diff --git a/QtRocket.cpp b/QtRocket.cpp
index 703ea20..e144d59 100644
--- a/QtRocket.cpp
+++ b/QtRocket.cpp
@@ -75,10 +75,15 @@ QtRocket::QtRocket()
    running = false;
 
    atmosphere =
-        std::make_shared<sim::ConstantAtmosphere>();
+      std::make_shared<sim::ConstantAtmosphere>();
 
    gravity =
-        std::make_shared<sim::ConstantGravityModel>();
+      std::make_shared<sim::ConstantGravityModel>();
+
+
+   rocket =
+      std::make_shared<Rocket>();
+
 }
 
 int QtRocket::run(int argc, char* argv[])
diff --git a/gui/ThrustCurveMotorSelector.cpp b/gui/ThrustCurveMotorSelector.cpp
index 6f29ea6..aee1681 100644
--- a/gui/ThrustCurveMotorSelector.cpp
+++ b/gui/ThrustCurveMotorSelector.cpp
@@ -1,7 +1,15 @@
 
+/// \cond
+// C headers
+// C++ headers
+#include <algorithm>
+// 3rd party headers
+/// \endcond
+
 // qtrocket headers
 #include "ThrustCurveMotorSelector.h"
 #include "ui_ThrustCurveMotorSelector.h"
+#include "QtRocket.h"
 
 ThrustCurveMotorSelector::ThrustCurveMotorSelector(QWidget *parent) :
    QDialog(parent),
@@ -57,6 +65,7 @@ void ThrustCurveMotorSelector::on_searchButton_clicked()
    c.addCriteria("impulseClass", impulseClass);
 
    std::vector<model::MotorModel> motors = tcApi->searchMotors(c);
+   std::copy(std::begin(motors), std::end(motors), std::back_inserter(motorModels));
 
    for(const auto& i : motors)
    {
@@ -65,3 +74,22 @@ void ThrustCurveMotorSelector::on_searchButton_clicked()
 
 }
 
+
+void ThrustCurveMotorSelector::on_setMotor_clicked()
+{
+   //asdf
+   std::string commonName = ui->motorSelection->currentText().toStdString();
+
+   // get motor
+
+   model::MotorModel mm = *std::find_if(
+       std::begin(motorModels),
+       std::end(motorModels),
+       [&commonName](const auto& item)
+       {
+           return item.commonName == commonName;
+       });
+
+   QtRocket::getInstance()->getRocket()->setMotorModel(mm);
+}
+
diff --git a/gui/ThrustCurveMotorSelector.h b/gui/ThrustCurveMotorSelector.h
index b123651..fa07c3b 100644
--- a/gui/ThrustCurveMotorSelector.h
+++ b/gui/ThrustCurveMotorSelector.h
@@ -12,6 +12,7 @@
 
 // qtrocket headers
 #include "utils/ThrustCurveAPI.h"
+#include "model/MotorModel.h"
 
 namespace Ui {
 class ThrustCurveMotorSelector;
@@ -33,10 +34,14 @@ private slots:
 
    void on_searchButton_clicked();
 
-private:
+   void on_setMotor_clicked();
+
+   private:
    Ui::ThrustCurveMotorSelector *ui;
 
    std::unique_ptr<utils::ThrustCurveAPI> tcApi;
+
+   std::vector<model::MotorModel> motorModels;
 };
 
 #endif // THRUSTCURVEMOTORSELECTOR_H
diff --git a/gui/ThrustCurveMotorSelector.ui b/gui/ThrustCurveMotorSelector.ui
index 6cacd12..ef47b7c 100644
--- a/gui/ThrustCurveMotorSelector.ui
+++ b/gui/ThrustCurveMotorSelector.ui
@@ -94,25 +94,31 @@
   <widget class="QWidget" name="formLayoutWidget_2">
    <property name="geometry">
     <rect>
-     <x>170</x>
-     <y>260</y>
-     <width>160</width>
+     <x>140</x>
+     <y>240</y>
+     <width>221</width>
      <height>41</height>
     </rect>
    </property>
    <layout class="QFormLayout" name="formLayout_2">
-    <item row="0" column="0">
-     <widget class="QPushButton" name="pushButton_2">
-      <property name="text">
-       <string>Download</string>
-      </property>
-     </widget>
-    </item>
     <item row="0" column="1">
      <widget class="QComboBox" name="motorSelection"/>
     </item>
    </layout>
   </widget>
+  <widget class="QPushButton" name="setMotor">
+   <property name="geometry">
+    <rect>
+     <x>200</x>
+     <y>290</y>
+     <width>80</width>
+     <height>25</height>
+    </rect>
+   </property>
+   <property name="text">
+    <string>setMotor</string>
+   </property>
+  </widget>
  </widget>
  <customwidgets>
   <customwidget>
diff --git a/model/Rocket.cpp b/model/Rocket.cpp
index 883b7a7..608318a 100644
--- a/model/Rocket.cpp
+++ b/model/Rocket.cpp
@@ -9,18 +9,12 @@ Rocket::Rocket() : propagator(this)
 
