Overview The Estes E12-4 engine is 24mm diameter an upper stage engine designed for model rocket flight. This engine can also be used as a single stage engine. Maximum lift weight is 17 ounces. Each package includes 3 engines, 4 starters and 4 starter plugs. ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions or Click Here for State Specific Restrictions. Compatible Rockets Destination Mars™ Mars Longship™ Saturn 1B Pro Series II™ Majestic™ Mean Machine™ Technical Specifications Total Impulse 30.00 N-sec Time Delay 4 Seconds Max Lift Weight 17.0 oz (482 g) Max Thrust 30.60 Newtons (6.9 lbs) Thrust Duration 2.70 Seconds Length 3.8 in. (9.7 cm) Diameter 24 mm Weight 2.16 oz. (61.2 g) Propellant Weight 1.3 oz (36.9 g)
