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Mini Bertha design file

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Rex R

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as I was cutting 'skins' for my latest project the thought occurred to me that I have not seen mention of the Estes Mini Bertha(oop '72 - '82). so I did a design file for it, for those who might want to build it.
Rex

View attachment oop_estes_minibertha.ork
 

Rex R

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note: erockets lists fins for the mini bertha(not sure how they compare to the ones in the file) but does not at the moment carry the kit. you will need a mini engine hook to complete the rocket.
Rex
 

TangoJuliet

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I can't open the .ork file (I don't have that program) to look, but is the Mini Bertha the same as the "Baby" Bertha that Estes currently sells?
 

Rex R

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the mini B was a bt20 downscale of the big bertha powered by a 13mm motor. if open rocket is to be believed, flights of over 600' on an A3-4T were possible.
Rex
 
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