Rocket Engines. The Estes E9-6 engine is a single stage engine designed for flights in rockets weighing less than 12 ounces, including the engine. Each package includes 3 engines, 3 igniters and ...
upper stage engine designed for model rocket flight. This engine can also be used as a single stage engine. Maximum lift weight is 12 ounces. Each package includes 3 engines, 4 starters ...