Estes F15-4 Rocket Engine Bulk Pack
Estes F15-4 Model Rocket Engines
F15 Model Rocket Engine Thrust Curve Chart
Model Rocket Thrust Curve Example

F15-4 Engine Bulk Pack

SKU: 001787
$99.00
Sale Sold out

Get eight reliable 29 mm F15-4 engines plus starters and starter plugs in one money-saving bulk pack. Built for heavier hobby rockets, the F15-4 delivers powerful, predictable performance and quick, repeatable launches for solo flyers and launch groups alike.

Perfect for weekend club launches or keeping spares on hand, these engines offer consistent ignition, a balanced thrust profile, and a 4 second delay that pairs well with a wide range of recovery systems. Note - recovery wadding is not included.

Includes :
- 8 F15-4 Engines
- 10 Starters
- 8 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.

No HAZMAT Shipping Fee!

Overview

The Estes F15-4 Engine Bulk Pack gives hobby rocketeers reliable, high-performance power at a great value. This bulk pack contains everything you need to fuel eight launches - 8 F15-4 engines, 10 starters, and 8 starter plugs - making it ideal for group launches, club events, or anyone who likes to keep spare engines on hand for fast turnaround. These full-size 29 mm engines bring mid-power performance for larger model rockets while keeping handling and storage simple.

Built for rocketeers who want dependable altitude and clean, repeatable performance, the F15-4 balances strong thrust with a predictable burn profile. The engine delivers a robust 49.61 N-sec of total impulse and a 4 second delay for comfortable recovery timing, so it launches heavier hobby rockets cleanly without sacrificing control. Whether you fly for fun, display, or competition, the F15-4’s consistent ignition and stable thrust make it a favorite when you need confidence on the pad.

Key flight specs you’ll want to know - total impulse 49.61 N-sec, time delay 4 seconds, max lift weight 21.0 oz (595 g), max thrust 25.26 N, thrust duration ~3.45 seconds. Each engine measures 4.5 in (11.4 cm) long, 29 mm 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 add wadding and a properly sized parachute or streamer for safe recovery. These engines are designed for rockets that accept 29 mm motors and for flyers who follow established safety practices.

Stock up, save, and spend more time launching - the F15-4 Engine Bulk Pack is ready when you are. Add this pack to your next cart to streamline prep for club launches, backyard sessions, or classroom demo days. Always follow the NAR model rocketry safety code, use appropriate recovery wadding and a certified launch controller, and launch only in approved open areas.

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.

Estes F15-4 Model Rocket Engines

Launch Learning Further with
Estes Education

Teachers, STEM clubs, Boy or Girl Scout leaders, and summer camp programs can apply for an Estes Education account at edu.estesrockets.com to receive a 20% Educator Discount and applicable tax exemptions, and access to 40+ FREE standards-aligned lesson and unit plans.

Bring the excitement of rocketry to your classroom, troop, or camp for less!

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Compatible Rockets

Technical Specifications

Technical Specifications

  • Total Impulse

49.61 N-sec
  • Time Delay

4 Seconds
  • Max Lift Weight

21.0 oz (595 g)
  • Max Thrust

25.26 Newtons (5.7 lbs)
  • Thrust Duration

3.45 Seconds
  • Length

4.5 in (11.4 cm)
  • Diameter

29 mm
  • Weight

3.59 oz (101.8 g)
  • Propellant Weight

2.12 oz (60.0 g)
F15 Rocket Engine Thrust Curve Chart

Customer Reviews

Based on 3 reviews
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gMB Research (Mission Viejo, CA)

Love it! I'm already half-way through the first box. Just one suggestion: Pair it with a box of F15-0's and call it a VogelPak.

M
Mark Zeilinger (Tehachapi, CA)
Back in stock

So happy that you got these back in stock. I have several rockets built around the need for that motor. Hope it can stay in stock for a long time. Thank you, Estes!

S
S.z.

Good service an excellent product.