D12-5 Model Rocket Engines (2pk) and the upper or second

and the upper or second stage has a standard engine inserted into it for extreme flight altitude

when launching E Engines - sold separately

The balancing shaft is manufactured out of hardened material and then is centerless ground giving precision balance every time

Intermediate Skill

It heats up quickly to the selected temperature within a wide 392-896°F range

D12-5 Model Rocket Engines (2pk) and the upper or secondThe Estes D12 5 is a single stage engine designed for model rocket flight. It is a standard engine designed for flights in rockets weighing less than 10 ounces, including the engine. Each package includes 2 engines, 2 starters, and 4 starter plugs.