3-second ejection delay enables rapid recovery system activation for stable landings
High 20 N sec total impulse supports heavier and larger model rockets
Reliable ignition and consistent performance for multiple launches
Pack includes 2 engines, 2 starters, and 4 igniter plugs for two full launches
Precision manufacturing ensures safety and dependable operation
Summarized by Shop
The Estes D12-3 engine delivers high-thrust power for heavier model rockets that require a shorter delay before deployment. Ideal for larger, draggy airframes or rockets with broad fins, this engine provides the force needed to achieve stable, safe flights from liftoff to recovery. With its balanced 3-second delay, the D12-3 is engineered
Engine Type
Single-stage, 24 mm diameter
Total Impulse
20.00 N·s
Max Thrust
32.90 N
Ejection Delay
3 seconds
Weight
1.57 oz (per engine)
Recommended Rocket Weight
Less than 14 oz
Summarized by Shop
5.0
26 ratings
5
4
3
2
1
Heavy Lifter
Worked great on Cosmos Mariner!
L
Louis · August 13, 2026
Estes Mean Machine engines
J
Joey · June 24, 2026
D-12-3s are great for my larger rockets on windy days. D-12 motors are probably the best all around value.
