Estes Rockets - Big Bertha Model Rocket Kit, Skill Level 1 KYO34415T1C (first launch)

(first launch)

Vertical ball studs for finer roll center adjustment

9 Rock Ripper tires used on many of the SCA-1E models and provide a firm beadlock and uniform grip around the tire itself

This part replaces the Center differential for a locked differential and is recommended for off-road use only

Estes Rockets - Big Bertha Model Rocket Kit, Skill Level 1 KYO34415T1C (first launch)Big Bertha is an Estes original! She's an all around Estes favorite that has truly withstood the test of time. Over the decades, Big Bertha has been most modelers' first big build. If you've never flown a Bertha, get one and launch it. Once you've flown it, you'll take it to every launch! The Big Bertha gives you a slow, realistic liftoff. What a thrill it is to watch! Propelled by powerful standard Estes engines, this beauty travels to 500 feet and