Souped Up - K455 Sub-Minimum Diameter to Mach 2 and 18,452ft 

Souped Up is a 2" high power rocket that I designed, constructed, and flew to 18,452ft. It weighed in at 6.9lbs fully loaded and was constructed in a "Submin" configuration. This means that the rocket motor itself was a structural component of the rocket's airframe instead of a separate body tube.
It was propelled by an Aerotech K455 rocket motor containing 3.2lbs of propellant to a GPS confirmed altitude of 18,452 feet above the launch site at an estimated max speed of Mach 2.
I want to give special thanks to Thomas Booska, Julian Rice, Walter Lohmuller, Amrit, Adrian, and Alex Patrus for their invaluable assistance during the build process, and Thomas Booska, Julian Rice, and Braden Carlson for all of the launch media including photos and videos.