F15-4 Engine Bulk Pack
F15-4 Engine Bulk Pack
F15-4 Engine Bulk Pack
F15-4 Engine Bulk Pack

F15-4 Engine Bulk Pack

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Bulk pack 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.

No HAZMAT Shipping Fee!


The Estes F15-4 engine is a single stage engine designed for model rocket flight. This engine is a 29mm diameter engine designed for rockets with a maximum lift weight of less than 21 ounces.  This engine is powerful enough for a wide range of launches, providing up to 49.61 Newton-seconds of total impulse. All components are designed for reliability and to ensure maximum safety during flight.

Engine bulk packs come with rocket engine supplies you need to launch 8 rockets. Included are 8 rocket engines, 10 model rocket starters, and 8 starter plugs. Please note that recovery wadding is not included. Use the F15-4 engine to launch some of the largest rockets of the Estes model rocket family!


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)

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