Mini Bertha design file

[Rex R]

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]

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]

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]

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

 

[TangoJuliet]

Thanks Rex.