Estes Mini Rocket Engines

Get your mini model rockets in the air with these popular rocket engines.

• Engines come with igniters, plugs, and instructions
• Compatible with: gnome, star hopper, and others

Model rocket engines use letters and numbers to describe their impulse, thrust, and ejection variables. The letter represents the total impulse, and each letter is double the one before it. 'A' engines deliver 2.5 N·s of impulse, while 'B' engines deliver 5.0 N·s, etc. The first number is the average thrust, and the second number is the time delay between powered flight and the ejection charge. A 'T' indicates a mini engine, with a diameter of 13 mm.

Thus, a 1/2A3-4T engine delivers a total impulse of 1.25 N·s, with an average thrust of 3 N. The total time of powered flight is less than 1 second. During the 4 second delay time, the rocket is a projectile traveling toward apogee. After the delay, the ejection charge engages the recovery system. In general, the higher the average thrust, the greater the acceleration of the rocket. Heavier rockets generally need more thrust.

Estes mini rocket engine packs come with igniters, plugs to hold the igniter in place, and instructions for new rocketeers. Bulk packs also include recovery wadding. Be sure to reference the Engine Chart and Impulse Graphs for detailed information about thrust, maximum lift weight, and duration.

Ordering information: Required but not included in the standard packs: recovery wadding.
Due to the nature of this item, it cannot be shipped by air under any circumstances. Please select ground shipping at time of checkout. Note: Rocket engines are subject to UPS hazardous shipping charges.

Delivery information: Sandard packs include: 4 mini rocket engines, 4 starters, and 4 starter plugs.
Bulk packs include: 24 mini model rocket engines, 30 starters, 24 starter plugs and ~72 squares of recovery wadding.