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Some Russian academic archives discuss "unmanned balloons" as the early precursors to drones. For example, papers from the Scientific Society describe the transition from 18th-century balloons to timed explosive devices (like those by Charles Kettering).

To help you find the exact file or document, could you clarify:

The term "paper for balloons" often refers to chipboard or specific patterned cardstock used in scrapbooking projects. 🏛️ Historical/Technical Context