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TV D1 Test Flight is accomplished. Crew Escape System performed as intended. Mission Gaganyaan gets off on a successful note.

October 18, 2023

Gaganyaan TV-D1 Mission

Mission Definition:

“In-flight Abort Demonstration of Crew Escape System (CES)” at Mach number 1.2 with the newly developed Test Vehicle followed by Crew Module separation & safe recovery.

Mission Objectives:

  • Flight demonstration and evaluation of Test Vehicle sub systems.
  • Flight demonstration and evaluation of Crew Escape System including various separation systems.
  • Crew Module characteristics & deceleration systems demonstration at higher altitude & its recovery

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Mission Highlights

TV Mission Pillbox
  • Mach 1.2
  • Altitude 11.7 km
  • Flight path angle 60°
  • Dynamic Pressure 22.6 kPa
CM-CES separation
  • Mach 0.5
  • Altitude 17 km
  • Dynamic pressure 2-3 kPa
Drogue Parachute deployment
  • Altitude 16.7 km
Main Parachute
  • Altitude ‹ 2.5 km

TV-D1 Vehicle:

The Liquid propelled single stage Test Vehicle uses a modified VIKAS engine with Crew Module (CM) and Crew Escape System (CES) mounted at its fore end.

Vehicle Configuration

Length: 34.954 m
Diameter: Ø 2.1 m (stage) , Ø 4.05 m (CES)
Liftoff mass: 44 T
TV inert mass: 7 T
CES inert mass:12.5 T
CM inert mass: 4.5 T

Propulsion System

TV : VIKAS Engine with AR6 , N2O4 – 12 T , UH-25 – 7 T
CES : HEM (4 nos.) + CJM

TV-D1 Crew Module (CM)

Specifications
Structure Single walled unpressurised aluminium structure Simulated thermal protection system using cork
Dimensions Ø3.1 m x 2.97 m
Mass 4520 kg
Avionics Launch Vehicle heritage with dual redundancy
Navigation Mini Advanced INS augmented by NavIC/ GPS
Deceleration system Total of 10 parachutes with pyro systems. Parachute deployment Initiation at 17 km altitude
Separation Systems
  • CM / SM separation
  • CM / CES separation
  • Apex cover separation
  • CES - CMF separation
Touch down velocity 8.5 m/s (Nominal)
Floatation system Buoyancy augmentation system using PUF blocks
Recovery aids Sea markers and location transmitter
TV-D1 Crew Module (CM)

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