Tripoli Rocketry O' San Diego Ocotillo Launch On 10-18-1998 These are nay Estes Model Rockets, They are seriously high powered rockets powered by Aerotech Consumer Aerospace Engines requirin' special permits, licenses, ya bilge rat, and FAA waivers. Well, blow me down! T' last one supposedly broke t' speed o' sound, shiver me timbers, you can barely hear t' "pop". Blimey! FYI... Ahoy! T' speed o' sound is about 768 miles per hour. T' speed needed t' escape Earths gravity and obtain orbit is about 7 miles per second, ya bilge rat, or 25000 miles per hour.