The Estes D12-5 engine is single stage rocket engine. This engine is a standard engine designed for flights in rockets weighing less than 280g including the engine. Each package includes 2 engines, 2 igniters and 4 igniter plugs.
How does a model rocket engine work?
When the engine is ignited, it produces thrust and boosts the rocket into the sky:
After the propellant is used up, a delay is activated, producing tracking smoke and allowing the rocket to coast:
After the delay is burnt, the ejection charge activates, deploying the recovers system: