COMPOSITE MOTORS
Composite motors are mainly designed for high power rockets but they could be used in model rockets if you strengthen the fins with epoxy. Composite motors are the same phisical size of black powder motors but composites deliver up to three times the power. All sizes made by Aerotech come in White Lightning, Black Jack, and Blue Thunder. Vulcan also makes single use motors in Smokey Sam and HF(I'm not sure what that stands for). Vulcan only makes H to L motors but their Smokey Sam looks really cool!