Balloon wind-pressure diagram with French formula text – Vintage Wall Art
(Each image is professionally and digitally cleaned of artifacts such as color bars and extra borders prior to printing.)
Description
Balloon wind-pressure diagram with French formula text comes to life in this historic image, reproduced from the original with every detail intact. It is part of the Snapshots of the Past archive, gathered over 25 years of research.
The framed print arrives ready to hang; the unframed option suits custom framing. It brings character to any room and makes a memorable gift. Free shipping in the lower 48 states. Since 2001, Snapshots of the Past has shipped historic prints to tens of thousands of customers around the world.
Balloon wind-pressure diagram with French formula text
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The chart's most distinctive feature is its French formula text, which sets out how wind pressure acts on the curved surface of a balloon envelope. Diagrams like this belong to the early study of aerial navigation, when balloonists in France, the country that had produced the first crewed hot-air flights with the Montgolfier brothers in 1783, were trying to predict how gusts would push on a floating craft. Engineers of the period generally understood that the force of moving air rises with the square of its speed, so even modest winds could be dangerous to a balloon being inflated or towed. The diagram is a useful record of how that problem was reasoned out on paper before instruments and flight tests caught up.
| Original scan | 4,152 × 1,307 px · prints to 14 × 4 in at 300 dpi |
|---|---|
| Reference | 02528uFormule pour connaître la |
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