[Ducati] 17000 RPM MotoGP Limit?

[Bob Marren]

Jim Calandro wrote:
> There is a pump that must maintain the pressure to operate the 
> pneumatic valves.  I wonder if that is an additional load on the 
> motors  I have not studied pneumatic motors to see how they operate so 
> cannot guess any better than that.  Other wise I would expect that 
> they would be very low friction and certainly low mass to achieve the 
> rpm they do in cars.
>
> I think the point was the smaller the motor the more the advantage the 
> desmo system produces so the F1 motors would be going in the wrong 
> direction if that theory was correct.  Not sure what the individual 
> piston in F1 displaces but I think it is greater than 200 cc.
>
> I have read some where that Ducati gave emphasis to design of the bike 
> for top speed where Honda gave emphasis on the ability to turn the 
> bike.  At high speeds aerodynamics plays a very big role so that would 
> make sense from what you see at the track.
>
> Jim
>
> Jim Calandro
> il Capo
> US DESMO
> www.usdesmo.com
> 704-843-0429
> ----- Original Message ----- From: "Tony Pagliaroli" <ajpags at gmail.com>
> To: "Ducati Owners Group" <ducati at ducati.net>
> Sent: Tuesday, March 11, 2008 4:41 PM
> Subject: Re: [Ducati] 17000 RPM MotoGP Limit?
>
>
>> So I'm not sure I understand how the pneumatic motors have additional
>> friction to operate valves over desmo.  Also, unless there's some rule
>> scenario that specifically prohibits this technology, I can't imagine
>> why F1 wouldn't adopt it at any displacement if what you're saying is
>> true.  Being naive about pneumatic motors, could you enlighten me?
>>
>> Now perhaps the Desmo system has the upper hand at the moment, and the
>> Japanese factories are behind in their pneumatic development right
>> now.  That much I can buy at this point.  Ducati hasn't had to develop
>> a new valve train, so they clearly have the upper hand in this one.
>> If your statements are correct, they'll always have it, and if not, we
>> may see the pneumatic valved motors being the norm at the front soon.
>> Time will tell I guess.
>>
>> Also, do we have any real verification that HP alone is what's causing
>> the higher trap speeds?  I mean drive (meaning the ability to get that
>> power to the ground electronically or otherwise) and aerodynamics are
>> contributing factors, and every bit as important as the outright HP
>> number, no?
>>
>> Pags
>>
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>
>
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F1 cars and Moto GP bikes with pneumatic springs use a nitrogen cylinder 
for the pressure.
 No parasitic losses and large enough for the race. Camless engines are 
just around the corner
but will need a hydraulic pump to supply the 100 PSI to open and close 
the valves. Many
profiles can be stored in the ECU to match most conditions.So I guess we 
have not seen
the best yet of internal combustion engines.
 Bob