Although based on the same airframe as its piston engined counterparts, the DFI-115J featured a large quantity of differences from other 115s - most notibly its further set back wings, strengthened airframe, tricycle landing gear layout and internal wire controls. the DFI-115J never fully seen combat due to its deployment only 2 months from the end of the Second Global War - however, it was proven to be a formidible threat to fighter and bomber aircraft alike with its three centermounted cannons, high speed, and overall respectable responsiveness. The Aircraft was not without its faults however, as the aircraft had two large low armored engines, it became a relitively easy target for enemy fighters to hit and disable, taking off with the DFI - 115J posed another issue as well as a pulling up as early as possible would often cause the plane to slam back onto its tail and in some reported cases with short range fuel missions - cause the aircraft to gain altitude rapidly before going into an irreversable stall, one such event happened during a quick response to an enemy bombing raid and caused the runway to be unusable - therefore leaving the base almost completely defenseless:

This event may have been a critical turning point in the ultimate defeat of Dieswen during the Second Global War as the air base that the incident happened at was only 50 miles away from Oasewick - the Capital of Dieswen.

Link to other DFI-115 variants:
https://www.simpleplanes.com/a/06oN07/DFI-115-Thaddaus-Bohnischs-fighter