Estes Rocket Engines: B4-4 (3 ea)

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The Estes B4-4 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 3.5 ounces, inclu ding the engine. Each package includes 3 engines, 4 starters and 4 plugs. ADDITIONAL INFORMATION Length 2.8 in. (7 cm) Diameter .7 in. (18 mm) Estimated Weight .68 oz. (19.3 g) Total Impulse 5.00 N-sec Time Delay 4 Seconds Estimated Max Lift Weight 3.5 oz (99 g) Max Thrust 13.20 Newtons (3.0 lbs) Thrust Duration 1.10 Seconds Initial Weight 0.68 oz (19.2 g) Propellant Weight 0.27 oz (7.6 g) Quantity Per Pack 3 Show more