That plane must have had cooling issues or the engines where really bad even for WW1 standards.
She did fly though in 1919 as the war was not technically over. Meant to be a long range bomber though she was not stress flown but 30 hours where estimated.
7 hours would be regular combat load
do-335 cooling issues multiplied by 3 literally
or maybe closer to he-117, all the powerplants glued to each other.
It’s a works on paper kind of issue. Then again in race plane the idea of welding two engines together worked well enough but these planes are pavement princesses so war birds would have different outcomes.
Added:
on February 28 I mentioned the following plane
Friedriechshafen FF.54, a quadruplane. I stated I am not sure if it was ever armed. On the photo above we can see it was, making it eligible for the tech tree. :)
