Was it?autogyro wrote: The reason for an increase to 8 gears in 2014 is solely to make it easier to control the powertrain for energy recovery in the dynamic environment forced by excessive downforce.
Another major change to the powertrain rules for 2014 is the gearbox specification, which will now feature a set selection of gear ratios for the entire season for each driver. Currently, teams are allowed to change gear ratios between races in order to optimise its set-up for each track, but the same ratios will have to be used at every track from 2014, including such extremities as Monaco and Monza.
The restriction was requested by the teams who are eyeing yet another cost saving from the initiative. It has been made possible by adding an eighth gear to the gearbox and by the fuel flow limit of 100 kg/hour on engines in the upper third of the its rev range. As a result Sam Michael says it won't be that big a challenge to balance gearbox performance between all the different tracks.
we know revs, and rear tire height, but how could you figure top gear ratio if you don't know the final drive ratio? (or vice versa)Lycoming wrote:if you look at the onboard footage from f1.com, its not hard to extract shift points from the overlay. From then, its a set of linear equations from which you can determine final drive and individual gear ratio and gear spacing.
If you compare the potential cost savings in this further stagnation of gearbox development with the amount spent on irelevent downforce aerodynamic development, it is a tiny fraction saved against a fortune being spent by the bigger teams.machin wrote:Was it?autogyro wrote: The reason for an increase to 8 gears in 2014 is solely to make it easier to control the powertrain for energy recovery in the dynamic environment forced by excessive downforce.
http://www.manipef1.com/news/articles/12711/
Another major change to the powertrain rules for 2014 is the gearbox specification, which will now feature a set selection of gear ratios for the entire season for each driver. Currently, teams are allowed to change gear ratios between races in order to optimise its set-up for each track, but the same ratios will have to be used at every track from 2014, including such extremities as Monaco and Monza.
The restriction was requested by the teams who are eyeing yet another cost saving from the initiative. It has been made possible by adding an eighth gear to the gearbox and by the fuel flow limit of 100 kg/hour on engines in the upper third of the its rev range. As a result Sam Michael says it won't be that big a challenge to balance gearbox performance between all the different tracks.
Totaly artificial and still using a layshaft stepped ratio geartrain, exactly the same as in the first cars ever built.raymondu999 wrote:Don't forget it's not just about an 8 speed gearbox - but about ratios that have been locked in from the start of the year. I think they're allowed 1 or 2 joker changes though?
Hewland publish their standard ratios for their F3 gearbox on their website... they go down to a 0.89 ratio.... ok, so its not an F1 box.... but I assume the same design considerations go into both designs, i.e both want to be as small, lightweight and efficient as possible... its just that one is playing with 750bhp and the other 200bhp! My guess is that an F1 box would probably use a slight overdrive too where the car's top speeds demand it....drivinhard wrote:we know revs, and rear tire height, but how could you figure top gear ratio if you don't know the final drive ratio? (or vice versa)
I get figuring the spacing between them, based on rev data
Any benefit as far as transmission efficiency to gear with an overdrive ratio?machin wrote:F1 box would probably use a slight overdrive too where the car's top speeds demand it....
