Labels:box | bulletin board | envelope | extrados | paper | sky OCR: Multiple stages were the innovation that finally allowed rockets get off the ground Robed CYodds Rockets need a tremendous amount of fuel to create adequate thrust ito defy orav But large fuel I tanks emptied soon after take of became pead weight holding the rocket back. Detaching spent tanks pud letting them fall back to Fart lightened the load GODDA RD'S MULTI-STAGE ROCKET BREAKTHROUGH finalls Robert thrusi gravity peap rocke Earth US4191
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