Sikorsky R-4

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

At a glance

Class

Invention

Domain

Science and technology

Knowledge cost

1

In collections

Nobody has pulled it yet.

What Wikipedia says

The Sikorsky R-4 is a two-seat light helicopter that was designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine.

Excerpt from the Wikipedia article “Sikorsky R-4”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: U.S. Coast Guard, Public domain, via Wikimedia Commons.