An Unconventional Monoplane: A Low‐Wing Four‐Seater with Mono‐Spar Wings and Fuselage and Two Pobjoy Engines Available to Purchase

IN the August, 1929, issue of Aircraft ENGINEERING appeared the first technical description of his single‐spar wing, contributed by Mr. H. J. Stieger himself. The Mono‐Spar wing had then only just made its appearance, and a specimen, showing the principles of the invention, was then creating great interest at the Olympia Aero Show, on a stand which was visited by every aeronautical engineer who came to the exhibition. The Air Ministry had already shown its interest in the wing, and official tests carried out on an experimental wing to its order were referred to by Mr. Stieger in his article.