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If the earth had curve this unit would match the curve, however in flight it's flat and stationary during cruising altitude. There 0% degree change for the entire flight. THE EVIDENCE IS GROWING IN ABUNDANCE VIDEO PROOF https://www.youtube.com/watch?v=JAw0NEzY9AU a gyroscope works
By Cef (Terry) Pearson have searched through many texts. But I have never found an explanation of why a gyroscope should resist being turned in any direction perpendicular to it's axis. Maybe the workings of a gyroscope seem obvious to some and needs no explanation. But still, other obvious physical phenomena are explained. So here is the first published (that I know of) account of the physics behind how a gyroscope works.Here is a pictorial of a simplified version of a gyro.Instead of a complete rim, four point masses, A, B, C, D, represent the areas of the rim that are most important in visualizing how a gyro works. The bottom axis is held stationary but can pivot in all directions.When a tilting force is applied to the top axis, point A is sent in an upward direction and C goes in a downward direction. FIG 1. Since this gyro is rotating in a clockwise direction, point A will be where point B was when the gyro has rotated 90 degrees. The same goes for point C and D. Point A is still traveling in the upward direction when it is at the 90 degrees position in FIG 2, and point C will be traveling in the downward direction. The combined motion of A and C cause the axis to rotate in the "precession plane" to the right FIG 2. This is called precession. A gyro's axis will move at a right angle to a rotating motion. In this case to the right. If the gyro were rotating counterclockwise, the axis would move in the precession plane to the left. If in the clockwise example the tilting force was a pull instead of a push, the precession would be to the left.When the gyro has rotated another 90 degrees FIG 3, point C is where point A was when the tilting force was first applied. The downward motion of point C is now countered by the tilting force and the axis does not rotate in the "tilting force" plane. The more the tilting force pushes the axis, the more the rim on the other side pushes the axis back when the rim revolves around 180 degrees.Actually, the axis will rotate in the tilting force plane in this example. The axis will rotate because some of the energy in the upward and downward motion of A and C is used up in causing the axis to rotate in the precession plane. Then when points A and C finally make it around to the opposite sides, the tilting force ( being constant) is more than the upward and downward counter acting forces.The property of precession of a gyroscope is used to keep monorail trains straight up and down as it turns corners. A hydraulic cylinder pushes or pulls, as needed, on one axis of a heavy gyro.Sometimes precession is unwanted so two counter rotating gyros on the same axis are used. Also a gimbal can be used.THE GIMBALED GYROSCOPEThe property of Precession represents a natural movement for rotating bodies, where the rotating body doesn’t have a confined axis in any plane. A more interesting example of gyroscopic effect is when the axis is confined in one plane by a gimbal. Gyroscopes, when gimbaled, only resist a tilting change in their axis. The axis does move a certain amount with a given force.A quick explanation of how a gimbaled gyro functions a simplified gyro that is gimbaled in a plane perpendicular to the tilting force. As the rim rotates through the gimbaled plane all the energy transferred to the rim by the tilting force is mechanically stopped. The rim then rotates back into the tilting force plane where it will be accelerated once more. Each time the rim is accelerated the axis moves in an arc in the tilting force plane. There is no change in the RPM of the rim around the axis. The gyro is a device that causes a smooth transition of momentum from one plane to another plane, where the two planes intersect along the axis.
Before we can say what the accelerometer of the iPhone does, we need to understand the basics of what an accelerometer does in general. The accelerometer is a device that can measure the force of acceleration, whether caused by gravity or by movement. An accelerometer can therefore measure the speed of movement of an object it is attached to. This is the job of the accelerometer in the Nike + iPod used in running shoes. The piezoelectric sensors can tell if the shoe they are in is moving (in the instant that it is not, the device shuts itself down) and, based on the amount of time the shoe is on the ground vs. the amount of time it is in the air, the iPod can convert this information into an accurate measure of the speed at which the runner is moving.Because an accelerometer senses movement and gravity, it can also sense the angle at which it is being held. This is what makes the Wii work: Instead of a joystick, the user or player manipulates a controller (rather like a remote control). The controller contains solid-state accelerometers, which can sense the tilt, movement and speed being applied to them, as well as the direction in relation to the Wii's screen. This allows the player to use natural, intuitive motion. When you play, for instance, a sword-fight game, the controller is used as if it was the sword, with the movement translated into electric signals to the computer.