Motor Cross Honda CRF450R 2011

Gambar Wallpaper Motor Cross Honda Terbaru CRF450R 2011

Long admired as the bike of best in the big-bore motocross division, the 2011 CRF450R incorporates improvements that will advice this bike absorb its arch standing. The biggy powerband is now akin stronger acknowledgment to added low-end cull and midrange antithesis forth with added burke acknowledgment via a new burke body. Revised abeyance bond and settings crop bigger control, added ride plushness and added rear-wheel traction. A new Honda Progressive Steering Damper (HPSD) produces akin bigger tracking ancestry than before, and a new muffler meets the 94-decibel complete akin appropriate by some antagonism organizations in 2011. All this and added accomplish the 2011 CRF450R a affirmation to advance its ascendant role amid open-class MX bikes.

Motocross is a battle, and you’d bigger accompany your “A” bold whenever you appearance up—either that, or be able to eat a bucketful of roost. But back you’re on a 2011 Honda CRF450R it’s anybody abaft you who’ll be savoring that dirt-flavored banquet. Why? Because we’ve accustomed the CRF450R some austere upgrades.

First, the 450 gets a new burke body, new ammunition injector, and new ECU mapping so the agent makes added low end and midrange torque, and additionally offers akin bigger burke response. The ability is easier to control, but after any accident of top end—better than anytime for average and able riders alike. And our anatomy designers were aloof as busy, afterlight the CRF450R subframe and demography the befalling to fine-tune the subframe's stiffness. A new rear shock articulation and lower shock arise for bigger front/rear antithesis and bigger abeyance activity abnormally over square-edged bumps.

And finally, new 2011 AMA rules accompaniment that every MX bike will accept to accommodated the new 94 decibel rule. Both our CRF450R and CRF250R do that easily, acknowledgment to a new bankrupt arrangement that works in affiliation with the new FI settings. So while the added guys ability aloof change a muffler, that’s aloof area we started. And the aboriginal time the aboideau drops, it’s gonna show.

2011 Kawasaki KFX450R USA Editions

2011 Kawasaki KFX450R USA Editions Picture

Sharing agent DNA with the awful acclaimed KX™450F motocrosser, the KFX450R is attainable to race. Equipped with titanium valves to accumulate reciprocating weight low, the agent is adapted with a awful acknowledging 32-bit agenda ammunition bang (DFI®) arrangement that automatically compensates for temperature or altitude. DFI enhances the KFX450R’s adeptness to construe its four-stroke ability into outstanding thrust, with calmly attainable torque in the low- and medium-rpm ranges.

The fast and reliable KFX450R additionally includes a failing about-face accessory arrangement chip with its five-speed chiral transmission. The KFX450R’s about-face accessory allows riders to bound and calmly extricate themselves from aboriginal about-face chaos, aisle bottlenecks or any added on-track incident, application the accustomed about-face lever, additional a acceptable handlebar army lock-out lever.

Unique Bikes Modifications Picture

Unique Bikes Modifications Picture

Unique Bikes Modifications Picture

Unique Bikes Modifications Picture

Unique Bikes Modifications Picture

SUPERMOTO KTM 690 SMC 2010

Razor-sharp Supermoto technology, in aggregate with advanced agent technology – the arrive 660 SMC has begin a added than aces almsman in the 690 SMC. KTM has created an incomparable bike based on the new 690 Enduro that will alive up to the toughest Supermoto demands and leave anybody abroad abaft in added means than one. Suitable for accustomed riding, abounding performance, arresting appearance, 100?% “Ready to Race”!

KTM 990 Super Duke R

The 990 Super Duke R has to be the hottest bike accessible bogus in series. In this case, the KTM engineers did their absolute to advance a “machine” that would accomplishment to the fullest every aftermost inch of elbowroom in alley cartage certification: Fully adjustable 48 WP forks, ultralight mono-seat appendage section, chromium molybdenum tubular filigree anatomy belief a bald 9 kg as able-bodied as an added council damper for acute ambit times. Out of the rut and into the race.

Backflip Calculation (again)

I've had a lot of folks ask me about the parts of my FMX backflip calculation that I claimed were too hard to show in Blogspot. Specifically they want to know about the part where I figured out that half the energy goes into rotating and half goes into upward motion, when someone is trying to cram in the most flips.

