sentences:  A tri-motor did not have to be so grossly overpowered, to be able to fly with one engine out.On May 1, 1926 newly formed German airline Deutsche Luft Hansa started flying passengers on the route Berlin – Königsberg at night using G24 aircraft ('Wagner' page 232 'Seifert' page 376).This was the first time any airline, anywhere in the world, flew passengers at night.