11-03-2023, 02:56 PM
(11-02-2023, 04:39 PM)ac3r Wrote: And unless the Flexity Freedom's are even worse than we thought, surely they could take those actual tight turns to get across Hayward much faster than they do. I've been on plenty of trains, trams and streetcars that can make similarly tight turns a bit faster.
This is another thing done by equations.
rₘ = (G * s²)/(g * (C + D))
rₘ is minimum radius of curve
G track gauge in mm
s is speed of train in m/s
g is the gravitational constant 9.81 m/s
C is the cant of the rails in mm
D is the cant deficiency expressed in mm
Cant deficiency is essentially how hard the train pushes toward the outside rail on a curve. https://en.m.wikipedia.org/wiki/Cant_deficiency
It doesn't seem to me like ION tracks were laid with any cant on curves like from Charles onto Borden. It feels like minimal centrifugal force outwards. It looks like about a 35m radius, so a small cant deficiency of 50mm gives us a max speed of about 12km/h around it. Cant deficiency cannot be higher, or you'd feel more centrifugal force as a passenger.
If you get an app that tracks your speed with GPS, the trams go about 10km/h around the Borden and Hayward corners.
Unless the trams you were on had a cant in their rails, they likely were not going any faster around similar sized corners.