This 3D model was originally created with Sketchup 8 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 Thanks to Maberick Mocha for the 742, AirplaneNerd777 for the GE90’s, and 707 for the L1011 tail. During the late 1960s and early 1970s, Boeing studied the development of a shorter 747 with three engines, to compete with the smaller L-1011 TriStar and DC-10. The 747 trijet would have had more payload, range, and passenger capacity than the L-1011 and DC-10. The center engine would have been fitted in the tail with an S-duct intake similar to the L-1011's. However, engineering studies showed that a total redesign of the 747 wing would be necessary. Maintaining the same 747 handling characteristics would be important to minimize pilot retraining. Boeing decided instead to pursue a shortened four-engine 747, resulting in the 747SP. EDIT: edited tail engine, replaced PW’s with GE90’s, stole rakes from GEnx and put them on the tail exhaust. Now it actually has a chance of being fly-able.