High-power is as close as you can get to NASA-style rocketry without actually working for the space program. Rockets in this category use reloadable, metal-cased engines with composite propellants. They may also use hybrid rocket motors. Typical flight weights are well in excess of 3.3 pounds and can be well over 50 pounds!
Other features of a high-power rocket are plywood, fiberglass, or composite fins, cardboard or fiberglass body tube, a plastic, fiberglass, or balsa nose cone. Electronics for parachute deployment, tracking, and data recording is common in this class of rockets. Speeds in excess of mach 1 are also common with some flights reaching nearly 50,000 feet in altitude.