Proof that the boxy BH.1, and even its replica, could really fly.

The first product of the Avia company was the BH-1 (exp), a two-seat, low-wing braced sport monoplane built in Czechoslovakia in 1920. After its first flight, it was exhibited in Prague to an enthusiastic reception so that the Czechoslovakian president awarded Avia a 100,000 CSK development grant. The BH-1 was rebuilt as the (bis) with a more powerful rotary engine and was finally able to fly with two people aboard. The aircraft was damaged in a crash the following spring and was never repaired, having been surpassed by improved designs. In 2004, this flying replica of the (exp) was built.