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Old 07-27-2019, 10:51 AM
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LeeR LeeR is offline
Retired with Way Too Many Kits
 
Join Date: Jun 2007
Location: Colorado
Posts: 2,375
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If you follow the Boosted Bertha link posted above, there is a link to “Download Instructions”. Besides having moderately larger booster fins, it has a screw-on motor retainer (as does the upper stage). With that added mass toward the aft end, it looks like it would tumble or possibly come in fairly flat to me.

Two features I really like — booster venting thru centering rings, out the aft end, and TTW booster fins. Looks to be a fun rocket.
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Lee Reep

Projects: Super Sky Hook, Super X-Ray, Estes Phoenix, Big Daddy, QCC Explorer
Awaiting Paint: Estes Saturn 1B
Last Completed: Semroc Spaceman
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