diff --git a/web/src/Boomerang.ts b/web/src/Boomerang.ts
index b69a083..d744f59 100644
--- a/web/src/Boomerang.ts
+++ b/web/src/Boomerang.ts
@@ -17,9 +17,10 @@ export class Boomerang {
 
   constructor(scene: THREE.Scene) {
     const shape = new THREE.Shape();
-    const outer = 1.05;
-    const inner = 0.5;
-    const half = (58 * Math.PI) / 180;
+    // Dünner Sichel-Bumerang: Bogen (~120° = 1/3 Kreis) mit schmaler Bahn
+    const outer = 0.75;
+    const inner = 0.47;
+    const half = (60 * Math.PI) / 180;
     const capR = (outer - inner) / 2;
     const mid = (outer + inner) / 2;
 
@@ -32,7 +33,7 @@ export class Boomerang {
     shape.absarc(0, 0, inner, half, -half, true);
     shape.absarc(
       mid * Math.cos(-half), mid * Math.sin(-half),
-      capR, -half + Math.PI, -half, true
+      capR, -half + Math.PI, -half, false
     );
     shape.closePath();
     const geom = new THREE.ExtrudeGeometry(shape, {