gslv

 

GEOSYNCHRONOUS SATELLITE LAUNCH VEHICLE
(GSLV)

About the Launch Vehicle

Vehicle Specifications

Geosynchronous Satellite Launch Vehicle (GSLV), the fourth Generation Launch Vehicle of India is a three stage vehicle with four liquid strap-ons and is designed to inject 2 - 2.5 Tonne class of satellites into GTO. The first stage consists of a large solid rocket, derived from the PSLV first stage. It is augmented by four liquid fuelled strap-on boosters. Each booster is powered by a Vikas engine and remains connected with stage 1 during the flight. The second stage is a liquid fuelled stage featuring storable propellants. The indigenously developed cryogenic Upper Stage (CUS), which is flight proven, forms the third stage of GSLV Mk II. The Cryogenic Upper stage employs the vital technology that enhances the payload capability to make the vehicle suitable for launching communication satellites. From January 2014, the vehicle has achieved four consecutive successes. Further, GSLV's capability of placing up to 5 tonnes in Low Earth Orbits broadens the scope of payloads from heavy satellites to multiple smaller satellites.  
Height  : 49.13 m
Number of Stages  : 3
Lift Off Mass  : 414.75 tonnes
First Flight  : April 18, 2001

 

TECHNICAL SPECIFICATIONS

Payload to GTO: 2,500 kg

GSLV's primary payloads are INSAT class of communication satellites that operate from Geostationary orbits and hence are placed in Geosynchronous Transfer Orbits by GSLV.

Payload to LEO: 5,000 kg

Further, GSLV's capability of placing up to 5 tonnes in Low Earth Orbits broadens the scope of payloads from heavy satellites to multiple smaller satellites.

Third Stage: CUS

Developed under the Cryogenic Upper Stage Project (CUSP), the CE-7.5 is India's first cryogenic engine, developed by the Liquid Propulsion Systems Centre. CE-7.5 has a staged combustion operating cycle.

Fuel LOX + LH2
Max, Thrust 75 kN
Burn-time 720 sec

 

Second Stage: GS2

One Vikas engine is used in the second stage of GSLV. The stage was derived from the PS2 of PSLV where the Vikas engine has proved its reliability.

Engine Vikas
Fuel UDMH + N2O4
Max. Thrust 800 kN
Burntime 150 sec

 

First Stage: GS1

The first stage of GSLV was also derived from the PSLV's PS1. The 138 tonne solid rocket motor is augmented by 4 liquid strap-ons.

Engine S139
Fuel HTPB
Max. Thrust 4700 kN
Burntime 100 sec

 

Strap-on Motors

The four liquid engine strap-ons used in GSLV are heavier derivatives of PSLV's PS2, and use one Vikas engine each.

Fuel UDMH + N2O4
Max. Thrust 689 kN
Burntime 160 sec

 

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