diff --git a/addons/aircraft/flightmodel_thunderbolt.hpp b/addons/aircraft/flightmodel_thunderbolt.hpp
index fa99f40424..2446e166bc 100644
--- a/addons/aircraft/flightmodel_thunderbolt.hpp
+++ b/addons/aircraft/flightmodel_thunderbolt.hpp
@@ -20,4 +20,3 @@ envelope[] = {0,0,0.75,2.4,3.6,3.8,3.7,3.2,2.2,1.7,0.9};
 thrustCoef[] = {1,1.2,1.3,1.25,1.06,1.01,1,0.92,0.75,0.65,0.5,0.25,0};
 acceleration = 265;
 landingSpeed = 220;
-gunAimDown = 0.087266463;