001606 – B6-4 Engines



3 – B6-4 Engines
4 – Starters
4 – Plugs

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The Estes B6-4 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 4 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.

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Additional information


2.8 in. (7 cm)


.7 in. (18 mm)

Estimated Weight

.63 oz. (17.9 g)

Total Impulse

5.00 N-sec

Time Delay

4 Seconds

Estimated Max Lift Weight

4.0 oz (113 g)

Max Thrust

12.10 Newtons (2.7 lbs)

Thrust Duration

0.80 Seconds

Initial Weight

0.63 oz (17.8 g)

Propellant Weight

0.23 oz (6.5 g)

Quantity Per Pack


15 reviews for 001606 – B6-4 Engines

  1. george

    Perfect Engine

    This Engine is a perfect step from the A series to more power an less than a C that may produce too much altitude for average fields. Have never had one let me down. My favorite engine.

  2. Boris Sheikman

    Perfect low flight engine for large rockets

    I used this engine in an Amazon rocket and it provided great excitement for the kids! It was powerful enough to launch the rocket up to a respectable height but no so high that it was out of sight. I imagine that this is the perfect engine for large rockets looking for low altitude launches.

  3. Sam

    Great to use

    These engines are great to use on any single stage rocket, and are great for beginners!

  4. David

    The Swiss Army Knife of the Estes engine lineup!

    I absolutely LOVE this engine. As your fleet grows, you will find this engine has the versatility to make it something you will always have on hand. For calm winds and light models you can install this in the place of the venerable A8-3. Like me, I bet your first reaction will be “wow!” the first time you use it.

    Got a heavier model or carrying a payload? This engine will get it off the pad. Its perfect for those times where you’ve used a B4-4 or B4-2 and wished you had more “kick”. Great substitute too for models that take a C6-5 or C6-7 but your launch field or wind conditions wont support it.

    Of all the “standard” engines that Estes carries, this is my favorite. For low power flights I love it.

  5. Ryan


    perfect amount of power for medium rockets

  6. frenchie


    this engine is great! i would recommend it to people who have the SkyTrax

  7. c.werdal


    this engine is my preferred engine. those people wishing to lose a rocket, the c6-5 is for you. this motor is the overall best

  8. Hank

    Very good

    it is good and goes high

  9. Matt

    good engines

    theese are good engines to purchase it is used in a lot of rockets and is a good all around engine fwoosh! (that was the sound this particular engine makes)

  10. James B

    Secondary Engines

    This engine should be used after first timers have gained experience with the A-8’s. This engine will propel your rocket faster and higher, approximately 200-300 feet depending on wind sheer.

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