diff --git a/src/constants.rs b/src/constants.rs
index 75b38c5..b882bae 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -2,7 +2,7 @@
 /// the native unit is mm
 
 const IN2MM: f32 = 25.4;
-pub const CHORD: f32 = 11.2 * IN2MM;
+pub const CHORD: f32 = 5.0 * IN2MM;
 pub const WING_TAPER: f32 = 0.6;
 pub const WINGSPAN: f32 = 45.0 * IN2MM;
 pub const LENGTH: f32 = 30.0*IN2MM;
@@ -15,10 +15,10 @@ pub const FUSELAGE_GAP: f32 = 2.0 * IN2MM;
 /// a very large number, used to place unknown objects such that they do not intersect
 pub const INF: f32 = 1000.0;
 pub const RUDDER_HEIGHT: f32 = 5.0 *IN2MM;
-pub const RUDDER_CHORD: f32 = 4.0 *IN2MM;
+pub const RUDDER_CHORD: f32 = 3.0 *IN2MM;
 pub const RUDDER_TAPER: f32 = 0.7;
 pub const RUDDER_STRUTS: usize = 3;
-pub const ELEVATOR_HEIGHT: f32 = 5.0 *IN2MM;
-pub const ELEVATOR_CHORD: f32 = 4.0 *IN2MM;
+pub const ELEVATOR_HEIGHT: f32 = 8.0 *IN2MM;
+pub const ELEVATOR_CHORD: f32 = 3.0 *IN2MM;
 pub const ELEVATOR_TAPER: f32 = 0.7;
 pub const ELEVATOR_STRUTS: usize = 3;