1/2A3-2T Engines

1/2A3-2T Engines


4 – 1/2A3-2T 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.


Availability: In stock


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The Estes 1/2A3-2T 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.

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1.75 in. (4.4 cm)


13 mm

Estimated Weight

.23 oz. (6.5 g)

Total Impulse

1.25 N-sec

Time Delay

2 Seconds

Estimated Max Lift Weight

2.0 oz (57 g)

Max Thrust

8.30 Newtons (1.9 lbs)

Thrust Duration

0.30 Seconds

Initial Weight

0.23 oz (6.4 g)

Propellant Weight

0.07 oz (1.9 g)

Quantity Per Pack


4 reviews for 1/2A3-2T Engines

  1. dave

    strong and reliable

    estes engines are easy to use work well and are reliable.

  2. Jason

    Fast Light Rocket Engines

    These are quick little rocket engines! Great for younger enthusiasts like Cub Scouts, RA’s, GA’s and small school demonstrations. Fast thrust get the rocket in the sky quickly, the quick burnout keeps the rocket in sight and these are cheap when bought in bulk amounts for multiple flights and several hours of excitement!

  3. nute

    good first shot engine

    This is one of my favorite engines to launch my Astron Eliptic on as a two stage. it goes up, this second stage ignites and it gives the experience of two stages w/o loosing a rocket. This is a good engine to test wind conditions or test a model on its first flight.

  4. Larry


    This is my all- around favorite mini rocket engine. The 2 second delay seems about perfect for most of my mini rockets.

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