The 400A has undergone vast design improvements from the original 400. It is mainly constructed of aerospace light alloys and features a new fuel tank placed under the floor, which allows more cabin space! The fuselage measures 15.6 feet long, 4.8 feet high and 4.9 wide with 7 or 8 passengers seated comfortably in newly designed seats that swivel 180 degrees to create an enjoyable environment for you to relax on your way home after work without any distractions – making it quieter than ever before thanks to sound-dampening materials added by engineers too!