The Estes D12-3 is a 24 mm single-stage model rocket engine designed for heavier rockets weighing up to 14.0 ounces or 396 grams. Its strong thrust and three-second delay make it well suited for larger or higher-drag models that need quick acceleration followed by relatively early recovery system deployment.
Each package includes two D12-3 engines, two starters, and four starter plugs, providing the essential ignition components needed for multiple launches with compatible model rocket equipment.
The D12-3 delivers a total impulse of 20.00 N-sec with a maximum thrust of 32.90 Newtons or 7.4 pounds. Its thrust duration is approximately 1.60 seconds, followed by a three-second delay before ejection. This combination provides a powerful boost and predictable recovery timing for compatible rockets.
Each engine measures approximately 2.75 inches or 7 centimeters long and has a 24 mm diameter. The engine weighs approximately 1.57 ounces or 44.5 grams and contains approximately 0.85 ounces or 24.2 grams of propellant.
The D12-3 is a practical choice for compatible larger model rockets, payload flights, broad-fin designs, and other applications that benefit from strong thrust and a shorter delay before recovery deployment. Always verify the rocket manufacturer's recommended engine configuration before use.
Purchasers and users of Estes model rocket engines are responsible for following all applicable local, state, and federal laws, regulations, and safety standards. Model rocket engines must be handled and used only as intended and in accordance with established model rocketry safety practices. Estes Industries, LLC disclaims liability for personal injury, property damage, or other loss resulting from misuse, improper handling, or unauthorized use of its model rocket engines.
