1/4A3-3T Engine
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1/4A3-3T Engine



4 – 1/4A3-3T Engines
4 – Starters
4 – Starter Plugs

PLEASE NOTE: This item will ship by US Postal Service only. You MUST HAVE a physical mailbox or post office box for delivery.


The Estes 1/4A3-3T engine is single stage engine designed for model rocket flight. This engine is a mini engine designed for flights in lightweight rockets. Each package includes 4 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

0.625 N-sec
  • Time Delay

3 Seconds
  • Max Lift Weight

1.0 oz (28 g)
  • Max Thrust

4.90 Newtons (1.1 lbs)
  • Thrust Duration

0.25 Seconds
  • Length

1.75 in. (4.4 cm)
  • Diameter

13 mm
  • Weight

.21 oz. (6 g)
  • Propellant Weight

0.05 oz (1.3 g)
  • Having Trouble?

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