@Xaustein They don't produce net force but they produce something like net moment - with other words, you can't push yourself from nothing but you can rotate yourself from inside, from internal system changes. And if something from outside make a stand against this rotation, a reaction appears, which can be used (like I use it in this simulation).
@ferenckarvak I didn't try it but it's realy easy to check if this is truth.
This check can be done if you sit in a cradle with two rotating bicycle wheels in your outstretched arms (rotation of the wheels must be like is shown on the video) and when you begin to collect your arms in front of you, the cradle must begin start rotation "forward" (or "backward").
@savata71 I am saying that you get a moment inwards, hence no forwards motion. This was looked at in the 1970s and is a common mistake that gyros can be used for forward propulsion. The precession pushes inwards and is a torque about an axis.
@sorova Look, here the forward propulsion is caused by the four motors on each wheel - the green things in the axes of the wheels are motors.
Now look at the motor which is mounted up there on the mast - this motor rotates the upper gyro, applying torque on the gyro. Down there at the base of the mast another motor with opposite torque is mounted - it rotates the lower gyro. So the reactive moments of these two motors balance each other.
The result of these torques applied at the gyros is a gyroscopic moment on each gyro.
Each of these gyroscopic moments through the mast acts on the car and tries to rotate the chasses in plane perpendicular to horizon. In position when the axes of the gyros are perpendicular to the longitudinal axis of the car, the two gyroscopic moments balance each other. But when the axes of the gyros become parallel to the longitudinal axis of the car, they are summed.
And if this summary gyroscopic moment is bigger than the moment which G (weight of the car, the gravity force in the center of mass of the car) can causes about one of the driving wheel axis, a rotation starts about that axis and that’s why one end of the car rises – and reaction force in the other end becomes equal to G.
@savata71 (continued 3 - correction of continued 2)
........... – and reaction force R in the other end becomes equal to G+F , where F=ma is inertia force which appears in the center of mass so as to be satisfied the condition (G+F)*L=M , where L is the “arm” of the moment which G causes about rotation axis. M is the summary gyroscopic moment.
@savata71 hmm. come to think of it youre right. there are many practical issues however, right? otherwise there would be a functional physical prototype already...
the intellectual answer is gyroscope.. the practical answer is bigger tires and more beer..
MrMeanderthal 1 month ago
The two gyro producet net motion.
Greetings
Xaustein 2 months ago
@Xaustein They don't produce net force but they produce something like net moment - with other words, you can't push yourself from nothing but you can rotate yourself from inside, from internal system changes. And if something from outside make a stand against this rotation, a reaction appears, which can be used (like I use it in this simulation).
savata71 2 months ago
hmmm. verry interesting concept. Try to realise it!
ferenckarvak 2 months ago
@ferenckarvak I didn't try it but it's realy easy to check if this is truth.
This check can be done if you sit in a cradle with two rotating bicycle wheels in your outstretched arms (rotation of the wheels must be like is shown on the video) and when you begin to collect your arms in front of you, the cradle must begin start rotation "forward" (or "backward").
savata71 2 months ago
@savata71 The cradle will start rotation "foreward" If rotation of the wheels is like the shown on the video.
savata71 2 months ago
@savata71 thanks for answer.
ferenckarvak 2 months ago
Doesn't work! Common mistake, The gyro produced a torque 9a moment) and not a linear force forward. There is no net motion.
sorova 3 months ago
@sorova Where you see linear force? Here are only moments shown in the video. Look again.
savata71 3 months ago
@savata71 I am saying that you get a moment inwards, hence no forwards motion. This was looked at in the 1970s and is a common mistake that gyros can be used for forward propulsion. The precession pushes inwards and is a torque about an axis.
sorova 3 months ago
@sorova Look, here the forward propulsion is caused by the four motors on each wheel - the green things in the axes of the wheels are motors.
Now look at the motor which is mounted up there on the mast - this motor rotates the upper gyro, applying torque on the gyro. Down there at the base of the mast another motor with opposite torque is mounted - it rotates the lower gyro. So the reactive moments of these two motors balance each other.
(continues!)
savata71 3 months ago
@savata71 (continued 1)
The result of these torques applied at the gyros is a gyroscopic moment on each gyro.
Each of these gyroscopic moments through the mast acts on the car and tries to rotate the chasses in plane perpendicular to horizon. In position when the axes of the gyros are perpendicular to the longitudinal axis of the car, the two gyroscopic moments balance each other. But when the axes of the gyros become parallel to the longitudinal axis of the car, they are summed.
savata71 3 months ago
@savata71 (continued 2)
And if this summary gyroscopic moment is bigger than the moment which G (weight of the car, the gravity force in the center of mass of the car) can causes about one of the driving wheel axis, a rotation starts about that axis and that’s why one end of the car rises – and reaction force in the other end becomes equal to G.
savata71 3 months ago
@savata71 (continued 3 - correction of continued 2)
........... – and reaction force R in the other end becomes equal to G+F , where F=ma is inertia force which appears in the center of mass so as to be satisfied the condition (G+F)*L=M , where L is the “arm” of the moment which G causes about rotation axis. M is the summary gyroscopic moment.
savata71 3 months ago
@savata71 So what are the Gyros for? are they for steering or something?
sorova 3 months ago
those gyroscopes would be too big to be considered reasonable engineering irl
omg5501 4 months ago
@omg5501
No, man! You can increase the speeds and this will let you to decrease the size of the rotating disks.
Also you can put more disks – for example, it can be mounted 2 more disks here, opposite to the shown disks, on the same axes.
savata71 4 months ago
@savata71 hmm. come to think of it youre right. there are many practical issues however, right? otherwise there would be a functional physical prototype already...
omg5501 4 months ago
those gyroscopes would have to be too big to be considered reasonable engineering irl
omg5501 4 months ago
Have you tried to make this in real life?
sfomail 1 year ago
@sfomail
No. But as I watch other movies with gyros, I'm sure this will work in real life and fully meets the specific behavior of the gyroscope.
savata71 1 year ago
lol nice video :D
can you tell me what software are you used?
xato909 1 year ago
@xato909
I made the models with Solid Edge and then I used Visual Nastran 4D for this simulation
savata71 1 year ago
@xato909 it looks like phun physics software.
evremselle 9 months ago