Ground-level and on-board videos of my 4" Madcow Frenzy rocket, "Uncle Sam". Maiden flight on a CTI Pro54 J360 Skidmark motor on 4/19/14 with the Quad Cities Rocket Society (QCRS) near Princeton, IL. Peak altitude: 4,008 ft. Top speed: 641 mph Note: For the best video playback quality, click the little gear icon, then choose the highest HD option that's available. (You can do this with all YouTube videos.)