010019 Estes B4-4 Engines - 18mm Custom Rockets Celebrate the Apollo era with

Celebrate the Apollo era with the Estes Saturn V (1:200 scale) Ready to Fly Rocket

the Mini Bertha can reach a max altitude of 650 feet on the recommended A10-3T engine

2cm) Diameter 1

this miniature reincarnation of an Estes favorite offers an exciting introduction to the world of model rocketry

Estimated Assembly Time 1 Hour (painting and glue drying time not included)  Download Instructions

010019 Estes B4-4 Engines - 18mm Custom Rockets Celebrate the Apollo era with010019 Estes B4 4 Engines 18mm The Estes B4 4 is a reliable, single stage 18 mm engine designed for model rockets weighing under 3. 5 ounces. With a balanced 4 second delay, it's a perfect fit for smooth, stable flights and consistent recovery deployment. Each 3 pack includes three engines, four starters, and four starter plugseverything you need for several successful launches. Ideal for hobbyists and STEM projects alike, the B4 4 delivers steady