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<p>through excessive control surface movement. To overcome this problem, artificial feel systems can be used. For example, for the controls of the <a href="page.php?w=RAF">RAF</a>'s <a href="page.php?w=Avro_Vulcan">Avro Vulcan</a> jet <a href="page.php?w=bomber">bomber</a> and the <a href="page.php?w=RCAF">RCAF</a>'s <a href="page.php?w=Avro_Canada_CF-105_Arrow">Avro Canada CF-105 Arrow</a> supersonic interceptor (both 1950s-era designs), the required force feedback was achieved by a spring device.  The <a href="page.php?w=Fulcrum_%28mechanics%29">fulcrum</a></p><p>
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