Thrust data analysis of India's solid rocket motors for PSLV, GSLV and SSLV
(mathematical analysis based on available data)

Norbert Brügge, Germany
 

PSLV & GSLV core stage motor S-138



20.21 x 2.80 m


    

    

 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

 S-138 Thrust ave 306.2 3,002.6 237 2324 347.4 3.407.2 269 2638 128.20 107 1.2916 364.6
Thrust max 435.5 4,270.3 494.2 4,846.9 1.8374

 

 

LVM3 booster motor S-200

 


21.92 x 3.20 m


    

   
 

 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

 S-200 Thrust ave 364.9 3,578.2 227 2226 441.2 4,327.1 274.5 2692 206.74 129 2.2203 556.5
Thrust max 504.0 4,942.5 609.5 5,976.9 1.6074

 

 

PSLV booster motors
 PSOM (XL)


10.06 x 1.00 (PSOM
~13.46 x 1.00 (PSOM-XL)

 


      



    
 

 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

 PSOM Thrust ave 46.4 455.0 229 2246 51.2 502.6 253 2481 8.92 44 0.2026 22.1
Thrust max 58.6 574.7 64.8 635.0 0.2559
 
 PSOM-XL Thrust ave 57.5 564.0 231 2265 63.5 622.8 255 2501 12.2 49 0.2490 30.5
Thrust max 65.9 637.2 71.7 703.5 0.2813

 

 

SSLV first stage motor
 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

 S-87 Thrust ave 176.2 1,728.2 237 2324 200.0 1,961.7 269 2638 87 117 0.7436 229.5
Thrust max 233.6 2,219.6 265.1 2,600.0 0.9856

 

 

PSLV
(H)PS-3 upper stage motor


3.60 x 2.00

              

 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

PS-3 Thrust ave - - - - 18.6 182.4 269 2638 7.6 110 0.0691 20.0
Thrust max - - 24.5 240.0 0.0910

 

 

SSLV second stage motor
 
  Thrust SL Isp SL Thrust vac Isp vac Propellant Burn time Flow rate

Total Imp. (vac)

MP  kN sec Ns/kg MP kN sec Ns/kg (t) (s) t/s

MN*s

SS-2 Thrust ave - - - - 18.6 182.4 280 2746 7.7 116 0.0664 21.1
Thrust max - - 25.5 250 0.0910