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and the upper or second stage has a standard engine inserted into it for extreme flight altitude
It heats up quickly to the selected temperature within a wide 392-896°F range
QUICKBUILD MUSTANG
The balancing shaft is manufactured out of hardened material and then is centerless ground giving precision balance every time
when launching E Engines - sold separately
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.