospace, biomedical, and automotive industries.


  • Manufacturing complex parts, medical education, and cancer research.
  • Creating artificial tissues, organs, and prosthetics.
  • Printing engine parts, sport shoes, and endodontic guides.

3D Printing in Construction Industry


  • Unprecedented design freedom.
  • Reduced material waste.
  • Significantly faster construction times.
  • Enables creation of complex architectural forms.
  • Allows customization and optimization of building components.
  • Precise control over material distribution for efficient structures.


  • Lack of understanding about 3D printing technology.
  • High cost of 3D printer parts.
  • Limited investment and R&D centers for 3D printing.

Future Outlook:

  • 3D printing is a powerful technique in advanced manufacturing.
  • Future applications include “print-it-all” structures.
  • Increased user understanding will drive adoption.
  • ISRO’s 3D-printed rocket engine is a significant step.
  • Paves the way for advanced manufacturing in India’s space program.


Source : https://indianexpress.com/article/explained/explained-health/flirt-new-covid-variant-kp2-9324182/

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