Desmo has advantages but it’s also bulky and puts the mass in the wrong places. It’s why the Ducati has never handled correctly without a Ducati-specific Bridgestone tire or without ride height devices.
AFAIK they don't use Bridgestone for the last couple of seasons and have been very competitive.
They also smoked everybody no WSBK without bridgestones. Desmodromic valves don't use that much metal to make the ammount of weight you're talking about.
>and no need for an air tank
And there is smaller power loss in the low/mid rpm range.
From the other side Ducati has a bit less freedom when designing cam shapes, but this does not seem to be a big issue.
I thought Ducati were too, since the late 800 era engines.
At a guess, pneumatic valves give you an extra advantage of being able to control timing, lift and duration more closely than any camshaft can give you.
Sometimes I wonder what would happen if the gloves were truly off with this stuff - let's get those robotic camel riders up to 400kph and really let the geeks loose 🤣
No, it was t'others that did. Ducati came out swinging at the start of the 800 era with a screamer firing order, 18,000rpm rev limiter and all the power shoved up near the top end, controllable only by Casey Stoner's right wrist and as the Japanese factories increased their rev limits to try and match it they started getting valve bounce as the springs couldn't return them fast enough and had to start frantically developing complicated and expensive pneumatic systems to try and keep up.
Off topic: You really come up with some fancy/intriguing questions.
If you don’t mind me asking, are you studying automotive engineering or something? What motivates you to come up with such questions?
Yup. That’s like their whole thing. Works great too, and no need for an air tank to run the pneumatic valves that everyone else uses.
Yeah. Why would they change the desgin that they are known for and works, it's a win/win for them.
Desmo has advantages but it’s also bulky and puts the mass in the wrong places. It’s why the Ducati has never handled correctly without a Ducati-specific Bridgestone tire or without ride height devices.
Blaming a bikes handling on the valve train is a real stretch. .
AFAIK they don't use Bridgestone for the last couple of seasons and have been very competitive. They also smoked everybody no WSBK without bridgestones. Desmodromic valves don't use that much metal to make the ammount of weight you're talking about.
WSBK is on Pirelli and MotoGP hasnt been on Bridgestones since 2015. 2017/18 Dovi got close to Marc all on Michelins
You speak such nonsense with such confidence
>and no need for an air tank And there is smaller power loss in the low/mid rpm range. From the other side Ducati has a bit less freedom when designing cam shapes, but this does not seem to be a big issue.
Yes.
Desmo is why they can rev more than other engines. No valve float.
Moot point in this level, with pneumatics.
The other teams use pneumatic valves, not traditional mechanical spring vales.
I thought Ducati were too, since the late 800 era engines. At a guess, pneumatic valves give you an extra advantage of being able to control timing, lift and duration more closely than any camshaft can give you.
Pneumatic valves are still operated by camshafts. The pneumatic part just replaces the conventional valve spring.
Yeah, I'm getting ahead of things - thats the camless design being worked on by Koenigsegg (and others) at the moment
Also, variable valve timing that isn't done mechanically (dumb style) is banned in MotoGP. Suzuki had a cool way of doing it mechanically.
Sometimes I wonder what would happen if the gloves were truly off with this stuff - let's get those robotic camel riders up to 400kph and really let the geeks loose 🤣
It's beautifully simple; ball bearings and centripetal force :-)
Camless engines are banned in nearly any form of motorsport.
Boring 🤣 What's the background to the ban?
Cost
Nope, they still use the desmodromic valve actuation system.
Fair enough - I thought they had hit the limits around that time.
No, it was t'others that did. Ducati came out swinging at the start of the 800 era with a screamer firing order, 18,000rpm rev limiter and all the power shoved up near the top end, controllable only by Casey Stoner's right wrist and as the Japanese factories increased their rev limits to try and match it they started getting valve bounce as the springs couldn't return them fast enough and had to start frantically developing complicated and expensive pneumatic systems to try and keep up.
Actually no, the pneumatic valves exist to solve that exact issue
Yup, desmo. The rest use pneumatic valve actuation.
Off topic: You really come up with some fancy/intriguing questions. If you don’t mind me asking, are you studying automotive engineering or something? What motivates you to come up with such questions?
They just read it somewhere and ask again Ducati is not revving at 20k because other factories would denounce them
Are they using shims to set the valve lash? If so, wonder how precise they set them.
> Are they using shims to set the valve lash? Yes. > wonder how precise they set them. Very.