Redundant power-supply options

When you build a realistic giant-scale model after a specific full-size aircraft, you have many options to consider. You must not only select certain equipment to promote redundant and safe practices but also decide on the level of physical detail you wish to achieve. For example, do you want to simply construct and fly a semiscale airplane that resembles the full-size subject yet has exposed switches? Or do you hope to conceal these items for...