[1] Unfortunately, the production methods left the epoxy laminates prone to shrinkage which drastically affected performance due to the sensitive aerodynamics of the aerofoil sections used.
[1] The SZD-41A Jantar Standard was built primarily of fibreglass–epoxy resin composite with local strengthening from welded steel tube in the fuselage centre-section, foam ribs in the wings and plywood at equipment mounting points.
The monowheel manually retractable landing gear hung from the steel tube centre section structure which also mounted the towing hook and wing attachments.
Large plate style airbrakes aft of the mainspar extend from the top and bottom surfaces, with the gaps sealed by spring-loaded covers when closed, also operating the disk brake on the monowheel at full extension.
After modifications to remove restrictions on the prototypes and improvements required after flight testing, production of the SZD-41A and SZD-41B Jantar Standard commenced, continuing until 1978 when 159 had been built, many of which were exported worldwide.