North Coast Rocketry Kit. I built this in 1988. 43 inches, 2.60 diameter, 29mm . Can use 24mm adapter. This is #3 out of 4 that I built. #1 was flown once in 1987 ( no photo) on a 29 mm F20 Vulcan motor . The casing looked just like and Estes motor. A throaty roar and lost it .