Complex sentence: William Piper turned the 49 planes over to Thomas Beck and the airplanes were christened by 48 fashion models who popped toy air balloons that were fastened to the propeller of each "Flitfire".
Split into simpler sentences: William Piper turned the 49 planes over to Thomas Beck. The airplanes were christened by 48 fashion models who popped toy air balloons that were fastened to the propeller of each "Flitfire".