One of a number of tandem wing concept designs the the late 1930s by French designer Maurice Delanne. The DL 150 was to have been a medium bomber with a crew of 4 or 5 (in early drafts).
Very little information is available on this aircraft and I had to scale it from the size of its 1580hp engines which I have assumed to be Gnome-Rhône 14R radials with a diameter of approximately 1.3m.