This is a heavily modified P51 Mustang. In addition to the cabin-back design, swept wings, and top-tail horizontal stabilizers, this plane holds a special feature that gives the "R" to its name: a two-stage experimental rocket-propulsion system. Stage one (AG1) is the low-power stage, firing four rockets when powered. Stage two (AG2) fires six more rockets. The combo of these two sets is a high-speed, fuel-friendly flying experience. To discard the rockets after use, slowly and smoothly pull into a vertical climb and wiggle the pitch control a bit until they slide out. Try not to make very sharp turns or rolls when rockets are running, as the they are volatile and will probably explode if you make sharp maneuvers. If you want to put all the rockets on one AG button, or split them into pairs, just edit the activation groups on the pylons. Have fun with this concept I've been perfecting!