Power up your mid-size model rockets with the Estes F15-6 Engines. Designed for impressive liftoffs, these 29 mm engines deliver extended thrust for thrilling, high-performance flights. With a 6-second delay, they’re perfect for heavier rockets that require extra coast time before recovery deployment.

The F15-6 offers a total impulse of 49.61 N-sec and a long 3.45-second thrust duration, producing powerful, smooth launches. Whether you’re flying for fun or testing your skills with altitude challenges, this engine gives you the performance needed to push your rockets further into the sky.

Includes:

2 × F15-6 Engines

2 × Starters

4 × Starter Plugs

ATTENTION: These engines cannot be sent to post office boxes. Please be sure to provide a PHYSICAL ADDRESS when purchasing E and F sized engines.

E and F sized engines cannot be shipped to Alaska, Hawaii, Puerto Rico or Guam.