In Stock

1/2A3-4T Engines



4 – 1/2A3-4T 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.

In stock

The Estes 1/2A3-4T 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.



1.8 in. (4.6 cm)


13 mm

Estimated Weight

.23 oz. (6.5 g)

Total Impulse

1.25 N-sec

Time Delay

4 Seconds

Estimated Max Lift Weight

1.0 oz (28 g)

Max Thrust

8.30 Newtons (1.9 lbs)

Thrust Duration

0.30 Seconds

Initial Weight

0.23 oz (6.6 g)

Propellant Weight

0.07 oz (1.9 g)

Quantity Per Pack


2 reviews for 1/2A3-4T Engines

There are no reviews yet.

Be the first to review “1/2A3-4T Engines”

Your email address will not be published. Required fields are marked *