Sikorsky R-6

Rarity: Common

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At a glance

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Invention

Domain

Science and technology

Knowledge cost

3

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What Wikipedia says

The Sikorsky R-6 is an American light two-seat helicopter of the 1940s. In Royal Air Force and Royal Navy service, it was named the Hoverfly II.

Excerpt from the Wikipedia article “Sikorsky R-6”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Unknown author, Public domain, via Wikimedia Commons.