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M-4S Satellite Launch Vehicles

M-4S Satellite Launch Vehicles

The first generation of the Mu series was the four-stage M-4S rocket. It utilized a gravity turn for its orbital insertion, and stabilized its attitude with tail fins and spin. It could send a 180 kg satellite into low earth orbit.

Mission by M-4S Launch Vehicle

The vehicle M-4S-1 is described as follows

    1st st. SOB 2nd st. 3rd st. 4th st.
Total length m 23.557 5.794 10.595 5.860 1.838
Maximum diameter mm 1410.0 310.0 1410.0 860.0 786.0
Weight (ig.) kg 43710 4166 13211 3273 509.4
Weight (b.o.) kg 19118 1482 6052 1282 140.5
Propellant weight kg 20522 2696 7146 1986 368.6
Mass ratio   2.2031   2.1808 2.5491 3.6235
Specific impulse sec 219.0 219.0 261.0 265.0 270.0
Center of gravity (ig.) % 61.98   63.74 56.74 60.60
Center of gravity (b.o.) % 46.10   52.53 43.72 45.82
Ix (ig.) kg.m.sec2 1610.1   329.82 34.89 3.445
Ix (b.o.) kg.m.sec2 660.41   152.73 12.74 0.8464
Iy (ig.) kg.m.sec2 134206   7181.5 563.05 7.8630
Iy (b.o.) kg.m.sec2 62307.6   4873.3 329.85 3.9039
Net payload kg       49.4 62.2(SA)
Gross payload kg       148.2 68.9
Nozzle expansion ratio   5.94 3.57 20.0 17.36 19.9
Nozzle exit diameter m 0.8626 0.0716 0.7595 0.3758 0.0745