Rather than send it out one at a time, I've made some jpegs out of my notes. If you actually LIKE doing physics homework, you might enjoy these. Also, if you see an error, please let me know so I can fix it before the calculus police catch me.

-Buzz

Freestyle Motocross Backflip Limit

Freestyle Motocross superstar Travis Pastrana hails from Annapolis, MD. That's just down the road from my home town. Besides the fact that FMX is simply cool, having one of the most famous competitors based so nearby means that my son can't help but love watching the competitions (OK, I'll admit it, I like them too).

One day as we were watching Travis throw down backflips and double backflips on Fuel TV, it made me wonder just how many flips were at least theoretically possible. Well I finally got around to doing the calculations.

I'm not going to keep you in suspense - according to my caculations (I love saying that) the most backflips that a person could possibly do on an FMX bike seems to be 4.

This may be hard to believe, considering that nobody has managed more than a double backflip yet. In case you're wondering how I figured it out, read on for a brief sketch. If you don't really care about the physics, you can still rest assured that FMX has some room to progress, at least in the backflip department.

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FMX Backflip Calculation

The first thing to consider in calculating the maximum number of backflips in FMX is that there is a limited amount of energy available. You can estimate the maximum amount of energy from the record FMX step up height (the equivalent of high jumping on FMX bikes), which currently stands at about 11 meters.

The energy necessary to lift a bike and rider 11 meters off the ground is

E=m g h= 16500 joules

where m is the total mass of the bike plus rider, which I estimated to be 150 kilograms

g is the acceleration of gravity, or 9.8 meters per second squared

and h is the height

When a rider flips, some of the energy that they would have used to achieve height is put instead into the energy of their rotation. Optimally, the energy should be split equally between the upward motion and the rotation. I can prove this, but it requires a little bit of calculus, which is hard to show in the rudimentary editor that Blogger provides. But it seems pretty sensible, if you think about it.

If anyone wants to know the details, drop me an email and I'll explain it. For now, you'll have to take it on faith.

Once you know the amount of energy that goes into getting altitude (16500/2 joules), you can figure out how high they fly during a max backflip attempt and how long they are in the air during a jump. Because they’re diverting half the total energy into spinning, and half of the total energy to getting height, they should only travel about half as high as in a record setting step up competition, or 5.5 meters (18 feet) off the ground.

To figure out how long the whole trip takes, you have to use the equation

h=1/2(g * t^2)

where ^2 means time (t) is squared.

This is the equation for how far something would travel (h) under constant acceleration (in this case, the acceleration due to gravity g) in a certain amount of time (t).

Because we know h and g, but not t, you have to rearrange this equation to find out how long it takes to go from the ground to a height h.

t=(2*h/g)^1/2

(^1/2 means the square root of (2*h/g))

But don't forget that the rider has to come back down as well, so the round trip is twice as long as it takes to get to h.

You can also calculate how fast they are rotating by using the equation for rotational energy.

E=1/2(I * w^2)

Where E again is 16500/2 joules, I is the rotational moment of intertia, and w is the rotational speed.

A little mathematical manipulation leads to the equation

total rotations (in radians) = w*t =(v^2/g)(m/I)^1/2

I also guessed that the bike and rider's rotational inertia (I) is about 150 kilogram meters squared. It's a reasonable estimate, and I can explain it to the very curious folks, but it doesn't make much difference in the final calculation (because we're taking the square root of I).

If you plug in the numbers, you find that an FMX rider could theoretically rotate through no more than about 22 radians. Radians are the measure of rotation in the units I'm using (SI).

There are 2*pi radians in a circle, so in other words they will do 3.5 full rotations, which corresponds to a quad backflip.

Here's how 3.5 rotations equals 4 flips in FMX.

In performing a single flip - the rider leaves the hill with their front tire pointing toward the sky and comes down with it pointed to the ground. Here's a video to prove it



That means the bike and rider actually rotate only a little more than halfway around when doing a single backflip. For every additional backflip, they add another full rotation. So, 3.5 rotations is the same as a quad-backflip.

There you have it. Based on data from the record setting step up competition, we can expect, someday, to see a very daring and talented FMX rider to pull of a quad backflip, but never any more (unless they try it on a much more powerful bike).