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quote:Originally posted by eric lI think that the gyroscopic effect in bicycle riding is highly overrated here ! Bicycle wheels are very light when compared to the total weight of bike + rider. And if the gyroscopic effect is as important as you state here, then the old penny-farthing bicycles (with the high frontwheel and the small rear wheel) would be more stable than the modern bikes. I can assure you this in NOT the case.The effect of turning to the right when you turn your handlebars to the left is related to geometry of the bicycle. The line from the axle of your front (=steering) wheel to the steering head is not vertical, so if you turn your handlebar to the left, the frame of the bicycle (and your body) wil be inclined to the right. Inclining to the right will make you turn right. (That is also the way you steer when you take your hands off the handlebars.) This is not only true at low speeds (I would not call 30 km/h a low speed for a bicycle rider anyway). Just watch speedway races or the American dirttrack races for motorbikes.The main reason why it is easier to stay upright on a moving bicycle is that it is much easier to make corrections while moving. And if you want to estimate how many corrections you make when riding a bicycle, just make a stretch over wet sand (e.g. on the beach, just after high tide), and observe the tracks of the front and rear wheels. Remember the front wheel is the one you make the corrections with.
quote:The line from the axle of your front (=steering) wheel to the steering head is not vertical, so if you turn your handlebar to the left, the frame of the bicycle (and your body) wil be inclined to the right. Inclining to the right will make you turn right.
quote:Originally posted by eric lWith a motorbike you have more gyroscopic effect from the flywheel of the engine and the rotor of the alternator than from the wheels.
quote:And your frame will tilt to the right if you turn your handlebars to the left even at standstill, when there is no question of gyroscopic effect.
quote:Originally posted by eric lOK, so you are going through a turn with your TZ750 at 30 km/h, at an angle at which you would fall if you and the motorcycle would stand still. But that is simply because turning at that angle you are in equilibrium ! In fact, if you would stay vertical (I do not use the word upright on purpose) cornering at that speed, you would fall off, but on the other side.Watch a car going through a corner at even a moderate speed. You can not lean it over like you lean over a bicycle or motorcycle. And what will you see ? Due to inertia - which in this case will be called "centrifugal force" - the car will be pushed to the outside, and the suspension will allow it to be tilted outwards (unless the car has a really sophisticated computer controlled suspension). The stiffer suspension of a sports car will allow it to corner faster before tilting over.Cornering on a motorcycle, you lean over to the inside, so that the resultant of centrifugal force and gravity pass through the line between the contact patches where your front and rear wheels touch the road.And the importance of the gyroscopic effect of the engine is demonstrated in trials (I mean the sport), where the rider revs up the engine while letting the clutch slip so that he (or she) can profit from the gyroscopic effect without the wheels turning.