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What powered boat did Leonardo da Vinci design with paddle wheels turned by people inside the vessel?
Answer
Paddle-wheel boat
What textile machine did Leonardo da Vinci design to automate parts of silk production?
Answer
Silk-reeling machine
What portable military device did Leonardo da Vinci design to hurl stones using a spring-powered arm?
Answer
Spring catapult
What underwater breathing apparatus did Leonardo da Vinci sketch for divers exploring enemy ships?
Answer
Diving suit
What naval safety feature did Leonardo da Vinci sketch by placing two hulls side by side?
Answer
Double hull
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What textile machine did Leonardo da Vinci design to automate parts of silk production?
Answer
Silk-reeling machine
What carriage did Leonardo da Vinci design to move itself using a wound spring mechanism?
Answer
Self-propelled cart
What self-moving device did Leonardo da Vinci design that is often called an early robot?
Answer
Self-propelled cart