diff --git a/src/bin/flat/tube/mod.rs b/src/bin/flat/tube/mod.rs
index 8cfb578..28f7357 100644
--- a/src/bin/flat/tube/mod.rs
+++ b/src/bin/flat/tube/mod.rs
@@ -283,7 +283,7 @@ mod coords {
 
 		// NB: имеет разрыв в области Inner на y = 0.
 		fn global_to_outer(self, loc: Location) -> Location {
-			let inner = Rect { size: vec2(self.inner_radius, self.internal_halflength) };
+			let inner = Rect { size: vec2(self.inner_radius, self.external_halflength) };
 			if inner.is_inside(loc.pos) {
 				let Vec2 { x: u, y } = loc.pos; // в основной СК
 				let v = self.v(y) + y.signum() * (self.external_halflength - self.internal_halflength);