Estes Big Bertha Damon era OpenRocket Design FileContributed by Wolfram v.Kiparski Comments: An Big Bertha variant (K-23 and #1948) from Estes Industries' Damon-era (1969-1989). Note the nice long motor mount tube. This variant had an engine hook, but no engine block was used. The early plastic nose cone part number was PNC-60L (two piece polystyrene cone). The later plastic nose cone had part number PNC-60MS, and even later, #71020. All of these cones were 2.5-inch long ellipsoids. Designer: Vern Estes
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