diff --git a/core/src/net/sf/openrocket/file/DatabaseMotorFinderWithMissingMotors.java b/core/src/net/sf/openrocket/file/DatabaseMotorFinderWithMissingMotors.java
deleted file mode 100644
index 5270151b3..000000000
--- a/core/src/net/sf/openrocket/file/DatabaseMotorFinderWithMissingMotors.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package net.sf.openrocket.file;
-
-import net.sf.openrocket.aerodynamics.WarningSet;
-import net.sf.openrocket.motor.Motor;
-import net.sf.openrocket.motor.Motor.Type;
-import net.sf.openrocket.motor.ThrustCurveMotorPlaceholder;
-
-public class DatabaseMotorFinderWithMissingMotors extends DatabaseMotorFinder
-implements MotorFinder {
-
-	/**
-	 * This implementation returns a ThrustCurveMotorPlaceholder.
-	 */
-	@Override
-	protected Motor handleMissingMotor(Type type, String manufacturer, String designation, double diameter, double length, String digest, WarningSet warnings) {
-		Motor motor = new ThrustCurveMotorPlaceholder(type,
-				manufacturer,
-				designation,
-				diameter,
-				length,
-				digest,
-				/* delay */ Double.NaN,
-				/*launchMass*/ Double.NaN,
-				/*emptyMass*/ Double.NaN);
-		return motor;
-	}
-}
diff --git a/core/src/net/sf/openrocket/motor/ThrustCurveMotorPlaceholder.java b/core/src/net/sf/openrocket/motor/ThrustCurveMotorPlaceholder.java
deleted file mode 100644
index fd173d5d6..000000000
--- a/core/src/net/sf/openrocket/motor/ThrustCurveMotorPlaceholder.java
+++ /dev/null
@@ -1,239 +0,0 @@
-package net.sf.openrocket.motor;
-
-import net.sf.openrocket.util.BugException;
-
-public class ThrustCurveMotorPlaceholder implements Motor {
-	
-	private final Motor.Type type;
-	private final String manufacturer;
-	private final String designation;
-	private final double diameter;
-	private final double length;
-	private final String digest;
-	private final double delay;
-	private final double launchMass;
-	private final double emptyMass;
-	
-	
-	public ThrustCurveMotorPlaceholder(Type type, String manufacturer, String designation, double diameter, double length,
-			String digest, double delay, double launchMass, double emptyMass) {
-		this.type = type;
-		this.manufacturer = manufacturer;
-		this.designation = designation;
-		this.diameter = diameter;
-		this.length = length;
-		this.digest = digest;
-		this.delay = delay;
-		this.launchMass = launchMass;
-		this.emptyMass = emptyMass;
-	}
-	
-	
-	@Override
-	public Type getMotorType() {
-		return type;
-	}
-	
-	public String getManufacturer() {
-		return manufacturer;
-	}
-	
-	@Override
-	public String getDesignation() {
-		return designation;
-	}
-	
-	@Override
-	public String getDesignation(double designationDelay) {
-		return designation + "-" + ThrustCurveMotor.getDelayString(designationDelay);
-	}
-	
-	@Override
-	public String getDescription() {
-		return "";
-	}
-	
-	@Override
-	public double getDiameter() {
-		return diameter;
-	}
-	
-	@Override
-	public double getLength() {
-		return length;
-	}
-	
-	@Override
-	public String getDigest() {
-		return digest;
-	}
-	
-	public double getDelay() {
-		return delay;
-	}
-	
-	@Override
-	public Motor clone() {
-		throw new BugException("Called getInstance on PlaceholderMotor");
-	}
-	
-	@Override
-	public double getBurnTimeEstimate() {
-		return Double.NaN;
-	}
-	
-	@Override
-	public double getAverageThrustEstimate() {
-		return Double.NaN;
-	}
-	
-	@Override
-	public double getMaxThrustEstimate() {
-		return Double.NaN;
-	}
-	
-	@Override
