Japanese Autogyro

Kayaba Ka.1 was powered by a 240hp Kobe engine (licence version of the German Argus As.10C); the first Ka.1 was flown on 26 May 1941 and eventually some 240 aircraft of this type were built. They were employed during World War 2 by the Imperial Japanese Army for artillery observation and cooperation duties, and by the Navy for coastal or carrier-based antisubmarine patrol carrying two 60kg bombs or depth charges. One Ka.1 was modified for trials with small auxiliary rockets at the tips of the rotor blades.

Source: Aviastar