Armstrong Whitworth Armadillo
The Armstrong Whitworth Armadillo was a British single-seat biplane fighter aircraft built by Armstrong Whitworth. == Development and design == The Armadillo was designed in 1917 by Armstrong Whitworth's new chief designer, Fred Murphy, as a private venture single-seat fighter powered by a Bentley BR2 rotary engine.
Source: Wikipedia — Armstrong Whitworth Armadillo (CC BY-SA 4.0)