The power 25 is designed to deliver clean and quiet power for 25-size glow engine for sport and scale airplanes weighing 3 to 5. 5 pounds (1. 4 to 2. 5 kilograms), 15-size 3d airplanes up to 3. 5 pounds (1. 6 kilograms), or models requiring up to 600 watts of power. It's an especially good match for 4- to 5-pound scale airplanes on the market and models such as the sig kadet lt-25, sig frazer, lanier extra 3. 25, global tequila sunrise 25 and great planes taylorcraft 20.