A3-4T Engines

(5 customer reviews)

A3-4T Engines

(5 customer reviews)


4 – A3-4T Engines
4 – Starters
4 – Starter Plugs

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Availability: In stock


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The Estes A3-4T 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.

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1.8 in. (4.6 cm)


13 mm

Estimated Weight

.28 oz. (7.9 g)

Total Impulse

2.50 N-sec

Time Delay

4 Seconds

Estimated Max Lift Weight

2.0 oz (57 g)

Max Thrust

6.80 Newtons (1.5 lbs)

Thrust Duration

0.60 Seconds

Initial Weight

0.28 oz (8.0 g)

Propellant Weight

0.12 oz (3.3 g)

Quantity Per Pack


5 reviews for A3-4T Engines

  1. Rocket Guru

    Have been using these ‘Mini’ A3-4T model rocket motors since the 1980’s and they do not disappoint. Wish Estes would bring back the ‘Mini’ A3-6T for my older Estes Beta Mini 2 stager.

  2. Louie

    Best bang for your buck…

    Don’t let these little motors fool you….They pack a heck of a punch for it’s size….My go to engine for my mini engine powered birds….try one….i am sure you will agree.

  3. nute

    Favoprite mini engine

    This is my absolute favorite mini engine!! it works beautifully for a single stage in the astron eliptic and is good for the first few launches of the Mini Honest John. This engine gives a long burn time for its small size. I use this motor at the beginning of my launches to get a feel for the wind patterns and rockets.

  4. Caley


    Work really well in the bandito!!!

  5. David

    Excellent Flight Profile

    I like this engine a lot in my models that don’t need the kick of the A10 to get off the pad. The relatively long burn with lower thrust makes it easier to track your bird.

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