[KevinMcTaggart]

I'm getting unexpected forces and motions for a ship in steady flow, free to heave and pitch. Using X 40 3 (Triangle based integration from the geometrical representation), here are some unexpected behaviours:
N 40 1 (2nd-order Adams-Bashforth) - No output forces or motions
N 40 2 (2rd-order TVD Runge-Kutta) - Output time for forces is 1.5 times actual value
N 40 3 (3rd-order TVD Runge-Kutta) - Similar problem to N 40 2
N 40 4 (3rd-order TVD Runge-Kutta low storage) - Output forces appear to have very strange cyclical behaviour every 3 time steps (e.g., drag forces are 0.99, 0.72, 0.60, 0.99, 0.72, 0.60, ...)

[Chalwwz]

Hi, thanks for testing out the different temporal schemes, however, the discrepancies could be a result of other setups as well. If you may, you could share the control.txt and ctrl.txt and other supporting files like stl, exp. so we can give a test.