The SZD-56 Diana is a 15 metre Class glider originally designed by Bogumił Bereś at PZL-Bielsko.

The spar-less wing[4] has plate airbrakes protruding from the upper surface only with full-span flaperons.

[6] Also, the leading and trailing edges do not follow any straight lines, necessitating a production process that depends heavily on CNC technology.

The new wing offers considerably better performance at high speeds and better immunity from surface contamination.

[7] In October 2016 Diana's IP rights for the design were passed to Polish company AVIONIC, who announces number of changes to increase performance and comfort of the flight, calling the aircraft NG (New Generation).