J-2 rocket engine and rope: what they have in common

1. Step 1. J-2 rocket engine — is part of — Saturn V. Hydrogen engines on the upper stages.
2. Step 2. Saturn V — evolved from — V-2 rocket. Von Braun went from the V-2 to the Saturn.
3. Step 3. V-2 rocket — evolved into — R-7 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).
4. Step 4. R-7 rocket — evolved into — Soyuz. The Soyuz rocket belongs to the R-7 family.
5. Step 5. Soyuz — has part — Parachute. Landing by parachute.
6. Step 6. Parachute — has part — Rope. The lines are ropes.

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