I'm making some experiments to create a re-usable simulation of a Delco Carousel (IV, if you're counting). Intention would be a 3D model, and a pop-out 2D window for ease of use (copying Stuart's method for the FG1000). This is motivated by Alant's work on creating a VC-10, since no 1960s airliner should be without a Carousel or three....
I've checked existing aircraft and the Concorde has a similar INS simulation, but the obvious candidate aircraft such as the 707 and 727 don't; Tristar and DC-10 would be the other ones I can guess. (Maybe the Trident as well?) If anyone knows of any existing prior work, please do share it here.
Unlike the Concorde solution, I'm hoping to build this on top of the route-manager / GPS code, so that you can load in waypoints from the GUI (of course with manual entry also available for the purists). That's going to mean a slight modification to the Carousel to allow more than ten waypoints; I'm still deciding how to handle that visually. Again with a purist mode with the exact original appearance, but of course then you're limited to maximum of ten waypoints in your flight-plan.
Probably this takes some time, I'll aim to get the simulation side (commands, property API) defined and then worry about the visuals after. Don't hold your breath