Skip to content


Skip to product information
1 of 3

Estes Rockets

F15-4 Engines (29 mm)

F15-4 Engines (29 mm)

Regular price $29.99
Regular price $29.99 Sale price $29.99
Sale Sold Out

Each package includes 2 engines, 2 starters and 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.

ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions.


4.5 in. (11.4 cm)


29 mm

Estimated Weight

3.59 oz. (101.8 g)

Total Impulse

49.61 N-sec

Time Delay

4 Seconds

Estimated Max Lift Weight

21.0 oz (595 g)

Max Thrust

25.26 Newtons (5.7 lbs)

Thrust Duration

3.45 Seconds

Initial Weight

3.59 oz (101.5 g)

Propellant Weight

2.12 oz (60.0 g)

Quantity Per Pack


View full details

Live, Online Training and 1:1 Support!

Estes Education has been a leader in STEM education for over 60 years. We know that STEM is a vital interdisciplinary topic that requires hands-on and inclusive learning. Explore these supporting materials to take learning to new heights!

Should you have need, you can meet with a member of Education team for FREE, 1:1 online support to learn rocketry basics, how to apply our curriculum, and discover unique teaching strategies. Our team is eager to answer your questions!

Get Support Now!

Learn About Model Rocket Safety!

Not sure how to safely launch a rocket with your group? Head over to our dedicated Safety instructions page for videos, support, and more!

How to Fly Safely!