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The L(Lambda)-4S rocket was the first rocket to be used by Japan to send a satellite into earth orbit. The L-4S project was to simulate the procedures and to demonstrate the capabilities for satellite insertion into orbit for the Mu project. The L-4S rocket system was a four-stage, all-solid propellant rocket.
Mission by L-4S Launch Vehicle
The L-4S-5 launch vehicle is described as follows
1st st. | SOB | 2nd st. | 3rd st. | 4th st. | ||
---|---|---|---|---|---|---|
Total length | m | 16.522 | 5.772 | 8.141 | 4.067 | 1.104 |
Weight (ig.) | kg | 9399.0 | 1005.0 | 3417.6 | 943.1 | 111.0 |
Weight (b.o.) | kg | 4507.0 | 381.0 | 1562.5 | 394.9 | 23.05 |
Propellant weight | kg | 3887.0 | 624.0 | 1845.0 | 547.5 | 87.95 |
Mass ratio | 1.982 | 2.187 | 2.388 | 4.816 | ||
Specific Impulse | sec | 215.0 | 220.0 | 242.9 | 249.3 | 254.0 |
Center of gravity (ig.) | % | 59.0 | 52.9 | 63.0 | 61.8 | 64.5 |
Center of gravity (b.o.) | % | 43.2 | 54.3 | 49.6 | 44.8 | 55.7 |
Ix (ig.) | kg.m.sec2 | 79.89 | 25.48 | 3.52 | 0.259 | |
Iy (b.o.) | kg.m.sec2 | 16192 | 1259.4 | 99.71 | 0.436 | |
Net payload | kg | 6.6 | 36.3 | 7.62 | ||
Gross payload | kg | 7.6 | 96.1 | 8.42 | ||
Maximum diameter | mm | 767.0 | 310.0 | 767.0 | 548.0 | 483.0 |