The 1930s saw wild aviation experiments, but the Stipa-Caproni stood out. Designed by Luigi Stipa and built by Caproni, this "flying barrel" featured a tube-like fuselage that funneled airflow for ...

However, [Dark Skies] in the video you can see below argues that the Stipa-Caproni was the direct predecessor of the turbofan engine. Either way, it is an interesting and unique part of aviation ...