I've been working on the design of this one, and think I have a workable design.

It uses a 4" nominal body, with custom turned nose cone and bottom transition. Legs are 1/4" plywood.

It's a semi-scale model. The feet have holes to allow the air to channel thru... think square tube fins.

The swing test should be revealing, base drag and nose weight are key.

This is another rear eject spool design.

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__________________
John Simmons a.k.a. "Lakeroadster"
NAR 113985
My Fleet with Build Data: Lakeroadster's Rocket Shop

Let me know if you need a co Conspirator on the project , to 3D print up some useful parts

No witchcraft please....

__________________
John Simmons a.k.a. "Lakeroadster"
NAR 113985
My Fleet with Build Data: Lakeroadster's Rocket Shop

NO WITCHCRAFT ! Just some voodoo

If you can 3D print, I have the bits to replicate the Estes 1301 R2D2 Robot Hero rocket on Printables. Also has nosecones for R4, R5 and R6 droids.

4 inch upsscale versions are in the works.

https://www.printables.com/model/42...ocket-r4-r5-and

Wood and Cardboard.... no witchcraft involved. Old world handcrafted skills.

Got the solid model and drawings completed.

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__________________
John Simmons a.k.a. "Lakeroadster"
NAR 113985
My Fleet with Build Data: Lakeroadster's Rocket Shop

Instead of a Conspirator, how 'bout a COLLABORATOR instead ??

__________________
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, TURMOIL, FIASCOS, and HAVOC !

I used a piece of the trunk from a Pinyon Pine we cut down on our property back in 2016. It cleaned up to about 4-1/2" dia. and worked well for the 4-1/8" nominal diameter nose cone.​
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Smells really nice too. Just right for a dapper R2 unit.​
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Weighs in at a hefty 13.9 ounces. That's a full 3 ounces heavier than pine.​

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__________________
John Simmons a.k.a. "Lakeroadster"
NAR 113985
My Fleet with Build Data: Lakeroadster's Rocket Shop

You better plan on at least a high-thrust E motor to fly that thing.
An F50 would be better.

__________________
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, TURMOIL, FIASCOS, and HAVOC !

That's a good choice... thanks.

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__________________
John Simmons a.k.a. "Lakeroadster"
NAR 113985
My Fleet with Build Data: Lakeroadster's Rocket Shop