Me 163D, Ju 248 and Me 263A are the same plane according to William Green but that source is rather dated.
The story I know is that the design of an improved 163 was started as the 163D by messerchmit then the project moved to Junkers team , and was renamed the Ju 248 and finally got back to Me and the protype was bulit as Me 263A.
From the site I linked above. "Known at one point as the Ju 248, the Me 263 was a Junkers development of the Me 163B and C rocket propelled interceptors. It had a much slimmer fuselage of semi-monocoque construction and built in three main sections. A pressurized cockpit with armor protection for the pilot was riveted to the main fuselage section, while the rear portion was detachable to facilitate easy inspection and maintenance of the HWK 109-509C rocket motor. As Me 163 development proceeded it became clear that the landing and stability problems could not be easily eradicated from the type in its existing form. Consequently, early in 1944 design work started on a radically improved version known initially as the Me 163D. At an early stage the work was handed over to Junkers, and the result, finally designated Me 263, was an interceptor which went some way towards eliminating the Me 163's landing and endurance problems. There was provision for more fuel and a retractable tricycle undercarriage, though the wings and fin were similar to those of the Me 163B." me263
Za is going to beat you to death with a dead octopus !!!!!!!! See page 7, post 162 and put out a better aircraft to pay for your sins.
Zat Airbus ist einen VFW 614 FLUG REVUE October 2001: VFW 614 - ahead of its time Here's another one: