Center of Pressure in Open Rocket

Is the center of pressure in Open Rocket measured from the most aft end of the body tube (fin can), or the most aft component of the rocket? For example, I included a mass object sticking off the back end of my design to represent an AeroPack retainer that extends just past the end of the fin can airframe. The difference would be minimal, but I just wanted to know for the sake of being accurate in marking the CP on the rocket body. Thanks.

From the tip of the nose cone by default.

OF COURSE!!! I read your answer and said to myself, 'I knew that'. I'm getting stuff prepared for a possible Level 2 attempt next weekend and double checking everything. Classic case of over-thinking. Now a bunch of people are going to see my dumb question and go, 'This guy is attempting his level 2? God help us all!'

kjkcolorado said:

OF COURSE!!! I read your answer and said to myself, 'I knew that'. I'm getting stuff prepared for a possible Level 2 attempt next weekend and double checking everything. Classic case of over-thinking. Now a bunch of people are going to see my dumb question and go, 'This guy is attempting his level 2? God help us all!'

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Well if anyone gives you any guff about it, just tell them you were planning to fly it backwards. :wink:

God help us all.

Bat-mite said:

God help us all.

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Thanks.... I did ask for that.