Once the chute is created, the time elapsed before the chute is open depends on the addon itself.
_chuto = _type createVehicle [0,0,0]; // <<<---- chute creation
_chuto setPos _posc;
_chuto setVectorDir _vdir;
_chuto setVectorUp _vup;
_chuto setVelocity _vvel;
_man moveInDriver _chuto;