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Main > Manuals > The book about piloting sportbikes > The Chapter 11. Landing of the driver - person and machine
 

The Chapter 11. Landing of the driver - person and machine

Whether you trust in stability of a motorcycle? He is predicted whether or not? What role play personally you?

Predictability

Yours bike is predicted practically in any situation, for example, during drift (see previous chapter). The driver is a dark horse, unpredictable both unstable fraction of a system. And an alone problem of the driver are SPI's. However, among the racers the histories about malicious will of motorcycles go, which one pursue the unloved racers. To you an example.

Each four circles

Once, during national competing, to me my schoolboy has approached and has said: " Each four circles, in such turn (is passed on 120 miles per hour, at once behind it - lengthy straight line) the motorcycle starts to be rocked, the forward sprocket lifts off (strong chatter), and I can not invent in any way how customize the suspension ".

He was very much baffled, and I could to him help. Step-by-step picture has elucidated. "Wait", - I have said, - " the motorcycle can not do something each four circles. And the racer - can. Try not so hardly to compress a control surface in turn, it should help ". Also has helped. Then, overwrite of a circle up to finish, for it has broken left-hand clip-on, but he a smog to arrive by fourth and has shown time of a circle all for 2,5 seconds worse, than best time of that day. It is understandable, that it is impossible to compress a control surface consisting only from one half.

Landing and coupling with a road

The driver is the cause of mysterious behavior of a motorcycle. For this purpose it has many capabilities. All is reduced in the final accounting to loss of stability and coupling with a road, but these two factors and are the cause of actuation SPIs.

Change weight, as we have seen in section about control of gas, - apparent cause of reduction of coupling. However landing also very much hardly influences coupling. As soon as you will understand it, for you the set of capabilities will appear to reduce this influencing. For example, at inhibition many hardly exert, displacing weights forward thereby there are more, than it is necessary.

Attempting to hold at inhibition of weight in region of a tank and reducing thereby effort on a control surface, you reach two things: (1) back sprockets remain on ground (at very strong inhibition) little bit longer and (2) the forward suspension still has greater fuel distance, she watches better irregularities, so the stability and coupling with a road is enriched.

Landing in turns

Many drivers remain tight and after inhibition. Then the top of a body aims to move forward under effect of deboosting by value in 0,2-0,3 G, prolonging exuberantly to load before. Up to 100 superfluous pounds is displaced forward instead of remaining in region of a tank, i.e. on 24-36 of in is closer in a back sprocket. And all because you have forgotten to relax.

Smoothly varying gas

One more advantage of the weakened landing occurs as soon as you will begin to be accelerated. If you are already weakened, you do not need to displace these 100 pounds back. Therefore change weight becomes more smoothly varying from the very beginning of acceleration. It brings huge advantage, as your purpose - weight 40/60 - is reached much faster. Be relaxed at once after the termination.

Taxiings. In an ideal case, you should relax, as soon as trunks "were seized", i.e. at the moment of achievement of desirable angle of lean.

The fissile suspension

There is one more way to lower unfavorable influencing on the suspension, specially on sites with strong irregularities. It awake use in cross-country race and on jumps. At pass of an irregularity attempt to rise from a saddle (it it is possible to make even in time hanging). Then your legs become a fissile part of the suspension, and weight will be displaced below. Besides as you will not jump on a seat, you eliminate leaps, influential on coupling with a road. Use legs for maintenance of weight of your body, do not use for this purpose a control surface.

If you will rise from a seat in time or drift, it will allow independently to be stabilized, as weight will be applied below. Than less weight of a body , the faster is stabilized.

Sit quietly

The set-up of suspensions is done for definite weight in a definite rule, instead of for miscellaneous weights and not for weights in miscellaneous rules. It means, that bike can not watch your moving on it. Looking on bike for the Grand Prix, becomes clear, that the racer can not move too hardly neither forward nor back.

I have taken a problem weigh many of years back. In attempt completely to relax, I simply lay down on a tank in turn. It has improved a controllability, specially in sluggish and medium-rate turns. The outcomes were improved. I did not realize, as far as hardly of weight shifted forward, yet has not lost a back sprocket completely unexpectedly in one of fast turns. I began to experiment other motorcycles, but has come furthermore to outcome - back sprocket is lost is much more lighter, if you lie on a tank. Bike was theoretically customized under my weights, it was not pleasant simply to him, where exactly this weight was, and I have not guessed to change of set-up under new landing.

Change weight

While you hold legs on steps, weight varies only at moving of a top of a body forward and back. From 10 up to 40 pounds can be displaced forward by simple slope, if you do not keep for a control surface, and even it is more, if keep. It is very important from the point of view of coupling with a road.

However, in a lift-off time, after that the coupling is casted, even if you lie on a tank, you practically do not displace weight forward (so do not struggle in wheelie) - while you will not deliver a leg on steps. At acceleration it is the most friend landing. Raise legs fast.

Displacement of weight

In fast turns, when the wind attempts to reset the driver from a saddle much are tilted forward, reducing thereby coupling of a back sprocket. It is necessary simply to keep low and to push an elbow more tightly. It is possible also to customize the suspension so that to increase of weight on a back sprocket. To lower back, to raise before, to raise all bike bodily, to shift a back sprocket forward - four ways to shift of weight back.

And still, the habit hover on a control surface will put that bike will be unstable and begins to drive more widely turns. And it at all that is necessary for you.

Landing of the driver

The suspension can be customized on miscellaneous routes. Incorrect landing

Will reduce all on no. To keep is weakened and to allow a motorcycle to work - best way to avoid unexpectedness and to customize the suspension.

Besides if you consider a motorcycle unpredictable - you SPI's and cultivate faithlessness in own forces


You can not apply contra-taxiing, if your hand are tight. Be off-the shelf. Be weakened. DG


 
Last changes 25.03.2004
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