diff --git a/gui/SimOptionsWindow.cpp b/gui/SimOptionsWindow.cpp
index 49fa931..a357db2 100644
--- a/gui/SimOptionsWindow.cpp
+++ b/gui/SimOptionsWindow.cpp
@@ -20,7 +20,6 @@ SimOptionsWindow::SimOptionsWindow(QWidget *parent) :
     ui->setupUi(this);
 
     // populate the combo boxes
-    QtRocket* qtrocket = QtRocket::getInstance();
 
     std::shared_ptr<sim::SimulationOptions> options(new sim::SimulationOptions);
     std::vector<std::string> atmosphereModels = options->getAvailableAtmosphereModels();
diff --git a/model/Rocket.cpp b/model/Rocket.cpp
index 4946a7c..a1c860a 100644
--- a/model/Rocket.cpp
+++ b/model/Rocket.cpp
@@ -10,6 +10,7 @@ void Rocket::launch()
 {
    propagator.setTimeStep(QtRocket::getInstance()->getTimeStep());
     propagator.clearStates();
+   propagator.setCurrentTime(0.0);
     mm.startMotor(0.0);
    propagator.runUntilTerminate();
 }
diff --git a/sim/Propagator.h b/sim/Propagator.h
index f483a35..9e1151b 100644
--- a/sim/Propagator.h
+++ b/sim/Propagator.h
@@ -52,6 +52,7 @@ public:
     const std::vector<std::pair<double, std::vector<double>>>& getStates() const { return states; }
 
     void clearStates() { states.clear(); }
+    void setCurrentTime(double t) { currentTime = t; }
 
     void setTimeStep(double ts) { timeStep = ts; }