prompt: Compy, why does the Hondajet have those weird engine pods on top of the wings? Is it just to be different or is there a valid purpose?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Compy, why does the Hondajet have those weird engine pods on top of the wings? Is it just to be different or is there a valid purpose?
chosen.role: assistant
chosen.content: The Honda Aircraft Company advertises their unusual engine configuration as OTWEM or over-the-wing engine mounts. Though they use it for marketing purposes, the design stemmed from engineering needs.
  
  The HondaJet HA-420 is small and sits low to the ground compared to many jet aircraft. There isn’t enough space under the wing to mount a more conventional engine nacelle. 
  
  Most jet producers who face this problem mount the engines to the sides of the fuselage instead, but that comes with its own set of compromises. Vibrations and noise get conducted directly through the mountings and into the fuselage. Perhaps even more critically, considering the HondaJet’s small airframe, the mounting structure takes up a significant amount of fuselage space. Honda’s engineers decided they could free up interior space by mounting the engines to the wings instead, and settled on the over-the-wing arrangement. 
  
  The tall spars place the engines largely behind the wing so that they don’t interrupt the airflow and reduce lift.
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Compy, why does the Hondajet have those weird engine pods on top of the wings? Is it just to be different or is there a valid purpose?
rejected.role: assistant