-	public double getTotalImpulseEstimate() {
-		return Double.NaN;
-	}
-
-	@Override
-	public int hashCode() {
-		final int prime = 31;
-		int result = 1;
-		long temp;
-		temp = Double.doubleToLongBits(delay);
-		result = prime * result + (int) (temp ^ (temp >>> 32));
-		result = prime * result
-				+ ((designation == null) ? 0 : designation.hashCode());
-		temp = Double.doubleToLongBits(diameter);
-		result = prime * result + (int) (temp ^ (temp >>> 32));
-		result = prime * result + ((digest == null) ? 0 : digest.hashCode());
-		temp = Double.doubleToLongBits(emptyMass);
-		result = prime * result + (int) (temp ^ (temp >>> 32));
-		temp = Double.doubleToLongBits(launchMass);
-		result = prime * result + (int) (temp ^ (temp >>> 32));
-		temp = Double.doubleToLongBits(length);
-		result = prime * result + (int) (temp ^ (temp >>> 32));
-		result = prime * result
-				+ ((manufacturer == null) ? 0 : manufacturer.hashCode());
-		result = prime * result + ((type == null) ? 0 : type.hashCode());
-		return result;
-	}
-
-	@Override
-	public boolean equals(Object obj) {
-		if (this == obj)
-			return true;
-		if (obj == null)
-			return false;
-		if (getClass() != obj.getClass())
-			return false;
-		ThrustCurveMotorPlaceholder other = (ThrustCurveMotorPlaceholder) obj;
-		if (Double.doubleToLongBits(delay) != Double
-				.doubleToLongBits(other.delay))
-			return false;
-		if (designation == null) {
-			if (other.designation != null)
-				return false;
-		} else if (!designation.equals(other.designation))
-			return false;
-		if (Double.doubleToLongBits(diameter) != Double
-				.doubleToLongBits(other.diameter))
-			return false;
-		if (digest == null) {
-			if (other.digest != null)
-				return false;
-		} else if (!digest.equals(other.digest))
-			return false;
-		if (Double.doubleToLongBits(emptyMass) != Double
-				.doubleToLongBits(other.emptyMass))
-			return false;
-		if (Double.doubleToLongBits(launchMass) != Double
-				.doubleToLongBits(other.launchMass))
-			return false;
-		if (Double.doubleToLongBits(length) != Double
-				.doubleToLongBits(other.length))
-			return false;
-		if (manufacturer == null) {
-			if (other.manufacturer != null)
-				return false;
-		} else if (!manufacturer.equals(other.manufacturer))
-			return false;
-		if (type != other.type)
-			return false;
-		return true;
-	}
-
-
-	@Override
-	public String toString() {
-		return "ThrustCurveMotorPlaceholder [manufacturer=" + manufacturer
-				+ ", designation=" + designation + "]";
-	}
-	
-	@Override
-	public double getLaunchCGx() {
-		return length / 2;
-	}
-
-	@Override
-	public double getBurnoutCGx() {
-		return length / 2;
-	}
-
-	@Override
-	public double getLaunchMass() {
-		return launchMass;
-	}
-
-	@Override
-	public double getBurnoutMass() {
-		return emptyMass;
-	}
-
-	@Override
-	public double getThrust(double pseudoIndex) {
-		return 0;
-	}
-
-	@Override
-	public double getAverageThrust(double startTime, double endTime) {
-		return 0;
-	}
-
-	@Override
-	public double getTotalMass(final double motorTime) {
-		return 0;
-	}
-	
-	@Override
-	public double getPropellantMass( final Double motorTime){
-		return 0.;
-	}
-	
-	@Override
-	public double getCMx(double pseudoIndex) {
-		return 0;
-	}
-	
-	@Override
-	public double getBurnTime() { 
-		return 0; 
-	}
-	
-	@Override
-	public double getUnitIxx() {
-		return 0.; 
-	}
-	
-	@Override
-	public double getUnitIyy() {
-		return 0.;
-	}
-
-	@Override
-	public double getUnitIzz(){
-		return 0.;
-	}
-}