Reviews : Estes 1/2 A6-2 Model Rocket Engines (3) Estes Rockets 1/2 A6-2 Model Rocket Engines (3) $11.29 Leave a Rating! ★ ★ ★ ★ ★ OR Write a Review! Write a Review Sort 5-Star: 2 (3 ratings) 4-Star: 0 (0 ratings) 3-Star: 0 (0 ratings) 2-Star: 0 (0 ratings) 1-Star: 0 (1 ratings) Reviews work great By: andrea.anderson use these engines for shooting off rockets at an annual student conference each year and they work great (6) Best for VERY small rockets on VERY small fields By: wallyum (Ft. Thomas, KY) Great motor for a small field, small bird day. The 1/2A6-2 is perfect for the Estes Sprite. (18)