Would you give up your Thou' for an 800cc MotoGP rep?

[sAsLEX]

It seems unplausible, but there have been tests done, and indeed some of the sportier cruisers can outbrake some sportsbikes. We're talking metres here though, the difference isn't significant. As much as anything, what it shows is that the sportsbikes are being held back by tyre technology, rather than the cruisers wheelbase being particularly good brakers. imho. That's why I mentioned road tyres, as opposed to slicks. Having said that though... redoing the tests with the sportsbikes on top of the line road tyres instead of their oem tyres (iirc the mag that did the test had the bikes in oem condition), would see the sportsbikes back on top. Even that statement is loaded though... back on top makes it sounds like they were far behind the cruisers... they weren't.

And I don't think tires are ever going to up the braking capacity of a bike that far. An F1 car outbrakes a bike, or most cars for that matter, without even going near the brakes lifting off pulling over 1g of decel.

What bikes need is a dynamic fairing, think Veyron and its wing, that smooths and covers the rider down the straight, turns into a airbrake/wing at the end and just gets out of the way for the corners......... hmmmmm

[imdying]

Tyres are everything. If you were to design a bike, tyres are where you'd start. Another good reason for going to 800s I guess... eventually the thous will get to 200rwhp... what would a tyre that can handle that weigh?

Prodrive (the guys that did the Subaru 555 rally cars) have experimented with active fairing panels, google for it, it's probably on the web somewhere.

[sAsLEX]

Tyres are everything.

Ah but they are never going to beat physics. Without a down force, you are only ever going to get weight pushing down against the tarmac. A tire is going to assist in the amount of traction that can be harnessed for a specific force, but there are limits to general tire adhesion. About 1g at a guess as this is around max accel. for a bike and also cornering force for non aero cars.

[cowpoos]

And I don't think tires are ever going to up the braking capacity of a bike that far. An F1 car outbrakes a bike, or most cars for that matter, without even going near the brakes lifting off pulling over 1g of decel.

What bikes need is a dynamic fairing, think Veyron and its wing, that smooths and covers the rider down the straight, turns into a airbrake/wing at the end and just gets out of the way for the corners......... hmmmmm

you mean like a rider sitting up while braking???

and tyres make a stuff load of differnce...race tyres are alot grippier that road rubber...once warm...and suspension and geometry has alot to do with it also..the rider has a big part to play...his body position can knock serious metres of braking!!

[imdying]

Perhaps tyre technology will evolve into active tyres that deform to increase their contact patch. Don't take up engineering as an occupation, you've no imagination.

[cowpoos]

Ah but they are never going to beat physics. Without a down force, you are only ever going to get weight pushing down against the tarmac. A tire is going to assist in the amount of traction that can be harnessed for a specific force, but there are limits to general tire adhesion. About 1g at a guess as this is around max accel. for a bike and also cornering force for non aero cars.

cars stop quicker because of the contact patch...pure and simple!!

[cowpoos]

eventually the thous will get to 200rwhp... what would a tyre that can handle that weigh?
.

probally less than the one on your bike...I have one on the back of mine..

[cowpoos]

Perhaps tyre technology will evolve into active tyres that deform to increase their contact patch. Don't take up engineering as an occupation, you've no imagination.

tyres do that anyway on bikes!!

[imdying]

probally less than the one on your bike...I have one on the back of mine..

I was thinking more with oem longevity requirements in mind

[imdying]

tyres do that anyway on bikes!!

They surely do Not actively controlled yet though, that'll be cool.

[cowpoos]

I was thinking more with oem longevity requirements in mind

lol...I knew what you ment mate...was just a stirring coment...

But pirreli super corsa pro's [the new generation tyres] are proving to have good longevity in road racing world wide...on the superbikes even...and think how much shit those tyres are dished up...and these are road legal tyres

[imdying]

Yeah I know The engineer crack was a troll do You're an engineer right saslex?

[sAsLEX]

Don't take up engineering as an occupation, you've no imagination.

snap too late.

I just see other areas as being able to provide more improvement. And since I didn't do chemical and materials I was more looking at things I could possibly tinker with.



And Cowpoos I do realise this is why you sit up at the end of the straight. Wrong placement of elbows is equivalent to 20HP in the search for speed, hence why Caparossi was rather a bit quicker on his duke when it first came out compared to his team mate, his crouch was better.

[sAsLEX]

This is obviously the solution to the braking problem.....

[slowpoke]

I don't think a cruiser could out brake a mofern sports bike....infact I don't think it would have a shit show!!

Yeah, I thought the same bro but I read a test that showed a reasonably lightweight cruiser can outbrake a sportsbike.
The steep steering geometry and weight forward bias of sportsbikes makes them stoppie prone where a cruiser with it's low centre of gravity and shallower steering rake will tend to plough/slide the front end rather than lift the rear. This meant they could get on both brakes (rear useless on a sportsbike with rear wheel in air) harder without being limited by the bike wanting to flip and plant the rider like a fence post.
I can't even remember which cruisers it was now, and it was only a couple out of about 20 odd that excelled, with not a lot of real difference in it.
Obviously the things that help it brake also make the cruiser crap at corners. The tests were also based on one off efforts without repeated hard braking.
Obviously if the cruiser weighs 300kg's then it's got shit show of pulling up as well as a 170kg sportsbike.