In an attempt to fix the wingtip stall issue, four Pyrys (PY-1, -24, -32 and -37) were equipped with trapezoidal wings, as well as serving to test these structures for the VL Myrsky. While these new wings did reduce the risk of stalls, they made the aircraft even more unstable than before.
In an effort to address the wingtip stall issue, four Pyrys (PY-1, -24, -32 and -37) were fitted with trapezoidal wings, as well as used to test these structures against the VL Myrsky. While these new wings reduced the risk of stalls, they made the aircraft even more prone to instability than before.