GearBox_Split_Range is DriveTrain.GearBox:
    .doc: """
    Gearbox for bulldozer model Caterpillar D10T.
    3 forward and 3 reverse gears with an additonal split range gear box, resulting in total of
    five gear steps in each direction.

    Caterpillar does not publish detailed gear ratio but rather a table of vehicle velocity at
    1800 RPM in each gear as shown below. Half gear steps are due to the split range gearbox.
    (https://www.cat.com/en_GB/products/new/equipment/dozers/large-dozers/115080.html)

        Gear:   Speed (km/h)
        F1.0     4.0
        F1.5     5.4
        F2.0     7.2
        F2.5     9.6
        F3.0    12.5

        R1.0     5.2
        R1.5     6.7
        R2.0     9.0
        R2.5    12.1
        R3.0    15.7

    Therefore suitable gear ratios have been calculated with these
    assumptions:
        Drive sprocket diameter:        739 mm
        Thickness of track shoe+chain:  200 mm
        Downstream gear ratios in drivline (i.e. bevel and final gear): 1:25

    """
    forward_gears: [3.86, 2.86, 2.15, 1.61, 1.24]
    reverse_gears: [2.99, 2.31, 1.72, 1.28, 0.98]
    initial_gear: 1
