Engineer
Major
Re: J-20 The New Generation Fighter Thread IV
ROFL! Your pseudoscience doesn't work here. Pitch vector is not an up direction vector! In fact, pitch vector is perpendicular to up (Z) vector as illustrated by the following diagram:
Pitch vector must be perpendicular to side component of thrust and moment arm, as this animation illustrated. Light blue at the pivot corresponds to moment, your so called pitch vector. Red is the moment arm. Dark blue is analogous to up/down thrust component. No lift vector was ever created.
ROFL!
Firstly, a fighter turn rate can only be affected by lift. Vertical component of thrust only result in torque with no lift, because that component is not exerted on the aircraft's center-of-gravity. This is basic physics. Secondly, for the aircraft to pitch up the thrust vector must also be deflected upward, and so the thrust component is directed upward. That would kill lift even according to your fantasy. which explains the situation:
Pitch up requires vector up, and vectoring up kills lift. Thirdly, Harrier is a V/STOL aircraft and can hover in the air. F-16, F-18, and F-22 cannot use their thrust vectoring to hover, proving that no lift is created by their nozzles.
Look i have never said you are less smart or i love F-22, never i meant that if you felt offended sorry, i never meant for you to feel insulted.
However i will be truely honest, vectorial algebra or basicly linear algebra states that momement, torque and basicly all objects have direction and magnitude when they move.
If you understand that you will understand what i said, i said lift and thrust are vectors, as such have direction.
Pitch has a direction is up or down and a magnitude is called pitch rate.
Torque has a direction and a magnitude, and it is the product of vectors, the center of gravity is a a vector projection of the gravity pulling down vector
Torque has a direction simply becuase if you open a door it opens into one direction simply like that and opens with a pitch rate or speed, you can slam the door or open it slowly.
Pitch or torque is the cross product of two vectors on a jet, gravity vector from center of gravity and thrust projection based upon the vertical force it generates.
When a jet turns with thrust vectoring the thrust is having a projection based upon two angles.
It is a fact thrust vectoring increases turn rate, lift is a up direction vector, pitching up also is a up direction vector.
ROFL! Your pseudoscience doesn't work here. Pitch vector is not an up direction vector! In fact, pitch vector is perpendicular to up (Z) vector as illustrated by the following diagram:
Pitch vector must be perpendicular to side component of thrust and moment arm, as this animation illustrated. Light blue at the pivot corresponds to moment, your so called pitch vector. Red is the moment arm. Dark blue is analogous to up/down thrust component. No lift vector was ever created.
ROFL!
The end result is Fighters increase turn rayes because the projection of thrust upon the axis of the jet increases the picht rate on a nose up direction, gravity as a vector is pulling down against lift, but thrust creates two projections one vertical for that you use sine and one horizontal for that you use cosine.
The center of gravity is also a vector, if you have studied the cross product of two vectors you will see the center of gravity is a horizontal projection of the gravity pulling down.
If you cheked well the formulas i posted, which by the way are not mine, i gave you the resources, you will understand what i said.
I have no hard feelings to you in fact i do not care if you beleive me or not, i know perfectly thrust vectoring has a vertical element and has a horizontal element, i know it increases turn rate in fighters like F-18, F-22, F-16 or Eurofighter as well as Harriers.
Firstly, a fighter turn rate can only be affected by lift. Vertical component of thrust only result in torque with no lift, because that component is not exerted on the aircraft's center-of-gravity. This is basic physics. Secondly, for the aircraft to pitch up the thrust vector must also be deflected upward, and so the thrust component is directed upward. That would kill lift even according to your fantasy. which explains the situation:
Vectoring was intended primarily as a moment-producing effector, so vectoring the plume up would cause a noseup pitching moment. But the exhaust plume vectored up would decrease the lift coefficient in the adverse direction while increasing the pitching moment coefficient in the proverse direction.
Pitch up requires vector up, and vectoring up kills lift. Thirdly, Harrier is a V/STOL aircraft and can hover in the air. F-16, F-18, and F-22 cannot use their thrust vectoring to hover, proving that no lift is created by their nozzles.