Boosted Bertha™

(6 customer reviews)

Boosted Bertha™

(6 customer reviews)

A sport rocket at its core, this multistage flying model rocket can reach altitudes of 1000 feet! A colorful 18 inch parachute provides a soft landing, so the Boosted Bertha can be quickly prepared for another launch.


Availability: In stock

For This Rocket

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What you need to launch

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A sport rocket at its core, the second booster of this multistage flying model rocket will push this Bertha skyward, reaching twice the height of Big Bertha. The Boosted Bertha will reach altitudes of 1000 feet when powered with an Estes C6-0 engine in the booster stage and an Estes C6-5 engine in the main rocket. After the first stage ignites, the booster jettisons and gently tumbles back to earth. Once the rocket reaches apogee, the rocket will deploy the recovery system—a colorful 18 inch parachute. This provides the Boosted Bertha a light landing so that it can be quickly prepared for another launch.

Quality Estes body tubes, laser cut wood fins, a molded plastic nose cone, and easy-to-apply waterslide decals make for a full day of building enjoyment. Once painted to perfection, this Bertha is a must-have for any rocket collector!

WHAT YOU NEED TO BUILD: Scissors, pencil, ruler, fine sandpaper, carpenter’s glue, plastic cement, hobby knife, masking tape, clear tape, primer (white), paint (orange, white), and clear Coat (optional). Tools, construction and finishing supplies not included.

WHAT YOU NEED TO LAUNCH (sold separately): Estes Porta-Pad II Launch Pad and Electron Beam Launch Controller, Estes model rocket engines, starters and recovery wadding. Four 1.5V high quality AA alkaline batteries are also required for launch controller (not included).



Projected Max Altitude

1000 ft. (305 m)

Recovery System

18 in. (45.7 cm) Parachute; Tumble


28.2 in. (71.6 cm)


1.64 in. (42 mm)

Estimated Weight

4 oz. (113.4 g)

Estimated Assembly Time

4 Hours (painting and glue drying time not included)

Fin Materials

Laser cut wood

Decal Type


Launch System

Porta Pad II and Electron Beam Launch Controller

Launch Rod Size


Age Recommendation

Estes model rocketry is recommended for boys and girls ages 10+ with adult supervision for those under 12, and rocketeers of all ages.

6 reviews for Boosted Bertha™

  1. RaySitz (verified owner)

    Forgot to mention.
    If you use the 24mm engines in the Boosted Bertha – You should upsize to a 3/16″ launch lug and rod.

  2. RaySitz (verified owner)

    I got my Boosted Bertha kit from last year’s Black Friday sale. Then read the reviews and was disappointed with the weight to thrust ratio problem reading these reviews. So, waited and ordered the Estes 24mm engine mounts kit. Replace both original 18mm mounts. The length of the rocket tube and the booster tube both allowed me the put in “E” length engine mounts.

    Definitely solved the slow lift-off speed !!! Flies great on the D12 engines using the D>to>E adaptors included in the 24mm engine kit. Did try it out with E12 engines. Rocket went out of sight. Was lucky someone found in and turned it in. Probably won’t fly it on dual E12s again. It’s no fun when you can’t see the chute ejection.

  3. Matt Halpin

    As the first review shows, low launch speed with added paint weight makes for a bad mix. Mine came off the rod, gained about 40ft, and turned almost 90 degrees. Went another 50ft, jettisoned the first staged and sailed blissfully into the woods…never to be seen again. Disappointed to put that much work into making a good build for it to be lost on the maiden flight. This was in about 2mph of wind too.

  4. William Pantos

    Not sure if they will publish this but 50 years ago or so what I did was couple together a C6 and D12 engine in the original Big Bertha. The C6 fit perfectly in the D12 and it launched rather slowly because of the weight. It got to a couple hundred feet and pitched over for second or two and then the D12 ignited. It was horizontal by then and let out a solid smoke trail. Took off like a military device and was the last of probably 50 flights. The Big Bertha was the most durable of all Estes rockets and went out they way it should of. Never saw it again.

  5. Rocket Drew (verified owner)

    Its a fun build, but not a great flyer. This rocket is right at the edge of the C6-0 max lift off weight. This means if you add anything to the kit or get heavy with glue and paint it might make for some unstable low speeds off the rod. There’s also alot of fin area that can lead some odd flights even with low winds. Also keep in mind prepping 8 balsa fins can get a bit repetitive.

  6. Rocket Guru

    Thank you Estes, for this next addition, by the looks of Boosted Bertha and my past flights with the Bertha family, Mini to Super. Once purchased, I will be modifying mine, starting with the trailing edge of the 2nd stage fins, to match the leading edge, of the 1st stage booster fins, then staggering the fins will not be necessary, as shown, improving the aerodynamics and altitude. It should also be a great up powered rocket to 24mm, but only C11-0, or D12-0 motors, for the 18mm and some 24mm motors are the same length, on the 1st stage and D, or E motors in the 2nd stage. Just swap out the motor mounts, use epoxy, cut through the tubes fin slots, redraw the fins with extensions, use 3/16inch launch lugs and add nose weight for a stable C/G. At around 2,000feet you might use a GPS tracker, to retrieve Bertha, if boosted… hint, hint bright flashy colors.

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