E12-4 Engines
E12 Thrust Curve
E12-4 Engines

E12-4 Engines



3 – E12-4 Engines
4 – 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.


The Estes E12-4 engine is 24mm diameter an upper stage engine designed for model rocket flight. This engine can also be used as a single stage engine. Maximum lift weight is 17 ounces. Each package includes 3 engines, 4 starters and 4 starter plugs.

ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions or Click Here for State Specific Restrictions.


Technical Specifications

Technical Specifications

  • Total Impulse

30.00 N-sec
  • Time Delay

4 Seconds
  • Max Lift Weight

17.0 oz (482 g)
  • Max Thrust

30.60 Newtons (6.9 lbs)
  • Thrust Duration

2.70 Seconds
  • Length

3.8 in. (9.7 cm)
  • Diameter

24 mm
  • Weight

2.16 oz. (61.2 g)
  • Propellant Weight

1.3 oz (36.9 g)

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