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sba2013-08-27 19:58:39
Physics
sba, 2013-08-27 19:58:39

Turning without turning the steering wheel

Dear comrades, I ask you to tell me whether it is possible to turn a two-wheeled vehicle solely due to the inclination (shift of the center of gravity)? Naturally, without turning the steering wheel. Ideally, the vehicle should not have a steering wheel at all. Exclusively 2 rigidly connected wheels. If such magic is possible, please tell me the approximate turning radius, minimum speed and all that. I also ask you not to be surprised at such a Friday question, despite the fact that today is not Friday. The question is not so much for me, but for my friend. Although, I know that most did not believe me :)

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9 answer(s)
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MiXei4, 2013-08-27
@MiXei4

Here are interesting arguments and experiments - www.scooterdigest.ru/pub.asp?id=4753

I
Ivnika, 2013-08-27
@Ivnika

If we assume that the wheels are fixed rigidly relative to each other, but have tires, then there will be a turn.
Imagine the area of ​​​​contact of the tires with the surface - this is an oval. When tilted, the oval will “bend” a little, respectively, the friction forces will be redistributed differently.

D
Dimond17, 2013-08-27
@Dimond17

if you go to the outer radius in a profiled turn, you can drive through it without turning the steering wheel

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Snowindy, 2013-08-27
@Snowwindy

You may also be interested in such a trick as "counter steering": to turn in one direction, the steering wheel is turned in the opposite direction for a fraction of a second, thus causing the vehicle to lose balance and "fall", starting the turn with an inclination.

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barker, 2013-08-27
@barker

Do you mean normal wheels? Then no, perhaps. Or perhaps some new engineering solution?

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Vyacheslav Golovanov, 2013-08-27
@SLY_G

Rigidly connected wheels, of course, will not be able to go in circles.
And without a steering wheel - plenty. For example, a bicycle or motorcycle can be controlled without a steering wheel, slopes (at low speed).
There are also two- wheeled skateboards of different designs.
But their wheels rotate around a vertical axis.

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vovagubin1987, 2013-08-28
@vovagubin1987

I suggest to sharply brake one wheel.
And so, any movements in a closed system (that is, such movements that interact only with the machine system and do not interact with the external environment) are not able to affect the direction of movement, except if the movement is not subject to external forces or does not move in a straight line. In your case, you can transfer the entire mass to one front wheel, and in this case, the friction force acting on the wheel will increase and you will get a non-zero moment of forces from the side of the road surface.

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kosmos89, 2013-08-28
@kosmos89

Ball train does not have swivel wheels: en.wikipedia.org/wiki/ Ball train . I guess the chute there serves just to set the slope, and the slope provokes a turn. Due to this, the train always remains in the chute.

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