&run_pars
  cvsid='$Id: run.in,v 1.1 2003/09/20 07:46:10 brandenb Exp $',
  nt=30000, it1=20, cdt=0.4, cdtv=0.80, isave=10, itorder=3,
  dsnap=200., dvid=2.,
/
&hydro_run_pars
  nu=5e-4, ivisc='nu-const',
/
&density_run_pars
/
&forcing_run_pars
  iforce='helical', force=0.05, relhel=1.,
/
&magnetic_run_pars
  eta=5e-4, B_ext=0.,0.,.02
/
