Motogp Game Download For Pc Highly Compressed
Sabina Kehler
I hear a lot of people talking about lowering your center of gravity when going around corners. Yes, lower center of gravity helps you turn faster, but higher center of gravity gets you around the corner with less lean angle. I see a lot of people confusing getting down and low with leaning off. Many people would be better off with higher bars, so that they can sit up more when going around corners, keep their center of gravity higher, and reduce their lean angle.
I agree! This is why I prefer my naked bikes and the higher bar! During my last session with CSS in Class 4 at VIR, Cobie helped me so much. He told me that instead of my flopping all over the bike(which was scaring the hell out of him!) before I got into the turn, to stay more on top of the bike. He said it would decrease my lap times and it did! Cobie got me to work at stopping my flopping all over the side of the bike and going into the turns too fast.
His words of wisdom were to set up before the turn, by staying planted more on the seat and go "In slow and out fast!". By Golly if my lap times didn't improve and I started having more fun! I finally saw Da Light!
I've been wondering about this too. It appears to me that riders are perched up real high on Superbikes and such. The seat looks to be level with the handlebars and the pegs are, lokks to me to be, about 4 inches higher than production bikes. I think the gas tanks are shorter but is the seat higher or are the bars shorter. I think overall the bikes are lower meaning the whole bike but, in conjunction with the wheels is the seat higher. I'd like to compare the geometry specs with stock specs. Vedy Vedy intedesting!
Superdave88: Superbikes have more or less regular seat and bar heights, as they have to be homologations of the road bikes they are based on. that said, GP bikes are very much the same heights, therefore proving the manufacturers have it right for supersports bikes.
Footpegs are raised from standard road position for track racing on all but the strictest one make racing series. This is to increase available ground clearance when leaning the bike over on the track. Regular supersports road machines are built slightly lower for comfort on long runs and for Joe Public. If you have ever sat on a real race bike or a road bike modified as such, you'll get leg ache after an hour. Footpegs do assist in using the whole body as a steering lever, but I think that's too technical for this question and a bit off subject.
The idea of a lower centre of gravity providing quicker turning is true, you can't beat it. It is a basic lever effect. (Lesson in physics there!) If you are really on the pace on a track day and the bike is being riding to within a millimeter of loosing traction completely, then you need as low a centre of gravity in corners as possible, to reduce stresses on your tyres. Hanging from the inside of the bike helps to get you body weight lower and (more importantly) closer to the centre of radius of the turn. This really does help, trust me! For example, go to an Ice Rink somewhere and watch some pro Speed Skaters. Watch their body stance in the corners. They lean so far over that they drag their inside hand on the ice. (to gauge their lean angle, much the same as sticking your kneeout on the track) In comparrison to bikes, they could try leaning the blades but no leaning with their bodies. I can assure you they would have to go alot slower to stay upright. They lean their bodies right over to get a lower centre of gravity and to get the majority of their weight closer to the inside of the turn, to allow gravity to slightly assist in getting them round the corner quicker. The same rules apply for bikes. Why do you think a MotoGP star has never tried sitting up more or using upright bars during a race in modern history?
Having higher bars and staying more upright (keeping a higher centre of gravity) in the corners will give you much more confidence in the twisties, I won't deny that. I used to ride a Honda Hornet CB600 and it was very reasuring. I found it to be the same on a Yamaha FZ600 Fazer. This is because you have a wider bar to lever the front wheel with, giving you easier control over steering. The high position keeps you further from the floor, assisting with nerves and the natural desire to stay alive.
Waynedunham: I believe, from what you have said below, that you were slightly un-nerving your instructor with your hanging off style, possibly not something you do naturally on the street? Basically, by telling you to stay more upright and focus on the corners and set up (in slow out fast), you lost several seconds per lap. You learnt something very important there - Keep it simple! By cutting out all the effort and work of hanging off and trying to sort everything else out as you approach a corner, you were able to focus all your thoughts and feelings on the deceleration, down shifting and cornering itself, therefore becoming much more relaxed on the bike. This helped you get round quicker.
Now, enter Mr Valentino Rossi on your bike at the CSS. He hangs off on every corner. Assuming he has set a few control laps at speed, you tell him to stop hanging off and keep himself mostly centred around the seat and try to keep his lap times the same. Imagine what would happen. He would probably be seen braking very harsh into corners, back wheel sliding and bobbing off the floor every where. He would be seen carrying huge amounts of lean angle into and through corners and getting so hard on the gas that the bike would be spinning up everywhere. His lap times would also be slower, "for sure"! Racing has proven that lower, shorter bars provide better front end loading, better aerodynamics and better riding position. (for racing at least). The relatively high seats (in comparrision to the bars) assist in getting weight over the front and allow the rider better feel for what the rear tyre is doing. The high footpegs are for ground clearance more than anything. Racers hang off for a lower centre of gravity. Proven fact I'm afriad!
Just as a quick sum up: Everyone rides differently. High bars and higher centre of gravity makes cornering better and quicker for some (less to think about) but not for others. I personally get a feeling of running wide and imminent death if I don't hang off my bikes. Racing has proved that when really pushing a bike and tyres to the limits, hanging off and lowering the centre of gravity, as well as low bars and high footpegs is definitely the way to go for faster lap times. One last fly to throw into the ointment - Supermoto bikes! I recently watched them compete on the track against Aprilia RSV1000's, CBR600RR's and a ZX10R Kawasaki. The Supermoto's were right at the front and came first and third. The riders of the supermotos stayed upright in the seat and leant off the wrong way whilst the supersports riders hung off. Does this mean they have it right or does it mean they have different machines which require different riding styles? You see, this is an endless debate if you are not considering different styles of bikes. Not neccessarily saying anyone in here was, I just decided to go for it on this one and write down all my feelings, with some of the more complex Physics left out. lol
I have observed that some instructors do not hang off as much but I believe it is because they are not going at a pace where they "need" to hang off more. Where you or I may believe we are going fast and just barely keeping it on the track, they are typically not working up a sweat to keep up with us (well at least me). If you have the opportunity to see them light it up like I did at CodeRACE two years ago - you will see that they all can and DO hang off at those speeds.
The height of CofG makes no difference at all to the lean angle required to get through the turn, assuming the speed and line remain the same. Lowering the CofG on a motorcycle makes it easier to turn quickly by reducing the moment arm from the CofG to the contact patches. Kind of the same thing manufacturers talk about with regard to mass centralization; the closer all the mass is to the roll axis, the more easily you can turn the bike.
I find myself thinking of a figure skater spinning in place with their arms extended. What happens when the arms are brought closer to the body? The skater spins faster. Hmmm. However, in this picture, the skater is ALREADY spinning when the arms are brought in. (inertia/angular momentum, etc) Where are the arms when the skater INITIATES the spin? Are they extended? Are they extended more before a spinning jump that requires more effort?
If one is travelling perpendicular to a gravity field, what happens to 'weight'? When you run, do you feel lighter? In addition, considering gyroscopic action, how much does a bike at speed really 'fall'?
1)High CofG will help a bike turn quicker as explained in the quote above. A good example of this is the changes made to the '06 ZX10R. Kawasaki wanted to make the bike turn in faster, so the raised up the engine in the frame to raise the CofG. When you turn a bike you basically steer the wheels out from under it and it falls over, the higher the CofG, the longer the lever gravity has, the quicker the bike falls. So I think I had this part right before.
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