Basic trainer glider The R-16 Butterfly was designed by Ernő Rubik as a single-seater, light glider with a canvas-covered wooden airframe. It was used for basic training with winch launch. Rubik designed this aircraft at the same time as the two-seater R-15 Koma. The two aircraft were not only very similar but most of the parts were actually identical. Application The R-16s were used for training purposes by the Hungarian National Aviation Association until the mid-1960s. Student pilots completed their first individual flight after training on the two-seater Koma. 65 aircraft were produced at the Sports Goods Manufacturing Company in Esztergom. The plane exhibited here was produced in 1952. Serial number: E-952.