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Old 02-06-2017, 01:15 AM
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BEC BEC is offline
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Join Date: Feb 2009
Location: Auburn, Washington
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Not an original but two examples built from Semroc laser cut parts - one from their re-released kit and an older one just following the original instructions. On both that dimension is 2 13/16 inches or just a hair more.

I expect Carl used the best data he could find to make the laser cut file for the Semroc parts.

That should at least get you in the ballpark.


(The larger, laser cut gas passages in the Semroc kit are a vast improvement considering the strength of some Estes ejection charges. My first one's aft end was blown apart by an ejection charge and I didn't know it until picking it up because the 'chute deployed just fine anyway....).
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