Two popular Czech light aircraft from the 20th century, nicknamed "boska". This name came from the first several machines from the Avia aircraft factory. A property both these two models shared was an unusual and modern (at the time) monoplane design.

Both models, the BH-9 and BH-10 had the same wooden construction. The BH-9 was a two-seater intended for training and courier flights; the BH-10 was a single-seater intended as an aerobatic trainer.