I’ve always wanted a conjoined cluster …

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp

Hey, Lee, too funny!

Thank you! Someone suggested I put 3x18mm cluster in each tube. I have not glued in the planned 18mm mounts, so I will consider it.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp

Then it would be an Astron Ranger and a clustered Betty.
The Astron Ranger 3x18 cluster came out WAY before the Big Bertha.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

I know, I built an Astron Ranger long before you were ever born.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp

But... I thought that Betty had three fins and Bertha had four fins, but they both have three fins, wouldn't that make it a Double Betty?

Goose

I thought Goose didn't survive smacking square into that F-14C canopy upon ejection.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

It is unclear if Bertha is missing a fin, or Betty has an extra. But, I am treading on thin ice for perhaps being insensitive, so I won’t say much more.

__________________
Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp

I'd make them each single 24mm.
Much simpler getting a two-motor cluster ignited than 6.
I cant imagine wanting to launch with less than 2xC11 power on a rocket this large.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

If Lee's talking 3x18 that suggests these are from regular Big Bertha/Big Betty kits so BT-60/40mm tubing.

The Ranger is in the 1963 catalog . Big Bertha first showed up in Model Rocket News as a plan in the spring of 1963, so I don't buy "The Astron Ranger 3x18 cluster came out WAY before the Big Bertha." Of course back then when we were little kids, time did seem to run more slowly....

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Bernard Cawley
NAR 89040 L1 - Life Member
SAM 0061
AMA 42160
KG7AIE