Check the listing for details. Estes 1946 Boosted Bertha Flying Model Rocket Kit Level 3 : Advanced EST1946. Condition: New. Listed at 35.95 USD. Estes is proud to welcome the newest member of the Bertha family, the Boosted Bertha. This beaut rounds out the collection by being the first in the series to feature a two-stage rocket booster.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! Needed 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. Needed 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). Additional InformationRecommended EnginesRocket Only : B4-2, B4-4, B6-2, B6-4, B6-6, C6-5, C6-7Two Stages:Rocket : A8-3, A8-5, B4-4, B6-2, B6-4, B6-6, C6-5, C6-7Booster : A8-0, B6-0, C6-0Projected Max Altitude1000 ft. (305 m)Recovery System18 in. (45.7 cm) Parachute; TumbleLength28.2 in. (71.6 cm)Diameter1.64 in. (42 mm)Estimated Weight4 oz. (113.4 g)Estimated Assembly Time4 Hours (painting and glue drying time not included)Fin MaterialsLaser cut woodDecal TypeWaterslideLaunch SystemPorta Pad II and Electron Beam Launch ControllerLaunch Rod Size1/8"Age RecommendationEstes model rocketry is recommended for boys and girls ages 10+ with adult supervision for those under 12, and rocketeers of all ages.