| Mass1 | M1 | Mass in direction 1, units of mass consistent with model | Number |
| Mass2 | M2 | Mass in direction 2, units of mass consistent with model, will default to direction 1 | Number |
| Mass3 | M3 | Mass in direction 2, units of mass consistent with model, will default to direction 1 | Number |
| Inertia1 | I1 | Interial Mass in direction 1, units of mass consistent with model | Number |
| Inertia2 | I2 | Interial Mass in direction 2, units of mass consistent with model | Number |
| Inertia3 | I3 | Interial Mass in direction 3, units of mass consistent with model | Number |
| Local | L | Local axis if true, global if false | Boolean |