My Chesapeake Sport Tandem is just about finished and I'm looking into transport options.  I've got a Subaru Outback with installed crossrails, and I'm wondering if I can carry it just on the crossrails, with some padding to protect the finish.  The only thing is that the crossrails arc a little bit, so I'm not sure if it will be secure enough.  If you guys have any experience I'd really appreciate it! 
Thanks,
Joe
             
            
              
              
              
            
            
           
          
            
            
              http://www.clcboats.com/shop/products/boat-gear/boat-transportation-storage-gear/aero-roof-rack-pads.html
             
            
              
              
              
            
            
           
          
            
            
              I use pads like these on a Subaru Forester.  they can be gotten at EMS, REI, Dicks, etc.  Also sold as kit with tie down straps.  I use two straps, one before cockpit and one after for short distances.  for longer distance or highway speed I and bow lines.  Two kayaks, 2 sets.  Have made long trips at 70 MPH without a problem.
 
http://www.drdcorp.com/roofracks/foam1.jpg
 
Ed
             
            
              
              
              
            
            
           
          
            
            
              OK make that ADD bow lines.  One trick, any time the straps bridge a distance from chine to rack, put a half or whole twist.  Otherwise it wants to buzz in the wind. 
Ed