ESTES 1605 B6-2 Model Rocket Engines 3 Pack (Ships USPS Ground) Pinewood Derby User-activated whistle

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ESTES 1605 B6-2 Model Rocket Engines 3 Pack (Ships USPS Ground) Pinewood Derby User-activated whistleESTES 1605 B6 2 Model Rocket Engines 3 Pack Ships USPS Ground Only The Estes B6 2 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 4. 5 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs. SPECIFICATIONS: Length: 2. 8 in. (7 cm) Diameter: 18 mm Estimated Weight: . 61 oz. (17. 3 g) Total Impulse: 5. 00 N sec Time Delay: 2