matt21 wrote:They are changing the gear-pairs. Otherwise you would need a CVT, which is forbidden.
riff_raff wrote:matt21 wrote:They are changing the gear-pairs. Otherwise you would need a CVT, which is forbidden.
Just a minor point, but it is possible that only one gear in the mesh must be changed. It is possible to design two interchangeable involute spur gears which have slightly different numbers of teeth (for example 30T and 31T) that will both mesh with a common mating gear mounted on the same shafts. Changing one gear by a single tooth count gives a much finer selection of ratios than changing both gears.
9.6.2 The maximum number of numerical change gear ratio pairs a competitor has available to him during a Championship season is 30. All such gear ratio pairs must be declared to the FIA technical delegate at or before the first Event of the Championship.
28.6.d) At each Event seals may be broken once, under supervision and at any time prior to the second day
of practice, for the sole purpose of changing gear ratios and dog rings (excluding final drives or reduction gears). Competitors must inform the FIA technical delegate which ratios they intend to fit no later than two hours after the end of P2. However, one additional change of ratios and dog rings will be permitted if a gearbox change is necessary on the first day of practice before the end of P2. Gear ratios and dog rings (excluding final drives or reduction gears) may also be changed under supervision for others of identical specification at any time during an Event provided the FIA technical delegate is satisfied there is evident physical damage to the parts in question and that such changes are not being carried out on a systematic basis.
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