pitlaneimmigrant wrote:autgyro wrote:I am confident that the speed of gearshifts shown from the F1 cars of today can also be equaled with a manualy operated dog box
Laugh? I nearly cried.
I suggest you learn how gearboxes work, it will give you little time for mirth.
Depending on how you define the gearshift (time to move the dog rings, or request-to-completion) an F1 gearshift take 50-150ms (on average), let´s see you match that.
No problem
And in an overlapped upshift the gearshift is effectively instant, the target gear takes drive off the current gear which then extracts before it gets collected by the overrun dogs. THAT is not humanly possible
If it is instant why do you quote the following?
The torque spike that would occur is managed either by an engine torque reduction or by slipping the clutch for a few milliseconds.
Also, (to other posters) don´t confuse F1 seamless shifting with dual clutch systems (aka DSC)
F1 boxes do alternate gears on different barrels and will momentarily have two gears in an engaged position (but only with drive on one, otherwise it gets messy), dual clutch systems also alternate gears, and have two gears in the engaged position but switch the torque transfer path by opening/closing clutches making the timing much easier.
It is you who is confusing other posters.
Neither types have two gears FULLY engaged, they both use shift components that use a range of 'partial' engagement. They have to, the shift components are not strong enough to transfer full prime mover torque when their geometry is changing through the shift overlap.
As mentioned earlier in the thread this system was in use in F1 for a couple of seasons before the current generation of gearboxes came around.
The first semi/ auto shift gearbox in F1 was in Mansels Ferrari.
I was a consultant on the project.