Railway Curve app for iPhone and iPad

"Railway Curve" is an application dedicated to railway engineers (designers, checkers, site engineers), railway technology fans, teachers and students.

This app helps in calculations of all kinematical parameters that characterise train travelling through circular curve and transition (parabolic/clothoid). These parameters are:
- equilibrium cant,
- cant deficiency,
- rate of change of cant (RCC),
- rate of change of cant deficiency (RCD),
- cant gradient,
- track twist,
- cant deficiency to cant ratio,
- cant deficiency to equilibrium cant ratio,
- unbalanced centrifugal acceleration,
- jerk,
- transition travel time,
- rate of change of train rotation,
- equilibrium speed,
- cant deficiency 20 speed,
- maximum desirable speed,
- maximum absolute speed.

Another features of the app are:
- speed units i km/h, mph or m/s,
- many gauge presets (broad gauges, standard gauge, narrow gauges),
- curve automatic optimisation for desirable parameters,
- curve automatic optimisation for absolute parameters,
- using and saving local desirable and absolute parameters,
- e-mailing calculation results,
- access to definitions, information and formulas,
- working also with negative cant,
- Radius - Degree of Curve conversion,
- AREMA transitions length calculations,
- and more.

No matter what national standards you use - this app is an universal tool!