The Estes 1/4A3-3T engine is single stage engine designed for model rocket flight. This engine is a mini engine designed for flights in lightweight rockets. Each package includes 4 engines, 4 starters and 4 starter plugs.
Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a launch system, model rocket engines, starters and recovery wadding are required - sold separately-unless otherwise specified.