I never thought of the center of mass acting as the pivot point. As soon as that was mentioned it all clicked into place in my head and I finally understood why it needs to be in front of the CP. Question. If the CP is definitely behind the center of mass, is it possible for the rocket to flip? I have a small Loc model rocket that flew perfectly on A thru C motors, but then one day just started flipping across the launch area shortly after leaving the rod. The only thing that was different was the batch of C motors I was using. I even tried adding more weight to the nose and it would still spiral/flip. I do not want to test it anymore due to the dangerous flights but it has been eating me up ever since and no one at my rocket club could explain why it flew fine in the past but no longer works.
Maybe something got damaged and misaligned and created lift somewhere along the body , and when the force from lift increased it further worsened the instability. Or Motor misaligned for same reason?
I am close more understanding the CP. How i calculate the CP? Or how i find it? i see the corect way is make integer of things wich i dont know. But to start understand it better is omething what can i experiment like the CG? You can find the CG on an object when is maintain is balance in finger and there you fing the CG aprox. Exist something like the for CP? The roster is good example but anything more? Nice explanation and graphic to shw how it work. Thnks.
Finally a video that explains this with all the forces, thank you
Thanks. In deed this is the first video that explains everything clearly. Thank you
The best explanation of CP & CG I ever saw.
Question: A rocket is roundly symmetric but is the body supposed to produce lift besides the fins?
the body produces lift but not as much as the fins
I never thought of the center of mass acting as the pivot point. As soon as that was mentioned it all clicked into place in my head and I finally understood why it needs to be in front of the CP.
Question. If the CP is definitely behind the center of mass, is it possible for the rocket to flip? I have a small Loc model rocket that flew perfectly on A thru C motors, but then one day just started flipping across the launch area shortly after leaving the rod. The only thing that was different was the batch of C motors I was using. I even tried adding more weight to the nose and it would still spiral/flip. I do not want to test it anymore due to the dangerous flights but it has been eating me up ever since and no one at my rocket club could explain why it flew fine in the past but no longer works.
Maybe something got damaged and misaligned and created lift somewhere along the body , and when the force from lift increased it further worsened the instability.
Or
Motor misaligned for same reason?
Lots of value ❤
I am close more understanding the CP. How i calculate the CP? Or how i find it? i see the corect way is make integer of things wich i dont know. But to start understand it better is omething what can i experiment like the CG? You can find the CG on an object when is maintain is balance in finger and there you fing the CG aprox. Exist something like the for CP? The roster is good example but anything more?
Nice explanation and graphic to shw how it work. Thnks.
Good work man 👍👍👍
Well explained. Thank you.
Any clues as to the minimum TWR for a stable rocket which could go up straight, at least 1000 meters??? Thanks
where is center presure calculated..
1/4 from Wind pressure point?
What happens when you have 3x the cp to cg? Example a 3 in tube that has a 9 in gap between the cp and cg.
That provides great stability
That's a good thing, the longer that distance the more stable the rocket.
Model rocket speaning around the nose cone due to over stable.
👍👍🚀💥
Huh i guess i am smarter than I thought i already know this to some extent
so pendulum rocket fallacy isn't false then
😂 😂 😂 😂
Long slender bodies do not obey classical circulation theory. Someone needs to think again.
Does this apply to rockets below