"Reaching the mockup stage makes it more advanced than a paper space plane."<br /><br />Do you have a feeling what role this mock-up serves in the development process for this vehicle? A mock-up can be an advanced fit test, a preliminary prototype for examining the man machine operation, a tool for training, or something for publicity, or all or none of the above.<br /><br />Wayne <div class="Discussion_UserSignature"> <p>"1) Give no quarter; 2) Take no prisoners; 3) Sink everything." Admiral Jackie Fisher</p> </div>