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diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/AMS_CS5_RC_Airplane/prop_pwl.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/AMS_CS5_RC_Airplane/prop_pwl.vhd
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index 000000000..739a9c40c
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+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/AMS_CS5_RC_Airplane/prop_pwl.vhd
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+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+library ieee_proposed;  use ieee_proposed.mechanical_systems.all;
+
+entity prop_pwl is
+  generic ( ydata : real_vector;    -- torque data points
+            xdata : real_vector );  -- velocity data points
+  port ( terminal shaft1 : rotational_v );
+end entity prop_pwl;
+
+----------------------------------------------------------------
+
+architecture ideal of prop_pwl is
+
+  use work.pwl_functions.all;
+
+  quantity w across torq through shaft1 to rotational_v_ref;
+
+begin
+
+  torq == pwl_dim1_extrap(w, xdata, ydata);
+
+end architecture ideal;