V-2 rocket and shaduf: what they have in common

1. Step 1. V-2 rocket — evolved into — R-7 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).
2. Step 2. R-7 rocket — evolved into — Soyuz. The Soyuz rocket belongs to the R-7 family.
3. Step 3. Soyuz — has part — Parachute. Landing by parachute.
4. Step 4. Parachute — has part — Rope. The lines are ropes.
5. Step 5. Rope — is used in — Well. Water was raised with a bucket on a rope.
6. Step 6. Well — uses — Shaduf. Or with a well sweep.

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