The Adcox Cloud Buster was a two-seat sporting biplane built by the students of the US Adcox Aviation Trade School in 1931. It was originally powered by a Salmson AD-9 engine of 40 hp (30 kW).
A single example was built, changing owners (and engines) several times before it was scrapped in 1938.
References
Adcox Cloud Buster Wikipedia(Text) CC BY-SA