I have been experimenting in open rocket with stability and fins. I have noticed that if i trim fins down the caliber goes down for stability drastically IE i took off 1.5 inches of height and the caliber went from 5.51 to 3.3.
So, what i want to learn and understand is whats going on with the physics of this.
Why would a fin that has a larger height cause more calibers of stability? is it due to more surface area causing more drag, causing the Cp to be further back? or is there more to it than that? or does the larger fin cause more drag and lift which can affect behavior? What behavior is it changing? pitch? yaw? both? and how do i examine this in open rocket or something? IE, take my rocekt with larger fins, see the data, then compare it to same rocket smaller fins. I see options in plotting the data for pitch, yaw, roll etc. The graphs look interesting.
or do larger fins cause vortex shedding and turbulence which can be a no no?
i am super curious now what is going on.
thanks
any feed back on this subject is wlecomed
So, what i want to learn and understand is whats going on with the physics of this.
Why would a fin that has a larger height cause more calibers of stability? is it due to more surface area causing more drag, causing the Cp to be further back? or is there more to it than that? or does the larger fin cause more drag and lift which can affect behavior? What behavior is it changing? pitch? yaw? both? and how do i examine this in open rocket or something? IE, take my rocekt with larger fins, see the data, then compare it to same rocket smaller fins. I see options in plotting the data for pitch, yaw, roll etc. The graphs look interesting.
or do larger fins cause vortex shedding and turbulence which can be a no no?
i am super curious now what is going on.
thanks
any feed back on this subject is wlecomed
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