okay, COP can be infront of COG just fine.
No. It can't.
"The conditions for a stable rocket are that the center of pressure must be located below the center of gravity."
https://spaceflightsystems.grc.nasa.gov/education/rocket/rktstab.html
And when spayyze sex states a rocket is firing its engines in order to land on the end where the engines are located, it is selling everyone a bill of goods.
ETA: This is NOT A QUESTION OF AERODYNAMICS!!! This is a question of STABILITY, leading to the use of control systems to provide the aerodynamics! Without CoP behind (or below) CoG, it does not matter what type of control system is used. The rocket will be unstable and crash.
Stop being so ignorant! You claim "This is NOT A QUESTION OF AERODYNAMICS!!! This is a question of STABILITY"!
Aerodynamics is largely about stability!
Yes, "This is a question of STABILITY, leading to the use of control systems to provide" stability and automatic control systems can readily provide stability even when the system is aerodynamically unstable without the control system.
What does page 9 of
Apollo Documents tn_d-5869_1970023342.pdf look like?Now it does not contain the exact words "The CoP/CoG relationship", but how do YOU interpret the following words:
Another problem is that the vehicles are aerodynamically unstable during most of the propelled flight in the atmosphere. As an example, Figure 6 is a plot of the center of pressure and the center of mass for the first phase of the Saturn V and shows that the vehicle is unstable except for a short period of time around the 60th flight second.
from page 9 of the above document! and here is the figure:
Surely, even you are smart enough to interpret this "plot of the center of pressure and the center of mass".
In that figure you can see clearly see that the Centre of Pressure (CoP) is forward of the Centre of Mass (CoG) for almost all the flight. In other words the Saturn V is purely reliant on the vectored thrust from the gimballed engines for stability - ie dynamic stability!And in case a fuss-pot like yourself questions the difference between CoM and CoG. The only difference if when "g" varies significantly over the dimensions of the object under consideration. And, I would venture to claim that it is actually CoM that is the relevant one for vehicle stability.
Whatever YOU claim you are completely wrong! You just sprout words, I give evidence from people many times more knowledging than you or your alter ego Puppies Legbone.
Now come up with an explanation or relevant references to prove you are right or just give up!