diff --git a/monashspa/PHS3000/tutorials/__init__.py b/monashspa/PHS3000/tutorials/__init__.py
index 6b2f5aa..f4a1626 100644
--- a/monashspa/PHS3000/tutorials/__init__.py
+++ b/monashspa/PHS3000/tutorials/__init__.py
@@ -24,7 +24,7 @@ def model_1(r, w, I):
     # scale parameters
     r = r*1e-3
     w = w*1e-4
-    I = I*1e11*4/1.11803
+    I = I*1e11
     
     # set parameters we are not exposing
     eccentricity = 1.1