Heinkel He 72 Kadett

Rarity: Common

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Invention

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Science and technology

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4

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What Wikipedia says

The Heinkel He 72 Kadett (Cadet) was a German single-engine biplane trainer of the 1930s. It was known to its pilots as the Zitterrochen (Quivering Ray) as it shook madly.

Excerpt from the Wikipedia article “Heinkel He 72 Kadett”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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