| General > General Technical Chat |
| Force multiplier |
| << < (18/71) > >> |
| electrodacus:
--- Quote from: IanB on February 07, 2023, 10:23:55 pm --- There is no locked gearbox. --- End quote --- Prove that. Show that vehicle moving in that configuration without any wheel slip. It is just impossible for that vehicle to move without either the input or output wheel's to slip. I already proved that is the case in my videos with full explanation of what happens. The equation's also show what happens F2=F1 means displacement is also equal and opposite thus no movement. If body is connected to ground of course it will also not move but you can have force multiplication F2 = F1 * A2/A1 So with a gear ratio of 2:1 you will have F2 = 2 * F1 but since P out can not be more than P in that means displacement at F2 is half that at F1 thus vehicle body is not moving (it will be impossible anyway as it is connected to ground). |
| PlainName:
--- Quote ---Show that vehicle moving in that configuration without any wheel slip. --- End quote --- A thought experiment: Instead of the belt driving the right wheel, let's think what happens if the belt is freewheeling and we drive the left wheel. That is, we move the vehicle to the right. The left block is fixed so the left wheel turns clockwise. The connecting belt or chain causes the right wheel to also turn clockwise but at a faster speed because of the gearing. The freewheeling horizontal belt then whizzes past, right to left, because of the right wheel turning. Apart from the Hand of God moving the vehicle to the right, what's wrong with that? |
| electrodacus:
--- Quote from: PlainName on February 07, 2023, 10:43:29 pm --- --- Quote ---Show that vehicle moving in that configuration without any wheel slip. --- End quote --- A thought experiment: Instead of the belt driving the right wheel, let's think what happens if the belt is freewheeling and we drive the left wheel. That is, we move the vehicle to the right. The left block is fixed so the left wheel turns clockwise. The connecting belt or chain causes the right wheel to also turn clockwise but at a faster speed because of the gearing. The freewheeling horizontal belt then whizzes past, right to left, because of the right wheel turning. Apart from the Hand of God moving the vehicle to the right, what's wrong with that? --- End quote --- Not quite sure in what direction it will freewheel ? And of course the "Hand of God" is not allowed and that is involved in the animation someone showed in the past. F1 should be the only input and not some invisible force pushing the vehicle body. I guess that is what you imagine when you think about the freewheel. |
| PlainName:
It's a thought experiment. Instead of Hand of God, you can stand there and push it if you want. So, there is no driving or braking on the horizontal belt. It is free to move in either direction. If you move the vehicle to the right, won't the belt be turned to the left? Forget F1 and all that. It is a simple setup. Push the vehicle to the right, the left wheel turns, the right wheel turns, the belt moves. Is that not the case? |
| PlainName:
--- Quote ---Not quite sure in what direction it will freewheel ? --- End quote --- OK, let's make it simple. Just say at which point you disagree (and why): 1. You, HoG or something moved the body to the right. 2. The left wheel rotates clockwise. 3. The right wheel rotates clockwise. 4. The right wheel rotates faster than the left wheel. 5. The rotating right wheel pushes the horizontal belt to the left. There. If you say where you get lost then we know where to concentrate on clearing it up. |
| Navigation |
| Message Index |
| Next page |
| Previous page |