diff --git a/lib/src/test/java/org/fairportrobotics/frc/robolib/trajectory/ballistics/models/ConstantBM.java b/lib/src/test/java/org/fairportrobotics/frc/robolib/trajectory/ballistics/models/ConstantBM.java
new file mode 100644
index 0000000..bf01a76
--- /dev/null
+++ b/lib/src/test/java/org/fairportrobotics/frc/robolib/trajectory/ballistics/models/ConstantBM.java
@@ -0,0 +1,129 @@
+package org.fairportrobotics.frc.robolib.trajectory.ballistics.models;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+
+import org.fairportrobotics.frc.robolib.trajectory.Velocity3d;
+
+import edu.wpi.first.math.geometry.Translation3d;
+import edu.wpi.first.units.measure.Distance;
+import edu.wpi.first.units.measure.Time;
+
+public class ConstantBM extends ReversableRadialBM<Integer> {
+    private Velocity3d velocityResult;
+    private Translation3d positionResult;
+    private Time revResult;
+    private int initParam;
+    private int minParam;
+    private int maxParam;
+
+    private HashSet<Integer> computedParams;
+
+
+    //
+    //  Setup code
+    //
+
+    public ConstantBM(
+        Translation3d posLaunch,
+        Translation3d posTarget
+    ) {
+        super(posLaunch, posTarget);
+
+        this.velocityResult = null;
+        this.positionResult = null;
+        this.revResult      = null;
+
+        this.initParam      = 0;
+        this.minParam       = 0;
+        this.maxParam       = 0;
+        this.computedParams = new HashSet<>();
+    }
+
+
+    public ConstantBM setVelocityResult(Velocity3d velocityResult) {
+        this.velocityResult = velocityResult;
+        return this;
+    }
+
+
+    public ConstantBM setPositionResult(Translation3d positionResult) {
+        this.positionResult = positionResult;
+        return this;
+    }
+
+
+    public ConstantBM setRevResult(Time revResult) {
+        this.revResult = revResult;
+        return this;
+    }
+
+
+    public ConstantBM setInitParam(int initParam) {
+        this.initParam = initParam;
+        return this;
+    }
+
+
+    public ConstantBM setMinParam(int minParam) {
+        this.minParam = minParam;
+        return this;
+    }
+
+
+    //
+    //  Parameter manipulation
+    //
+
+    public Integer getInitParam() {
+        return this.initParam;
+    }
+
+
+    public Integer[] getNeighborParams(Integer param) {
+        ArrayList<Integer> neighbors = new ArrayList<>();
+        if(param-1 >= minParam) neighbors.add(param-1);
+        if(param+1 <= maxParam) neighbors.add(param+1);
+        return neighbors.toArray(new Integer[0]);
+    }
+
+
+    //
+    //  Velocity modelling
+    //
+
+    public Velocity3d getCandidateVelocity(Integer param) {
+        this.computedParams.add(param);
+        return this.velocityResult;
+    }
+
+
+    public Translation3d positionAtTime(Velocity3d velocity, Time time) {
+        return this.positionResult;
+    }
+
+
+    //
+    //  Reverse functions
+    //
+
+    public Time getTimeAtRadius(Velocity3d candidate, Distance radialDistance) {
+        return revResult;
+    }
+
+
+    //
+    //  Candidate tracking
+    //
+
+    public boolean paramComputed(Integer param) {
+        return this.computedParams.contains(param);
+    }
+
+
+    public void paramComputedReset() {
+        this.computedParams = new HashSet<>();
+    }
+
+
+}