Rank 100 closes the Aircraft Cutaways catalog with the Dassault Mirage 4000 — a twin-engine heavy fighter prototype that scaled Mirage delta philosophy to F-15-class dimensions. First flown 9 March 1979 from Istres, the sole flying example paired two SNECMA M53 turbofans with a larger wing area, revised intake geometry, and avionics intended for export competition against the McDonnell Douglas F-15 Eagle and Grumman F-14 Tomcat. Dassault positioned the 4000 as a cost-conscious heavy interceptor for nations wanting twin-engine reliability without American export restrictions. Only one airframe completed flight test — roughly 400 hours aloft — before France selected the lighter Mirage 2000 for domestic production and export marketing. Technology demonstrator work informed later Dassault programs including Rafale subsystem development, but the 4000 never entered series manufacture. The prototype survives as a museum specimen and engineering reference for what-if twin-delta heavyweight design. Wallimilist renders the top-down split view with blue-grey French camo exterior, bone wireframe twin-engine cutaway, DASSAULT 4000 decal stack, HEAVY MIRAGE PROTOTYPE kicker, and Armée de l'Air shield exactly as the master PNG dictates — 1979 Cold War palette, twin-delta geometry, and curator copy on sole-prototype heritage and Eagle-class ambition.