Dassault MD.750

The Dassault MD.750 (Mirage 6000 or Mega Mirage or Spectre) was a single-seat twinjet tailless delta interceptor aircraft concept developed by Dassault Aviation beginning in 1958 and being periodically reworked through the 1960s.

Design
Among the design goals were a maximum speed of Mach 3.5, with a high rate of climb of about 5 or 6 minutes to an altitude of 16000 m.

The delta wing is mounted low and extends most of the length of the fuselage aft of the intakes, as with other Mirage fighters, and it has a single vertical tail but uses square section intake ramps with a linear shock plate rather than shock cones, as used on the North American A-5 Vigilante and Mikoyan-Gurevich MiG-25 unlike other Mirage fighters, with a similarly boxy fuselage intake section to those types. The existence of the project under the name Spectre was confirmed by Dassault Aviation's Vice-president in a tweet containing several artist's renditions.