Estes Rocket Engine: B4-4

ENGINES FOR MODEL ROCKETS

3 – B4-4 Engines
4 – Starters
4 – Plugs

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, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.