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#11 | |
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Motorcycle.com Staff
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Quote:
As for a smaller version, Ducati staff were naturally tight-lipped. The most I could get out of them is that they're thinking about one and if it is a good idea in this current economy. Keep in mind that it costs nearly as much to build an 848 as it does an 1198 - smaller pistons aren't much cheaper! So, I'm convinced an 849 version will be seen in a couple of years. There's too much development cost in the Panigale not to spread it into another model. Yep, there ain't much glory in being hunched over a computer for 8,, 10, 12 hours a day, nor in the 31 hours of travel time it took to return home from the Middle East, but this trip was a highly memorable one. As an F1 fan, I was amazed when Yas Marina was first shown to the public. It's otherworldly spectacular. It was a terrific day at work! ![]() Part of the facility includes the Ferrari World theme park with the Formula Rossa roller coaster that accelerates from 0-150 mph in just 4.9 secs with a peak G-force of 4.8! That, too, was memorable! Check this video to see how even a two-time F1 champ can look nervous while riding it: Fernando Alonso and Felipe Massa on Formula Rossa at Ferrari World Abu Dhabi - YouTube
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"The trouble with the world is that the Stupid are c0cksure and the Intelligent are full of doubt." -Bertrand Russell |
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#12 | |
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Founding Member
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Quote:
I love the way Alonso was turning his head and keeping the horizon horizontal on the steep banking. He doesn't seem to be unfamiliar with the high-g environment. What drives the launch? Obviously not a gravity-powered ride. |
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#13 | |
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Registered Member
Join Date: Mar 2011
Location: West Bloomfield Township, Michigan
Posts: 8
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Quote:
We note that none of the world's 2-wheeler OEM's except Ducati, uses Desmodromic valves. So I wonder if Ducati uses this valve opening and closing arrangement as a selling point (i.e. a "gimmick" if you want to be negative about it), like Chrysler with their utilization of hemispherical combustion chamber engines for their high-performance 4-wheelers. |
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#14 | |
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Motorcycle.com Staff
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Quote:
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"The trouble with the world is that the Stupid are c0cksure and the Intelligent are full of doubt." -Bertrand Russell |
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#15 | |
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Founding Member
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Formula 1 cars use pneumatic valves I believe which is not really feasible on a bike currently. Desmo valves require more maintenance which the Japanese are unwilling to do considering they have to compete so much more on price. Of course, now with the trellis frame gone, this is the last bit of Ducati heritage along with the L Twin of course. |
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#16 | |
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Motorcycle.com Staff
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Quote:
But then came MotoGP bikes that operated at much higher revs, so it was only natural Ducati used the desmo system on their bikes. An unforeseen side benefit of desmo valves in MotoGP is that they seem to be slightly better in fuel economy, a real concern for the class that limits the amount of fuel a bike can carry.
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"The trouble with the world is that the Stupid are c0cksure and the Intelligent are full of doubt." -Bertrand Russell |
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#17 |
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Motorcycle.com Staff
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Yep, and yep.
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"The trouble with the world is that the Stupid are c0cksure and the Intelligent are full of doubt." -Bertrand Russell |
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#18 |
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Adding to the reasons for desmodromic valves:
When World Superbike began in 1988, Ducati was competing with an 851cc twin against 750cc fours. To make equal horsepower they had to move equal air and fuel per minute through half as many (though bigger) valves. And that required lots of revs, compared to their previous engines. Because valve mass increases as the cube of diameter (twice as big, 8 times heavier), they had a much more difficult valve spring problem to solve than the fours. So desmo--with which they had lots of experience--was probably a more conservative and less costly solution than state-of-the-art spring metallurgy. Last edited by DataDan : 02-21-2012 at 01:43 PM. |
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#19 | |
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That's nitpicking now isn't it? |
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#20 |
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Motorcycle.com Staff
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Nah, more info is good! DataDan is a smarty pants!
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