sentences:  (This paragraph based on 'Wagner' pages 230–234)
  
  Junkers continued to build the G24/G23 as a tri-motor, because the ruse to circumvent the Allied restrictions also had the benefit that the plane could fly, and even climb, with one engine out.In 1925 most airliners were single-engined, since one big engine will usually be more efficient than several small ones.Twin-engine types could not maintain altitude with an engine out, unless they were so overpowered that the airlines could not afford to operate them.