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Model Rocket Building Blog 
Model Rocket Building Posts
Rocketry Product: Estes - Big Bertha {Kit} (1948, 23, 7007)
Old Big Bertha Instructions (2019-07-27)
A blog comment made mention of the Big Bertha nose cone. The shape and length have changed over the years. The old balsa BNC-60L nose cone had 3 1/8"exposed above the body tube edge. It was longer ... [Read More]
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