At the Ivy Tech College for Kids model rocketry camp, Claire launches her Estes Hi Flier on an A8-3 motor - and achieves the highest altitude in the class! A blog on model rocket building and flying for beginners, written from a beginner's perspective. Learn what I've learned, and learn from my mistakes. Modified Estes Hi-Flier on an Aerotech D21-10. Simulations say it pulled around 80 gees. Broke 2 fins and crash landed 30 yards away. Popular content related to Model rocket & Estes Industries.