| Histoire résumée | The R-31 Dupla was designed by Ernõ Rubik, who had been retired for years at the time of the design work. His intention was to create a cheap, light, basic instruction glider, which could be the successor of the phaseing out R-26s Góbé gliders. The structure was designed for permissible load factors of +5,3/-2,7.
Originally it was a private venture of Rubik, who started to build the glider in his own garage. Later the MHSz (the National Civil Defence Association, responsible all technical sports in Hungary) supported him offering to finish the glider in its workshop located in Budaörs, and to execute the test flights. The glider got only a temporary certification to conduct the test flights. The glider first flew in 1983 and was tested between 1983 and 1986. 26 flights were executed with 8 hours total time.
The test flights finally were abandoned as vibration had occurred at all speed ranges. Her performances were well under that those of the R-26s Góbé. The procect was dropped as the R-31's performance as well as flight handling characteristics had not been suitable to prepare student pilots to fly such gliders as the SZD-30 Pirat. |
