Complex sentence: As part of initial V-tail development Polish engineer Jerzy Rudlicki designed the first ruddervators ever flown in 1930, tested on a modified Hanriot H-28 trainer in 1931.
Split into simpler sentences: As part of initial V-tail development Polish engineer Jerzy Rudlicki designed ruddervators in 1930. They were first tested on a modified Hanriot H-28 trainer in 1931.