B6-4 Engines

B6-4 Engines


3 – B6-4 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


Recommended Rockets

You may also like…

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.

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.




2.8 in. (7 cm)


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 B6-4 Engines

  1. Tim (verified owner)

    Overall great engine

    I used this engine all the time and it works great and flys high too.

  2. Cameron

    Perfect engines for a standard rocket

    These were perfect for all my rockets great launches no failures and worked every time. Good buy for these engines

  3. dave

    strong and reliable

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

  4. MJA RocketWorks


    You need this in your fleet. Most standard engine rockets use B engines. B6-4s aren’t too low or too high power engines with a good delay time. It’s perfect for rockets of all shapes and sizes.

  5. nute

    the best overall engine

    This is my overall favorite engine. It takes just about any stadard engine rocket and kicks it off the pad. This thing will propell rockets to adaquate heights that are still easily visible. This engine produces the perfect flight for the EPM 010, my favorite engine!!!

Add a review

Your email address will not be published.