F15-4 Engine Bulk Pack

The Estes F15-4 Engine Bulk Pack is built for educators who want to give their students a hands-on lesson in real rocket science. This 8-engine bulk pack is perfect for classrooms, camps, and STEM clubs ready to take their rocketry experience to the next level. With 8 engines, 10 starters, and 8 starter plugs included, you can power multiple rockets in one session and keep students engaged in every stage of the experiment. The F15-4’s 29 mm size brings higher performance to larger classroom rockets while maintaining the simplicity and safety Estes is known for.

With 49.61 N-sec of total impulse and a 4 second delay, these engines provide long, powerful burns that help rockets reach impressive altitudes with stable flight paths. This makes them an excellent choice for lessons on thrust, impulse, and flight dynamics. The F15-4’s consistent ignition and smooth acceleration allow for repeatable results, so students can analyze flight data and better understand how different factors influence rocket performance.

Each engine measures 4.5 in (11.4 cm) long, 29 mm in diameter, and weighs about 3.59 oz (101.8 g) with 2.12 oz (60.0 g) of propellant. Recovery wadding is not included, so be sure to have Estes wadding and recovery systems ready before launch. When paired with a reliable launch controller and a clear, open launch area, the F15-4 gives educators a dependable way to demonstrate real-world science safely and memorably.

From classroom lessons to outdoor field launches, the F15-4 Engine Bulk Pack delivers everything you need to inspire curiosity and confidence in future engineers and scientists. Build, launch, collect data, and watch students’ understanding of physics and flight soar with every countdown.

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.