 void Rocket::launch()
 {
-   tc.setIgnitionTime(5.0);
-   std::vector<std::pair<double, double>> temp;
-   temp.push_back(std::make_pair(0.0, 0.0));
-   temp.push_back(std::make_pair(0.1, 10.0));
-   temp.push_back(std::make_pair(0.2, 100.0));
-   temp.push_back(std::make_pair(1.2, 50.0));
-   temp.push_back(std::make_pair(1.3, 0.0));
-   temp.push_back(std::make_pair(8.0, 0.0));
-   temp.push_back(std::make_pair(9.0, 100.0));
-   temp.push_back(std::make_pair(10.0, 0.0));
-   tc.setThrustCurveVector(temp);
-    propagator.runUntilTerminate();
+   propagator.runUntilTerminate();
+}
+
+void Rocket::setMotorModel(const model::MotorModel& motor)
+{
+   mm = motor;
 }
 
 bool Rocket::terminateCondition(const std::pair<double, std::vector<double>>& cond)
diff --git a/model/ThrustCurve.h b/model/ThrustCurve.h
index 37467fc..9bf6129 100644
--- a/model/ThrustCurve.h
+++ b/model/ThrustCurve.h
@@ -26,24 +26,9 @@ public:
    ThrustCurve(ThrustCurve&&) = default;
    ~ThrustCurve();
 
-   ThrustCurve& operator=(const ThrustCurve& rhs)
-   {
-      if(this != &rhs)
-      {
-         thrustCurve = rhs.thrustCurve;
-         maxTime = rhs.maxTime;
-         ignitionTime = rhs.ignitionTime;
-      }
-      return *this;
-   }
+   ThrustCurve& operator=(const ThrustCurve& rhs) = default;
 
-   ThrustCurve& operator=(ThrustCurve&& rhs)
-   {
-      thrustCurve = std::move(rhs.thrustCurve);
-      maxTime = std::move(rhs.maxTime);
-      ignitionTime = std::move(rhs.ignitionTime);
-      return *this;
-   }
+   ThrustCurve& operator=(ThrustCurve&& rhs) = default;
 
    /**
     * Assuming that the thrust is one dimensional. Seems reasonable, but just
diff --git a/sim/Propagator.cpp b/sim/Propagator.cpp
index dbdc69a..c204f6a 100644
--- a/sim/Propagator.cpp
+++ b/sim/Propagator.cpp
@@ -23,8 +23,7 @@ namespace sim {
 
 Propagator::Propagator(Rocket* r)
    : integrator(),
-     rocket(r),
-     qtrocket(QtRocket::getInstance())
+     rocket(r)
 
 {
 
@@ -45,9 +44,9 @@ Propagator::Propagator(Rocket* r)
       /* dvx/dt */ [this](double, const std::vector<double>& ) -> double { return getForceX() / getMass(); },
       /* dvy/dt */ [this](double, const std::vector<double>& ) -> double { return getForceY() / getMass(); },
       /* dvz/dt */ [this](double, const std::vector<double>& ) -> double { return getForceZ() / getMass(); },
-       /* dpitch/dt    */ [this](double, const std::vector<double>& s) -> double { return s[9]; },
-       /* dyaw/dt      */ [this](double, const std::vector<double>& s) -> double { return s[10]; },
-       /* droll/dt     */ [this](double, const std::vector<double>& s) -> double { return s[11]; },
+       /* dpitch/dt    */ [](double, const std::vector<double>& s) -> double { return s[9]; },
+       /* dyaw/dt      */ [](double, const std::vector<double>& s) -> double { return s[10]; },
+       /* droll/dt     */ [](double, const std::vector<double>& s) -> double { return s[11]; },
        /* dpitchRate/dt */ [this](double, const std::vector<double>& s) -> double { (getTorqueP() - s[7] * s[8] * (getIroll() - getIyaw())) / getIpitch(); },
        /* dyawRate/dt   */ [this](double, const std::vector<double>& s) -> double { (getTorqueQ() - s[6] * s[9] * (getIpitch() - getIroll())) / getIyaw(); },
       /* drollRate/dt   */ [this](double, const std::vector<double>& s) -> double { (getTorqueR() - s[6] * s[7] * (getIyaw() - getIpitch())) / getIroll(); }));
@@ -97,16 +96,19 @@ double Propagator::getMass()
 
 double Propagator::getForceX()
 {
+    QtRocket* qtrocket = QtRocket::getInstance();
     return - qtrocket->getAtmosphereModel()->getDensity(currentState[3])/ 2.0 * 0.008107 * rocket->getDragCoefficient() * currentState[3]* currentState[3];
 }
 
 double Propagator::getForceY()
 {
+    QtRocket* qtrocket = QtRocket::getInstance();
     return -qtrocket->getAtmosphereModel()->getDensity(currentState[3]) / 2.0 * 0.008107 * rocket->getDragCoefficient() * currentState[4]* currentState[4];
 }
 
 double Propagator::getForceZ()
 {
+    QtRocket* qtrocket = QtRocket::getInstance();
     double gravity = (qtrocket->getGravityModel()->getAccel(currentState[0], currentState[1], currentState[2])).x3;
     double airDrag = -qtrocket->getAtmosphereModel()->getDensity(currentState[3]) / 2.0 * 0.008107 * rocket->getDragCoefficient() * currentState[5]* currentState[5];
     double thrust  = rocket->getThrust(currentTime);
diff --git a/sim/Propagator.h b/sim/Propagator.h
index 1f7515a..613aef5 100644
--- a/sim/Propagator.h
+++ b/sim/Propagator.h
@@ -74,7 +74,6 @@ private:
    std::unique_ptr<sim::DESolver> integrator;
 
    Rocket* rocket;
-   QtRocket* qtrocket;
 
    std::vector<double> currentState{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
    std::vector<double> tempRes{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};