diff --git a/projects/VC7.1/FlightGear.vcproj b/projects/VC7.1/FlightGear.vcproj
index 736519e90..c5ea2cc57 100755
--- a/projects/VC7.1/FlightGear.vcproj
+++ b/projects/VC7.1/FlightGear.vcproj
@@ -449,16 +449,6 @@
 				</File>
 			</Filter>
 		</Filter>
-		<Filter
-			Name="Lib_Balloon"
-			Filter="">
-			<File
-				RelativePath="..\..\src\FDM\Balloon\BalloonSim.cpp">
-			</File>
-			<File
-				RelativePath="..\..\src\FDM\Balloon\BalloonSim.h">
-			</File>
-		</Filter>
 		<Filter
 			Name="Lib_JSBSim"
 			Filter="">
@@ -1730,12 +1720,6 @@
 		<Filter
 			Name="Lib_Flight"
 			Filter="">
-			<File
-				RelativePath="..\..\src\FDM\Balloon.cxx">
-			</File>
-			<File
-				RelativePath="..\..\src\FDM\Balloon.h">
-			</File>
 			<File
 				RelativePath="..\..\src\FDM\flight.cxx">
 			</File>
@@ -1748,12 +1732,6 @@
 			<File
 				RelativePath="..\..\src\Fdm\groundcache.hxx">
 			</File>
-			<File
-				RelativePath="..\..\src\FDM\MagicCarpet.cxx">
-			</File>
-			<File
-				RelativePath="..\..\src\FDM\MagicCarpet.hxx">
-			</File>
 			<File
 				RelativePath="..\..\src\FDM\NullFDM.cxx">
 			</File>