Jim, Please attach your design file... I'm here to learn, so I'd like to see what changes you made that achieved your results. Thanks! Goal? Other than to see if I was capable of designing a rocket that would stay together powered by the N5800... nothing really. ha! So far, it appears I'm failing!
Sorry but I did not save it, rather opted to leave your file alone when I finished. Well designing is one thing....the only way you will ever know is to take the risk, build it & fly it.
I did change your NC to power series 5.5 to 1 [27in] among other things.
It looked very close to this one, but in your daim. 5in. I cannot divulge who or what this one is, as it's being built as of now for a record attempt, so in all fairness to those involved, cannot post the file. That being said this is a snapshot of it & Carolina Composites is doing all the custom carbon. notice 4 fins instead of 3. It is for a German team.
As SinDL states this allows a shorter span. [what you want where possible]
I was sent a file that was several feet longer and squarish fins......after several hours this is what came out. Sent to flier where he finished the tweaking and final result along with C C before building began.
This was over a months time and many e-mails with the 2 other major players involved.
Yours was tweaked fin wise very close in shape. You'll find that a custom cone is needed for these usually 6-7 to 1 for optimum. [for what we do anyhow]
I am by no means "the" expert in all this. But I have built a few extreme rockets.Some have failed, some worked great. That is part of the process to be expected when pushing the envelope. Probably 50-50 for most if your honest about it. The trick is just doing the research & not trying to re-invent the wheel. It's all been done in the 50-60's by military and sounding rockets....Google is your friend. I have thousands of pages of research and hundreds of hours reading all this stuff.....which I recommend if you are serious. Getting the fins to stay on is the hardest part, next is beating Mach jump, so it stays together. [in my opinion anyway] The other major hurdle is designing ejection charges that work at these altitudes.
This link is to another successful design that now holds the record for N's at 65,000[? don't remember, might be in the final page] My Ozzie friend Nic built this after 3 yrs of testing & research. There are many killer projects in this Australian Forum. I highly recommend searching around there, more Americans than you think hang out. Look for the Raptor 22..airframe made of glass & cork!
https://www.ausrocketry.com/forum/viewtopic.php?f=10&t=4666
Do some research, start small, get the skills needed to build something that will hold together, and expect some failures along the way.
I have moved on to 2-stage to over 50,000....eventually higher, but on smaller motors than the above. More like a 3in M to a 54 L.
Charlie has been working on a 150,000 as well as Don. 1 a 2-stage N to N the other a Q. Hopefully we will have finished all our testing and be flight ready for all 3 flight for Ball next year.
Good luck.
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