Charles_McG
Ciderwright
3.1415926535897932384626433
I want to see you cut and measure to 26 significant figures.
3.1415926535897932384626433
If I would have just put 3.14... some smart ass would have posted the 26 figures... so I figured I'd post the 26 figures, and then some... well.... nevermind.... have a great day. lolI want to see you cut and measure to 26 significant figures.
If I would have just put 3.14... some smart ass would have posted the 26 figures... so I figured I'd post the 26 figures, and then some... well.... nevermind.... have a great day. lol
Accuracy is paramount in rocketry!!3.1415926535897932384626433
Thanks for the enlightenment provided on my questions. I’ve learnt something new. Now before this thread gets highjacked...... back to the Atlas-able to see if it really has enough base drag to be stable.I don’t like to appear dumb but.....here goes. How can this rocket be stable with no fins? And what does the long narrow triangle at the back end of the rocket in the OR drawing mean?
It is, after all, rocket science.Accuracy is paramount in rocketry!!
It might be possible to incorporate a "Drag Plate", on the base of the Atlas-Able, to increase Base Drag if the available configuration does not provide a "sufficient amount" ( whatever that value is ).Thanks for the enlightenment provided on my questions. I’ve learnt something new. Now before this thread gets highjacked...... back to the Atlas-able to see if it really has enough base drag to be stable.
More than good enough for government work!3.1415926535897932384626433
I want to see you cut and measure to 26 significant figures.
If I am not using a calculator with a Pi key, I use either 3.1416 or 3.1415926, depending on the material being scaled.If I would have just put 3.14... some smart ass would have posted the 26 figures... so I figured I'd post the 26 figures, and then some... well.... nevermind.... have a great day. lol
Charles,Measure it with a micrometer.
Mark it in chalk.
Cut it with an axe.
In other words, length is the same as the base circumference.Thick skull here.....PI x Diameter........PI is?
Never mind got it PI is Pi 3.1415.......
At 14 mph I doubt base drag hack is gonna hack it, not sure if the biggest fins in the world would help.
Consider those quotes together. Composite motors might give you the speed you need to make whatever stabilization method you choose work.I don't see where I'd gain anything by using composite motors.
And for once in this lifetime, I would not have been that smartass. But I would add that the old 22/7 is surprisingly close, only 0.04% off, or four digits accuracy. And 355/113 is merely 85 parts per trillion. An easy to remember six digits get's you seven digits of accuracy. (Take 113355, split it in the middle to 113 and 355, then put the bigger one on top.)If I would have just put 3.14... some smart ass would have posted the 26 figures...
Composite motors might give you the speed you need to make whatever stabilization method you choose work.
Oh, I get that. So I wonder how else to get that speed up. 29 mm BP motors?
E16 and F15, with D12 for reference.
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deleteIf I am not using a calculator with a Pi key, I use either 3.1416 or 3.1415926, depending on the material being scaled.
Dave F.
I dunno, I’ve heard nuclear weapons are kinda like a game of horse shoes. Close enough is often adequate.Accuracy is paramount in rocketry!!
If you haven't started building yet, I may have a dead one of those around to donate to the cause.This morning, when I went to brush my teeth, and I had an epiphany.... lol
View attachment 574549 View attachment 574551
The possible issue is the 14 mile per hour speed at staging. @BABAR raised a concern (a year ago) that at that speed the base drag may not help enough, since all drag is very low at such a small speed. Fins don't work at such a low speed either, which is the main reason for needing a minimum speed off the rod (not that you're using fins here). It's that staging speed that @Tobor was trying to address with his suggestion of composite motors. This is all I was trying to address in response to your response to him asking why composites. He suggested composites in order to get the speed at staging up.
And then, since BABAR may have a point, and you certainly have a good point about simultaneous ignition with composites, I wonder what else could be done to get the speed at staging up. Such as the higher thrust, 29 mm BP motors.
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