The D12-5 Engine Bulk Pack is built for rocketeers who want reliable D-impulse performance in a convenient, launch-ready format. These motors are a great match for medium-weight kits and two-stage rockets that need a stronger lift-off and a predictable coast-to-recovery profile. Use them when you want added altitude and a confident, repeatable flight every time you head to the field. Beyond raw power, the D12-5 shines because of its consistency. Each motor produces a clean, steady burn that reduces variability between flights, so you’ll see similar altitudes and flight behavior across launches. That predictability makes the D12-5 particularly useful for learning how changes in payload, fin design, or recovery systems affect performance—valuable whether you’re teaching beginners, running a club launch, or flying with the family. Performance highlights include a total impulse of 20.00 N·s, a 5 second time delay, a maximum lift weight of about 10.0 oz (283 g), and a peak thrust of 32.90 N with a thrust duration around 1.60 seconds. These specs make the D12-5 powerful enough for rockets such as Green Eggs, Big Daddy, and Odyssey while remaining predictable and easy to manage at the launch site. The 24 mm diameter and compact form factor mean wide compatibility with many popular Estes kits and aftermarket mounts. Ready to step up your flights? The D12-5 Engine Bulk Pack gives you the power and consistency to learn, experiment, and enjoy more successful launches. As always, follow the included safety and handling instructions, use the recommended recovery gear, and launch in a safe, legal area. Order your pack today and get more of the high-altitude, reliable flights that keep people coming back to the pad. ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.
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