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Main > Manuals > The book about piloting sportbikes > The Chapter 2. The control of gas - corrected number one
 

The Chapter 2. The control of gas - corrected number one

Probably l and to be disaccustomed to such SPI, how attachment / sea disposal of gas? What descends to bank as a result of this widespread error? What design features of a motorcycle are in an inconsistency with it SPI? What will allow to be saved of it? What the driver learnt to struggle with it SPI benefits? The answers to these problems you will find in following five chapters.

Understand gas

Control of gas - very thin piece, with the rules and standards. The ways of control of gas are in direct relation to design features yours bike and allow him to act maximum effectively. Realization of design features bike and their interplay with a fashion of driving - first step in strife with SPI's, hindering to the driver.

Coupling with a road

At transit of turns main, about what the racer, this coupling of trunks with a road cloth cares. Let's consider of a spot contacts and ground it we shall understand, what ideal weight in turn. On rough calculations, 40 percents of weight should is necessary on a forward sprocket and 60 % - on back. For racing motorcycles on a back sprocket it is necessary up to 70 % of weight, as they test large accelerations. Depending on concrete model of a motorcycle, the ratio 40/60 can a little vary. A problem of the driver to support ideal weight with the help of masterly usage of gas. How it to achieve?

Mild contact

Weight of the majority of vehicles in a static's or at straight-line uniform motion makes 50/50 (+ - 5 %). Thus, we need to displace from 10 up to 20 percents of weight in front back. Means, it is necessary to give a motorcycle acceleration from 0,1 up to 0,2 g. For this purpose it is necessary to increase revolutions with 4000 up to 6000 on a footstep to transfer (speech goes about vehicles not below than 600 cc). Not too strong acceleration but it it is enough.

Often driver can not precisely trace, as far as he augments revolutions, and, as a rule, he makes an error in the smaller party. In outcome the motorcycle or straightens a pathway in turn, or the sideslip starts, and here driver commits one more error - throttle backs.

Corrected number ONE

As soon as you have begun to add gas, you should add it, uniformly, continuously and permanently down to termination turn.

As soon as racer has reached ideal weight (i.e. has displaced 10 % 20 % of weight in front back) any changes weight result in deterioration of coupling with a road. As soon as bike is inclined for turn, any changes weight - whether simultaneous (for example, on a fracture of a road, which one influences at once both sprockets) or serial (at discovering / closing of gas, of weight forward / weight back) change ideal weight of a bus system a /motorcycle.

Driver's skill

For successful usage of a rule ¹1, the driver should perceive and feel needs of a motorcycle. The driver does not enrich bike, he simply helps him to work correctly. Apparently, that any delay, handicap, the discovering / closing of gas complicate achievement of an ideal. In it and the main harm SPI ¹1 - it immediately degrades coupling bike with a road. Than faster you go, the more strongly effect. Achievement and maintenance weight 40/60 - main purpose of all your operating with the handle of gas. The rule of gas ¹1 struggles with SPI ¹1.

Losses

Even if you will not break the tank in drift as a result of incorrect usage of gas in turn, you will waste time. In medium-rate turns (40-80 miles / hours) each attachment / ñáðîñ/äîáàâëåíèå of gas costs to you 0,1 with (or length bike if to speak about a distance), if you the good racer. For all remaining this loss it is even more. In high-velocity turns the penalty on time is augmented, as the air resistance introduces the greater contribution to deboosting a motorcycle.

Courses of survival

SPI ¹1 - most important SPI. The street driving is frequently tolerant to SPI ¹1. For the driver the error submission is reshaped, that it is possible to afford to throttle back in turn. However, it is necessary legiblly to perceive, that the rule ¹1 works almost always, on any speed, it correctly for 99 % of all turns and road conditions. The exceptions are rare - lengthy descents, turns with decreasing radius, turns with a negative structure (velotrack to the contrary) and turns with an irregularity in the middle. But even then you do not occlude gas, it is simple on time cease it to add.

GAS!

So, similar, aged rule of the racers " Doubt? Gas! " Has the right to existence.

Vivid example - incident with Dug Chandler on Sears Point Raceway in 1989. He then piloted the 750-bottom supersports on a dry route. His back tyre was so worn, that was broken in drift simplly from throttling back. In any moment the back sprocket began to record so, that it has kept 30-f a -foot track of gum on mineral pitch of a route. If Dug has throttle backed - hightside to not avoid. But the experience motocrossmen has suggested him, that is necessary gas. Dug has added of gas, it has resulted to wobbling, but eventually motorcycle has levelled off, of Arcs has remained in a saddle and on the maiden place. The attachment of gas was the alone solution. And what you would make?

Monitoring problems

  1. What such SPI ¹1?
  2. What such exact activity by gas?
  3. She corresponds to design features of a motorcycle?
  4. How often your right hand occludes gas without the sanction?

As for each bike the features, it is important to learn to feel its behavior in turn. This chapter will help to you to learn exact weight. Sometimes it would be desirable to turn off on full, and me too, that of a sin to conceal, but benefits the one who follows advices of this book. You see SPI ¹1 costs to you not simply of time on a circle, can there is a place in peleton. DG


 
Last changes 25.03.2004
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