This helicopter was Raoul Hafner answer to the British Air Ministry March 1939 Specification S.22/38 which covered an experimental rotary-wing aircraft. Hafner’s P.D.6 was a neat original approach for the solution of helicopter control problems. Powered with a Propcher engine, his single-seater employed a aerofoil-shaped fuselage to counteract the power-driven rotor torque. A prototype was ordered, but the turmoil of the start of WW2 and the temporal detention of Hafner (he was an Austrian subject) put an end to the whole idea.
“Wellsian” someone said it was, Wellsian indeed.
Aviation Rapture 
He did get his vindication with the Bristol Sycamore! I still am fascinated by his Hafner Rotachute.
A pretty elegant design. Your fascination is well-based.